Serial refactor. Default 8-bit ECHO to int, not char (#20985)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/HAL/AVR/MarlinSerial.cpp

@@ -595,7 +595,7 @@ MSerialT customizedSerial1(MSerialT::HasEmergencyParser);
     MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>>::_tx_udr_empty_irq();
   }
 
-  template class MarlinSerial< MarlinSerialCfg<MMU2_SERIAL_PORT> >;
+  template class MarlinSerial< MMU2SerialCfg<MMU2_SERIAL_PORT> >;
   MSerialT3 mmuSerial(MSerialT3::HasEmergencyParser);
 #endif
 

Marlin/src/HAL/AVR/MarlinSerial.h

@@ -263,7 +263,7 @@
   };
 
   typedef Serial0Type< MarlinSerial< MMU2SerialCfg<MMU2_SERIAL_PORT> > > MSerialT3;
-  extern MSerial3 mmuSerial;
+  extern MSerialT3 mmuSerial;
 #endif
 
 #ifdef LCD_SERIAL_PORT

Marlin/src/HAL/AVR/pinsDebug.h

@@ -235,8 +235,8 @@ static void print_is_also_tied() { SERIAL_ECHOPGM(" is also tied to this pin");
 
 inline void com_print(const uint8_t N, const uint8_t Z) {
   const uint8_t *TCCRA = (uint8_t*)TCCR_A(N);
-  SERIAL_ECHOPGM("    COM");
-  SERIAL_CHAR('0' + N, Z);
+  SERIAL_ECHOPAIR("    COM", AS_CHAR('0' + N));
+  SERIAL_CHAR(Z);
   SERIAL_ECHOPAIR(": ", int((*TCCRA >> (6 - Z * 2)) & 0x03));
 }
 
@@ -247,8 +247,8 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
   uint8_t WGM = (((*TCCRB & _BV(WGM_2)) >> 1) | (*TCCRA & (_BV(WGM_0) | _BV(WGM_1))));
   if (N == 4) WGM |= ((*TCCRB & _BV(WGM_3)) >> 1);
 
-  SERIAL_ECHOPGM("    TIMER");
-  SERIAL_CHAR(T + '0', L);
+  SERIAL_ECHOPAIR("    TIMER", AS_CHAR(T + '0'));
+  SERIAL_CHAR(L);
   SERIAL_ECHO_SP(3);
 
   if (N == 3) {
@@ -262,19 +262,11 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
   SERIAL_ECHOPAIR("    WGM: ", WGM);
   com_print(T,L);
   SERIAL_ECHOPAIR("    CS: ", (*TCCRB & (_BV(CS_0) | _BV(CS_1) | _BV(CS_2)) ));
-
-  SERIAL_ECHOPGM("    TCCR");
-  SERIAL_CHAR(T + '0');
-  SERIAL_ECHOPAIR("A: ", *TCCRA);
-
-  SERIAL_ECHOPGM("    TCCR");
-  SERIAL_CHAR(T + '0');
-  SERIAL_ECHOPAIR("B: ", *TCCRB);
+  SERIAL_ECHOPAIR("    TCCR", AS_CHAR(T + '0'), "A: ", *TCCRA);
+  SERIAL_ECHOPAIR("    TCCR", AS_CHAR(T + '0'), "B: ", *TCCRB);
 
   const uint8_t *TMSK = (uint8_t*)TIMSK(T);
-  SERIAL_ECHOPGM("    TIMSK");
-  SERIAL_CHAR(T + '0');
-  SERIAL_ECHOPAIR(": ", *TMSK);
+  SERIAL_ECHOPAIR("    TIMSK", AS_CHAR(T + '0'), ": ", *TMSK);
 
   const uint8_t OCIE = L - 'A' + 1;
   if (N == 3) { if (WGM == 0 || WGM == 2 || WGM ==  4 || WGM ==  6) err_is_counter(); }

Marlin/src/HAL/DUE/MarlinSerialUSB.cpp

@@ -33,10 +33,6 @@
 
 #include "MarlinSerialUSB.h"
 
-#if ENABLED(EMERGENCY_PARSER)
-  #include "../../feature/e_parser.h"
-#endif
-
 // Imports from Atmel USB Stack/CDC implementation
 extern "C" {
   bool usb_task_cdc_isenabled();
@@ -69,7 +65,7 @@ int MarlinSerialUSB::peek() {
 
   pending_char = udi_cdc_getc();
 
-  TERN_(EMERGENCY_PARSER, emergency_parser.update(emergency_state, (char)pending_char));
+  TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT*>(this)->emergency_state, (char)pending_char));
 
   return pending_char;
 }
@@ -91,7 +87,7 @@ int MarlinSerialUSB::read() {
 
   int c = udi_cdc_getc();
 
-  TERN_(EMERGENCY_PARSER, emergency_parser.update(emergency_state, (char)c));
+  TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT*>(this)->emergency_state, (char)c));
 
   return c;
 }
@@ -105,7 +101,6 @@ bool MarlinSerialUSB::available() {
 }
 
 void MarlinSerialUSB::flush() { }
-void MarlinSerialUSB::flushTX() { }
 
 size_t MarlinSerialUSB::write(const uint8_t c) {
 

Marlin/src/HAL/DUE/MarlinSerialUSB.h

@@ -34,21 +34,20 @@
 
 
 struct MarlinSerialUSB {
-  static void begin(const long);
-  static void end();
-  static int peek();
-  static int read();
-  static void flush();
-  static void flushTX();
-  static bool available();
-  static size_t write(const uint8_t c);
+  void begin(const long);
+  void end();
+  int peek();
+  int read();
+  void flush();
+  bool available();
+  size_t write(const uint8_t c);
 
   #if ENABLED(SERIAL_STATS_DROPPED_RX)
-    FORCE_INLINE static uint32_t dropped() { return 0; }
+    FORCE_INLINE uint32_t dropped() { return 0; }
   #endif
 
   #if ENABLED(SERIAL_STATS_MAX_RX_QUEUED)
-    FORCE_INLINE static int rxMaxEnqueued() { return 0; }
+    FORCE_INLINE int rxMaxEnqueued() { return 0; }
   #endif
 };
 typedef Serial0Type<MarlinSerialUSB> MSerialT;

Marlin/src/HAL/LPC1768/eeprom_sdcard.cpp

@@ -84,16 +84,16 @@ static void debug_rw(const bool write, int &pos, const uint8_t *value, const siz
   PGM_P const rw_str = write ? PSTR("write") : PSTR("read");
   SERIAL_CHAR(' ');
   serialprintPGM(rw_str);
-  SERIAL_ECHOLNPAIR("_data(", pos, ",", int(value), ",", int(size), ", ...)");
+  SERIAL_ECHOLNPAIR("_data(", pos, ",", value, ",", size, ", ...)");
   if (total) {
     SERIAL_ECHOPGM(" f_");
     serialprintPGM(rw_str);
-    SERIAL_ECHOPAIR("()=", int(s), "\n size=", int(size), "\n bytes_");
+    SERIAL_ECHOPAIR("()=", s, "\n size=", size, "\n bytes_");
     serialprintPGM(write ? PSTR("written=") : PSTR("read="));
     SERIAL_ECHOLN(total);
   }
   else
-    SERIAL_ECHOLNPAIR(" f_lseek()=", int(s));
+    SERIAL_ECHOLNPAIR(" f_lseek()=", s);
 }
 
 // File function return codes for type FRESULT. This goes away soon, but

Marlin/src/HAL/STM32F1/MarlinSerial.h

@@ -28,10 +28,6 @@
 #include "../../inc/MarlinConfigPre.h"
 #include "../../core/serial_hook.h"
 
-#if HAS_TFT_LVGL_UI
-  extern "C" { extern char public_buf_m[100]; }
-#endif
-
 // Increase priority of serial interrupts, to reduce overflow errors
 #define UART_IRQ_PRIO 1
 
@@ -49,28 +45,6 @@ struct MarlinSerial : public HardwareSerial {
       nvic_irq_set_priority(c_dev()->irq_num, UART_IRQ_PRIO);
     }
   #endif
-
-  #if HAS_TFT_LVGL_UI
-    // Hook the serial write method to capture the output of GCode command sent via LCD
-    uint32_t current_wpos;
-    void (*line_callback)(void *, const char * msg);
-    void *user_pointer;
-
-    void set_hook(void (*hook)(void *, const char *), void * that) { line_callback = hook; user_pointer = that; current_wpos = 0; }
-
-    size_t write(uint8_t c) {
-      if (line_callback) {
-        if (c == '\n' || current_wpos == sizeof(public_buf_m) - 1) { // End of line, probably end of command anyway
-          public_buf_m[current_wpos] = 0;
-          line_callback(user_pointer, public_buf_m);
-          current_wpos = 0;
-        }
-        else
-          public_buf_m[current_wpos++] = c;
-      }
-      return HardwareSerial::write(c);
-    }
-  #endif
 };
 
 typedef Serial0Type<MarlinSerial> MSerialT;

Marlin/src/HAL/shared/backtrace/backtrace.cpp

@@ -35,9 +35,9 @@ static bool UnwReportOut(void* ctx, const UnwReport* bte) {
   (*p)++;
 
   SERIAL_CHAR('#'); SERIAL_ECHO(*p); SERIAL_ECHOPGM(" : ");
-  SERIAL_ECHOPGM(bte->name ? bte->name : "unknown"); SERIAL_ECHOPGM("@0x"); SERIAL_PRINT(bte->function, HEX);
+  SERIAL_ECHOPGM(bte->name ? bte->name : "unknown"); SERIAL_ECHOPGM("@0x"); SERIAL_PRINT(bte->function, PrintBase::Hex);
   SERIAL_CHAR('+'); SERIAL_ECHO(bte->address - bte->function);
-  SERIAL_ECHOPGM(" PC:"); SERIAL_PRINT(bte->address,HEX); SERIAL_CHAR('\n');
+  SERIAL_ECHOPGM(" PC:"); SERIAL_PRINT(bte->address, PrintBase::Hex); SERIAL_CHAR('\n');
   return true;
 }
 

Marlin/src/MarlinCore.cpp

@@ -1003,7 +1003,7 @@ void setup() {
     );
   #endif
   SERIAL_ECHO_MSG("Compiled: " __DATE__);
-  SERIAL_ECHO_MSG(STR_FREE_MEMORY, freeMemory(), STR_PLANNER_BUFFER_BYTES, (int)sizeof(block_t) * (BLOCK_BUFFER_SIZE));
+  SERIAL_ECHO_MSG(STR_FREE_MEMORY, freeMemory(), STR_PLANNER_BUFFER_BYTES, sizeof(block_t) * (BLOCK_BUFFER_SIZE));
 
   // Some HAL need precise delay adjustment
   calibrate_delay_loop();

Marlin/src/core/macros.h

@@ -321,6 +321,12 @@
   namespace Private {
     template<bool, typename _Tp = void> struct enable_if { };
     template<typename _Tp>              struct enable_if<true, _Tp> { typedef _Tp type; };
+
+    template<typename T, typename U> struct is_same { enum { value = false }; };
+    template<typename T> struct is_same<T, T> { enum { value = true }; };
+
+    template <typename T, typename ... Args> struct first_type_of { typedef T type; };
+    template <typename T> struct first_type_of<T> { typedef T type; };
   }
   // C++11 solution using SFINAE to detect the existance of a member in a class at compile time.
   // It creates a HasMember<Type> structure containing 'value' set to true if the member exists

Marlin/src/core/serial.cpp

@@ -59,12 +59,14 @@ void serialprintPGM(PGM_P str) {
 void serial_echo_start()  { static PGMSTR(echomagic, "echo:"); serialprintPGM(echomagic); }
 void serial_error_start() { static PGMSTR(errormagic, "Error:"); serialprintPGM(errormagic); }
 
+void serial_echopair_PGM(PGM_P const s_P, serial_char_t v) { serialprintPGM(s_P); SERIAL_CHAR(v.c); }
 void serial_echopair_PGM(PGM_P const s_P, const char *v)   { serialprintPGM(s_P); SERIAL_ECHO(v); }
-void serial_echopair_PGM(PGM_P const s_P, char v)          { serialprintPGM(s_P); SERIAL_CHAR(v); }
+void serial_echopair_PGM(PGM_P const s_P, char v)          { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_PGM(PGM_P const s_P, int v)           { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_PGM(PGM_P const s_P, long v)          { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_PGM(PGM_P const s_P, float v)         { serialprintPGM(s_P); SERIAL_DECIMAL(v); }
 void serial_echopair_PGM(PGM_P const s_P, double v)        { serialprintPGM(s_P); SERIAL_DECIMAL(v); }
+void serial_echopair_PGM(PGM_P const s_P, unsigned char v) { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_PGM(PGM_P const s_P, unsigned int v)  { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_PGM(PGM_P const s_P, unsigned long v) { serialprintPGM(s_P); SERIAL_ECHO(v); }
 

Marlin/src/core/serial.h

@@ -81,37 +81,49 @@ typedef int8_t serial_index_t;
 #define PORT_REDIRECT(p)        _PORT_REDIRECT(1,p)
 #define SERIAL_PORTMASK(P)      _BV(P)
 
-#define SERIAL_ECHO(x)          SERIAL_OUT(print, x)
-#define SERIAL_ECHO_F(V...)     SERIAL_OUT(print, V)
-#define SERIAL_ECHOLN(x)        SERIAL_OUT(println, x)
-#define SERIAL_PRINT(x,b)       SERIAL_OUT(print, x, b)
-#define SERIAL_PRINTLN(x,b)     SERIAL_OUT(println, x, b)
-#define SERIAL_FLUSH()          SERIAL_OUT(flush)
-
-#ifdef ARDUINO_ARCH_STM32
-  #define SERIAL_FLUSHTX()      SERIAL_OUT(flush)
-#elif TX_BUFFER_SIZE > 0
-  #define SERIAL_FLUSHTX()      SERIAL_OUT(flushTX)
-#else
-  #define SERIAL_FLUSHTX()
-#endif
+//
+// SERIAL_CHAR - Print one or more individual chars
+//
+inline void SERIAL_CHAR(char a) { SERIAL_IMPL.write(a); }
+template <typename ... Args>
+void SERIAL_CHAR(char a, Args ... args) { SERIAL_IMPL.write(a); SERIAL_CHAR(args ...); }
+
+/**
+ * SERIAL_ECHO - Print a single string or value.
+ *   Any numeric parameter (including char) is printed as a base-10 number.
+ *   A string pointer or literal will be output as a string.
+ *
+ * NOTE: Use SERIAL_CHAR to print char as a single character.
+ */
+template <typename T>
+void SERIAL_ECHO(T x) { SERIAL_IMPL.print(x); }
+
+// Wrapper for ECHO commands to interpret a char
+typedef struct SerialChar { char c; SerialChar(char n) : c(n) { } } serial_char_t;
+inline void SERIAL_ECHO(serial_char_t x) { SERIAL_IMPL.write(x.c); }
+#define AS_CHAR(C) serial_char_t(C)
+
+// SERIAL_ECHO_F prints a floating point value with optional precision
+inline void SERIAL_ECHO_F(EnsureDouble x, int digit = 2) { SERIAL_IMPL.print(x, digit); }
+
+template <typename T>
+void SERIAL_ECHOLN(T x) { SERIAL_IMPL.println(x); }
 
-// Print up to 10 chars from a list
-#define __CHAR_N(N,V...)  _CHAR_##N(V)
-#define _CHAR_N(N,V...)   __CHAR_N(N,V)
-#define _CHAR_1(c)        SERIAL_OUT(write, c)
-#define _CHAR_2(a,b)      do{ _CHAR_1(a); _CHAR_1(b); }while(0)
-#define _CHAR_3(a,V...)   do{ _CHAR_1(a); _CHAR_2(V); }while(0)
-#define _CHAR_4(a,V...)   do{ _CHAR_1(a); _CHAR_3(V); }while(0)
-#define _CHAR_5(a,V...)   do{ _CHAR_1(a); _CHAR_4(V); }while(0)
-#define _CHAR_6(a,V...)   do{ _CHAR_1(a); _CHAR_5(V); }while(0)
-#define _CHAR_7(a,V...)   do{ _CHAR_1(a); _CHAR_6(V); }while(0)
-#define _CHAR_8(a,V...)   do{ _CHAR_1(a); _CHAR_7(V); }while(0)
-#define _CHAR_9(a,V...)   do{ _CHAR_1(a); _CHAR_8(V); }while(0)
-#define _CHAR_10(a,V...)  do{ _CHAR_1(a); _CHAR_9(V); }while(0)
-
-#define SERIAL_CHAR(V...) _CHAR_N(NUM_ARGS(V),V)
+// SERIAL_PRINT works like SERIAL_ECHO but allow to specify the encoding base of the number printed
+template <typename T, typename U>
+void SERIAL_PRINT(T x, U y) { SERIAL_IMPL.print(x, y); }
 
+template <typename T, typename U>
+void SERIAL_PRINTLN(T x, U y) { SERIAL_IMPL.println(x, y); }
+
+// Flush the serial port
+inline void SERIAL_FLUSH()    { SERIAL_IMPL.flush(); }
+inline void SERIAL_FLUSHTX()  { SERIAL_IMPL.flushTX(); }
+
+// Print a single PROGMEM string to serial
+void serialprintPGM(PGM_P str);
+
+// SERIAL_ECHOPAIR / SERIAL_ECHOPAIR_P is used to output a key value pair. The key must be a string and the value can be anything
 // Print up to 12 pairs of values. Odd elements auto-wrapped in PSTR().
 #define __SEP_N(N,V...)   _SEP_##N(V)
 #define _SEP_N(N,V...)    __SEP_N(N,V)
@@ -170,6 +182,7 @@ typedef int8_t serial_index_t;
 #define _SEP_23_P(a,b,V...) do{ _SEP_2_P(a,b); _SEP_21_P(V); }while(0)
 #define _SEP_24_P(a,b,V...) do{ _SEP_2_P(a,b); _SEP_22_P(V); }while(0)
 
+// SERIAL_ECHOPAIR_P is used to output a key value pair. Unlike SERIAL_ECHOPAIR, the key must be a PGM string already and the value can be anything
 #define SERIAL_ECHOPAIR_P(V...) _SEP_N_P(NUM_ARGS(V),V)
 
 // Print up to 12 pairs of values followed by newline
@@ -244,32 +257,39 @@ typedef int8_t serial_index_t;
 
 #define SERIAL_ECHOLNPAIR_P(V...) _SELP_N_P(NUM_ARGS(V),V)
 
-// Print up to 20 comma-separated pairs of values
-#define __SLST_N(N,V...)   _SLST_##N(V)
-#define _SLST_N(N,V...)    __SLST_N(N,V)
-#define _SLST_1(a)         SERIAL_ECHO(a)
-#define _SLST_2(a,b)       do{ SERIAL_ECHO(a); SERIAL_ECHOPAIR(", ",b);     }while(0)
-#define _SLST_3(a,b,c)     do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_1(c);  }while(0)
-#define _SLST_4(a,b,V...)  do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_2(V);  }while(0)
-#define _SLST_5(a,b,V...)  do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_3(V);  }while(0)
-#define _SLST_6(a,b,V...)  do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_4(V);  }while(0)
-#define _SLST_7(a,b,V...)  do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_5(V);  }while(0)
-#define _SLST_8(a,b,V...)  do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_6(V);  }while(0)
-#define _SLST_9(a,b,V...)  do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_7(V);  }while(0)
-#define _SLST_10(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_8(V);  }while(0)
-#define _SLST_11(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_9(V);  }while(0)
-#define _SLST_12(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_10(V); }while(0)
-#define _SLST_13(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_11(V); }while(0)
-#define _SLST_14(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_12(V); }while(0)
-#define _SLST_15(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_13(V); }while(0)
-#define _SLST_16(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_14(V); }while(0)
-#define _SLST_17(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_15(V); }while(0)
-#define _SLST_18(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_16(V); }while(0)
-#define _SLST_19(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_17(V); }while(0)
-#define _SLST_20(a,b,V...) do{ SERIAL_ECHO(a); _SEP_2(", ",b); _SLST_18(V); }while(0) // Eat two args, pass the rest up
-
-#define SERIAL_ECHOLIST(pre,V...)   do{ SERIAL_ECHOPGM(pre); _SLST_N(NUM_ARGS(V),V); }while(0)
-#define SERIAL_ECHOLIST_N(N,V...)   _SLST_N(N,LIST_N(N,V))
+#ifdef AllowDifferentTypeInList
+
+  inline void SERIAL_ECHOLIST_IMPL() {}
+  template <typename T>
+  void SERIAL_ECHOLIST_IMPL(T && t) { SERIAL_IMPL.print(t); }
+
+  template <typename T, typename ... Args>
+  void SERIAL_ECHOLIST_IMPL(T && t, Args && ... args) {
+    SERIAL_IMPL.print(t);
+    serialprintPGM(PSTR(", "));
+    SERIAL_ECHOLIST_IMPL(args...);
+  }
+
+  template <typename ... Args>
+  void SERIAL_ECHOLIST(PGM_P const str, Args && ... args) {
+    SERIAL_IMPL.print(str);
+    SERIAL_ECHOLIST_IMPL(args...);
+  }
+
+#else // Optimization if the listed type are all the same (seems to be the case in the codebase so use that instead)
+
+  template <typename ... Args>
+  void SERIAL_ECHOLIST(PGM_P const str, Args && ... args) {
+    serialprintPGM(str);
+    typename Private::first_type_of<Args...>::type values[] = { args... };
+    constexpr size_t argsSize = sizeof...(args);
+    for (size_t i = 0; i < argsSize; i++) {
+      if (i) serialprintPGM(PSTR(", "));
+      SERIAL_IMPL.print(values[i]);
+    }
+  }
+
+#endif
 
 #define SERIAL_ECHOPGM_P(P)         (serialprintPGM(P))
 #define SERIAL_ECHOLNPGM_P(P)       (serialprintPGM(P "\n"))
@@ -303,19 +323,19 @@ typedef int8_t serial_index_t;
 //
 // Functions for serial printing from PROGMEM. (Saves loads of SRAM.)
 //
+void serial_echopair_PGM(PGM_P const s_P, serial_char_t v);
 void serial_echopair_PGM(PGM_P const s_P, const char *v);
 void serial_echopair_PGM(PGM_P const s_P, char v);
 void serial_echopair_PGM(PGM_P const s_P, int v);
-void serial_echopair_PGM(PGM_P const s_P, unsigned int v);
 void serial_echopair_PGM(PGM_P const s_P, long v);
-void serial_echopair_PGM(PGM_P const s_P, unsigned long v);
 void serial_echopair_PGM(PGM_P const s_P, float v);
 void serial_echopair_PGM(PGM_P const s_P, double v);
-inline void serial_echopair_PGM(PGM_P const s_P, uint8_t v) { serial_echopair_PGM(s_P, (int)v); }
+void serial_echopair_PGM(PGM_P const s_P, unsigned char v);
+void serial_echopair_PGM(PGM_P const s_P, unsigned int v);
+void serial_echopair_PGM(PGM_P const s_P, unsigned long v);
 inline void serial_echopair_PGM(PGM_P const s_P, bool v)    { serial_echopair_PGM(s_P, (int)v); }
 inline void serial_echopair_PGM(PGM_P const s_P, void *v)   { serial_echopair_PGM(s_P, (uintptr_t)v); }
 
-void serialprintPGM(PGM_P str);
 void serial_echo_start();
 void serial_error_start();
 void serial_ternary(const bool onoff, PGM_P const pre, PGM_P const on, PGM_P const off, PGM_P const post=nullptr);

Marlin/src/core/serial_base.h

@@ -22,25 +22,41 @@
 #pragma once
 
 #include "../inc/MarlinConfigPre.h"
+#include "macros.h"
 
 #if ENABLED(EMERGENCY_PARSER)
   #include "../feature/e_parser.h"
 #endif
 
-#ifndef DEC
-  #define DEC 10
-  #define HEX 16
-  #define OCT 8
-  #define BIN 2
-#endif
-
 // flushTX is not implemented in all HAL, so use SFINAE to call the method where it is.
 CALL_IF_EXISTS_IMPL(void, flushTX );
 CALL_IF_EXISTS_IMPL(bool, connected, true);
 
+// In order to catch usage errors in code, we make the base to encode number explicit
+// If given a number (and not this enum), the compiler will reject the overload, falling back to the (double, digit) version
+// We don't want hidden conversion of the first parameter to double, so it has to be as hard to do for the compiler as creating this enum
+enum class PrintBase {
+  Dec = 10,
+  Hex = 16,
+  Oct = 8,
+  Bin = 2
+};
+
+// A simple forward struct that prevent the compiler to select print(double, int) as a default overload for any type different than 
+// double or float. For double or float, a conversion exists so the call will be transparent
+struct EnsureDouble {
+  double a;
+  FORCE_INLINE operator double() { return a; }
+  // If the compiler breaks on ambiguity here, it's likely because you're calling print(X, base) with X not a double or a float, and a
+  // base that's not one of PrintBase's value. This exact code is made to detect such error, you NEED to set a base explicitely like this:
+  // SERIAL_PRINT(v, PrintBase::Hex) 
+  FORCE_INLINE EnsureDouble(double a) : a(a) {}
+  FORCE_INLINE EnsureDouble(float a) : a(a) {}
+};
+
 // Using Curiously Recurring Template Pattern here to avoid virtual table cost when compiling.
-// Since the real serial class is known at compile time, this results in compiler writing a completely
-// efficient code
+// Since the real serial class is known at compile time, this results in the compiler writing
+// a completely efficient code.
 template <class Child>
 struct SerialBase {
   #if ENABLED(EMERGENCY_PARSER)
@@ -78,39 +94,47 @@ struct SerialBase {
   FORCE_INLINE void write(const char* str)                    { while (*str) write(*str++); }
   FORCE_INLINE void write(const uint8_t* buffer, size_t size) { while (size--) write(*buffer++); }
   FORCE_INLINE void print(const char* str)                    { write(str); }
-  NO_INLINE void print(char c, int base = 0)              { print((long)c, base); }
-  NO_INLINE void print(unsigned char c, int base = 0)     { print((unsigned long)c, base); }
-  NO_INLINE void print(int c, int base = DEC)             { print((long)c, base); }
-  NO_INLINE void print(unsigned int c, int base = DEC)    { print((unsigned long)c, base); }
-  void print(unsigned long c, int base = DEC)             { printNumber(c, base); }
-  void print(double c, int digits = 2)                    { printFloat(c, digits); }
-  void print(long c, int base = DEC)                      {
-    if (!base) {
-      write(c);
-      return;
-    }
-    if (base == DEC && c < 0) {
-      write((uint8_t)'-'); c = -c;
-    }
-    printNumber(c, base);
-  }
+  // No default argument to avoid ambiguity
+  NO_INLINE void print(char c, PrintBase base)                { printNumber((signed long)c, (uint8_t)base); }
+  NO_INLINE void print(unsigned char c, PrintBase base)       { printNumber((unsigned long)c, (uint8_t)base); }
+  NO_INLINE void print(int c, PrintBase base)                 { printNumber((signed long)c, (uint8_t)base); }
+  NO_INLINE void print(unsigned int c, PrintBase base)        { printNumber((unsigned long)c, (uint8_t)base); }
+  void print(unsigned long c, PrintBase base)                 { printNumber((unsigned long)c, (uint8_t)base); }
+  void print(long c, PrintBase base)                          { printNumber((signed long)c, (uint8_t)base); }
+  void print(EnsureDouble c, int digits)                      { printFloat(c, digits); }
+
+  // Forward the call to the former's method
+  FORCE_INLINE void print(char c)                { print(c, PrintBase::Dec); }
+  FORCE_INLINE void print(unsigned char c)       { print(c, PrintBase::Dec); }
+  FORCE_INLINE void print(int c)                 { print(c, PrintBase::Dec); }
+  FORCE_INLINE void print(unsigned int c)        { print(c, PrintBase::Dec); }
+  FORCE_INLINE void print(unsigned long c)       { print(c, PrintBase::Dec); }
+  FORCE_INLINE void print(long c)                { print(c, PrintBase::Dec); }
+  FORCE_INLINE void print(double c)              { print(c, 2); }
 
-  NO_INLINE void println(const char s[])                  { print(s); println(); }
-  NO_INLINE void println(char c, int base = 0)            { print(c, base); println(); }
-  NO_INLINE void println(unsigned char c, int base = 0)   { print(c, base); println(); }
-  NO_INLINE void println(int c, int base = DEC)           { print(c, base); println(); }
-  NO_INLINE void println(unsigned int c, int base = DEC)  { print(c, base); println(); }
-  NO_INLINE void println(long c, int base = DEC)          { print(c, base); println(); }
-  NO_INLINE void println(unsigned long c, int base = DEC) { print(c, base); println(); }
-  NO_INLINE void println(double c, int digits = 2)        { print(c, digits); println(); }
-  NO_INLINE void println()                                { write('\r'); write('\n'); }
+  FORCE_INLINE void println(const char s[])                  { print(s); println(); }
+  FORCE_INLINE void println(char c, PrintBase base)          { print(c, base); println(); }
+  FORCE_INLINE void println(unsigned char c, PrintBase base) { print(c, base); println(); }
+  FORCE_INLINE void println(int c, PrintBase base)           { print(c, base); println(); }
+  FORCE_INLINE void println(unsigned int c, PrintBase base)  { print(c, base); println(); }
+  FORCE_INLINE void println(long c, PrintBase base)          { print(c, base); println(); }
+  FORCE_INLINE void println(unsigned long c, PrintBase base) { print(c, base); println(); }
+  FORCE_INLINE void println(double c, int digits)            { print(c, digits); println(); }
+  FORCE_INLINE void println()                                { write('\r'); write('\n'); }
+
+  // Forward the call to the former's method
+  FORCE_INLINE void println(char c)                { println(c, PrintBase::Dec); }
+  FORCE_INLINE void println(unsigned char c)       { println(c, PrintBase::Dec); }
+  FORCE_INLINE void println(int c)                 { println(c, PrintBase::Dec); }
+  FORCE_INLINE void println(unsigned int c)        { println(c, PrintBase::Dec); }
+  FORCE_INLINE void println(unsigned long c)       { println(c, PrintBase::Dec); }
+  FORCE_INLINE void println(long c)                { println(c, PrintBase::Dec); }
+  FORCE_INLINE void println(double c)              { println(c, 2); }
 
   // Print a number with the given base
-  void printNumber(unsigned long n, const uint8_t base) {
-    if (!base) {
-      write((uint8_t)n);
-      return;
-    }
+  NO_INLINE void printNumber(unsigned long n, const uint8_t base) {
+    if (!base) return; // Hopefully, this should raise visible bug immediately
+
     if (n) {
       unsigned char buf[8 * sizeof(long)]; // Enough space for base 2
       int8_t i = 0;
@@ -122,9 +146,19 @@ struct SerialBase {
     }
     else write('0');
   }
+  void printNumber(signed long n, const uint8_t base) {
+    if (base == 10 && n < 0) { 
+      n = -n; // This works because all platforms Marlin's builds on are using 2-complement encoding for negative number
+              // On such CPU, changing the sign of a number is done by inverting the bits and adding one, so if n = 0x80000000 = -2147483648 then
+              // -n = 0x7FFFFFFF + 1 => 0x80000000 = 2147483648 (if interpreted as unsigned) or -2147483648 if interpreted as signed.
+              // On non 2-complement CPU, there would be no possible representation for 2147483648.
+      write('-'); 
+    } 
+    printNumber((unsigned long)n , base);
+  }
 
   // Print a decimal number
-  void printFloat(double number, uint8_t digits) {
+  NO_INLINE void printFloat(double number, uint8_t digits) {
     // Handle negative numbers
     if (number < 0.0) {
       write('-');
@@ -147,7 +181,7 @@ struct SerialBase {
       // Extract digits from the remainder one at a time
       while (digits--) {
         remainder *= 10.0;
-        int toPrint = int(remainder);
+        unsigned long toPrint = (unsigned long)remainder;
         printNumber(toPrint, 10);
         remainder -= toPrint;
       }
@@ -155,5 +189,5 @@ struct SerialBase {
   }
 };
 
-// All serial instances will be built by chaining the features required for the function in a form of a template
-// type definition
+// All serial instances will be built by chaining the features required
+// for the function in the form of a template type definition.

Marlin/src/core/serial_hook.h

@@ -21,6 +21,7 @@
  */
 #pragma once
 
+#include "macros.h"
 #include "serial_base.h"
 
 // The most basic serial class: it dispatch to the base serial class with no hook whatsoever. This will compile to nothing but the base serial class
@@ -37,6 +38,8 @@ struct BaseSerial : public SerialBase< BaseSerial<SerialT> >, public SerialT {
   bool available(uint8_t index) { return index == 0 && SerialT::available(); }
   int read(uint8_t index)       { return index == 0 ? SerialT::read() : -1; }
   bool connected()              { return CALL_IF_EXISTS(bool, static_cast<SerialT*>(this), connected);; }
+  void flushTX()                { CALL_IF_EXISTS(void, static_cast<SerialT*>(this), flushTX); }
+
   // We have 2 implementation of the same method in both base class, let's say which one we want
   using SerialT::available;
   using SerialT::read;
@@ -68,6 +71,7 @@ struct ConditionalSerial : public SerialBase< ConditionalSerial<SerialT> > {
 
   void msgDone() {}
   bool connected()              { return CALL_IF_EXISTS(bool, &out, connected); }
+  void flushTX()                { CALL_IF_EXISTS(void, &out, flushTX); }
 
   bool available(uint8_t index) { return index == 0 && out.available(); }
   int read(uint8_t index)       { return index == 0 ? out.read() : -1; }
@@ -91,6 +95,7 @@ struct ForwardSerial : public SerialBase< ForwardSerial<SerialT> > {
   void msgDone() {}
   // Existing instances implement Arduino's operator bool, so use that if it's available
   bool connected()              { return Private::HasMember_connected<SerialT>::value ? CALL_IF_EXISTS(bool, &out, connected) : (bool)out; }
+  void flushTX()                { CALL_IF_EXISTS(void, &out, flushTX); }
 
   bool available(uint8_t index) { return index == 0 && out.available(); }
   int read(uint8_t index)       { return index == 0 ? out.read() : -1; }
@@ -131,11 +136,11 @@ struct RuntimeSerial : public SerialBase< RuntimeSerial<SerialT> >, public Seria
   using BaseClassT::print;
   using BaseClassT::println;
 
-
   // Underlying implementation might use Arduino's bool operator
   bool connected() {
     return Private::HasMember_connected<SerialT>::value ? CALL_IF_EXISTS(bool, static_cast<SerialT*>(this), connected) : static_cast<SerialT*>(this)->operator bool();
   }
+  void flushTX()                { CALL_IF_EXISTS(void, static_cast<SerialT*>(this), flushTX); }
 
   void setHook(WriteHook writeHook = 0, EndOfMessageHook eofHook = 0, void * userPointer = 0) {
     // Order is important here as serial code can be called inside interrupts

Marlin/src/feature/bedlevel/abl/abl.cpp

@@ -47,11 +47,11 @@ static void extrapolate_one_point(const uint8_t x, const uint8_t y, const int8_t
   if (DEBUGGING(LEVELING)) {
     DEBUG_ECHOPGM("Extrapolate [");
     if (x < 10) DEBUG_CHAR(' ');
-    DEBUG_ECHO((int)x);
+    DEBUG_ECHO(x);
     DEBUG_CHAR(xdir ? (xdir > 0 ? '+' : '-') : ' ');
     DEBUG_CHAR(' ');
     if (y < 10) DEBUG_CHAR(' ');
-    DEBUG_ECHO((int)y);
+    DEBUG_ECHO(y);
     DEBUG_CHAR(ydir ? (ydir > 0 ? '+' : '-') : ' ');
     DEBUG_ECHOLNPGM("]");
   }

Marlin/src/feature/bedlevel/bedlevel.cpp

@@ -160,7 +160,7 @@ void reset_bed_level() {
     #ifndef SCAD_MESH_OUTPUT
       LOOP_L_N(x, sx) {
         serial_spaces(precision + (x < 10 ? 3 : 2));
-        SERIAL_ECHO(int(x));
+        SERIAL_ECHO(x);
       }
       SERIAL_EOL();
     #endif
@@ -172,7 +172,7 @@ void reset_bed_level() {
         SERIAL_ECHOPGM(" [");             // open sub-array
       #else
         if (y < 10) SERIAL_CHAR(' ');
-        SERIAL_ECHO(int(y));
+        SERIAL_ECHO(y);
       #endif
       LOOP_L_N(x, sx) {
         SERIAL_CHAR(' ');

Marlin/src/feature/bedlevel/ubl/ubl.cpp

@@ -50,7 +50,7 @@
     GRID_LOOP(x, y)
       if (!isnan(z_values[x][y])) {
         SERIAL_ECHO_START();
-        SERIAL_ECHOPAIR("  M421 I", int(x), " J", int(y));
+        SERIAL_ECHOPAIR("  M421 I", x, " J", y);
         SERIAL_ECHOLNPAIR_F_P(SP_Z_STR, z_values[x][y], 4);
         serial_delay(75); // Prevent Printrun from exploding
       }
@@ -150,7 +150,7 @@
     SERIAL_ECHO_SP(7);
     LOOP_L_N(i, GRID_MAX_POINTS_X) {
       if (i < 10) SERIAL_CHAR(' ');
-      SERIAL_ECHO((int)i);
+      SERIAL_ECHO(i);
       SERIAL_ECHO_SP(sp);
     }
     serial_delay(10);

Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp

@@ -742,7 +742,7 @@
         if (do_ubl_mesh_map) display_map(g29_map_type);
 
         const int point_num = (GRID_MAX_POINTS) - count + 1;
-        SERIAL_ECHOLNPAIR("Probing mesh point ", point_num, "/", int(GRID_MAX_POINTS), ".");
+        SERIAL_ECHOLNPAIR("Probing mesh point ", point_num, "/", GRID_MAX_POINTS, ".");
         TERN_(HAS_DISPLAY, ui.status_printf_P(0, PSTR(S_FMT " %i/%i"), GET_TEXT(MSG_PROBING_MESH), point_num, int(GRID_MAX_POINTS)));
 
         #if HAS_LCD_MENU
@@ -1694,7 +1694,7 @@
       SERIAL_EOL();
 
       #if HAS_KILL
-        SERIAL_ECHOLNPAIR("Kill pin on :", int(KILL_PIN), "  state:", int(kill_state()));
+        SERIAL_ECHOLNPAIR("Kill pin on :", KILL_PIN, "  state:", kill_state());
       #endif
 
       SERIAL_EOL();
@@ -1707,8 +1707,8 @@
         SERIAL_ECHOLNPAIR("Meshes go from ", hex_address((void*)settings.meshes_start_index()), " to ", hex_address((void*)settings.meshes_end_index()));
         serial_delay(50);
 
-        SERIAL_ECHOLNPAIR("sizeof(ubl) :  ", (int)sizeof(ubl));         SERIAL_EOL();
-        SERIAL_ECHOLNPAIR("z_value[][] size: ", (int)sizeof(z_values)); SERIAL_EOL();
+        SERIAL_ECHOLNPAIR("sizeof(ubl) :  ", sizeof(ubl));         SERIAL_EOL();
+        SERIAL_ECHOLNPAIR("z_value[][] size: ", sizeof(z_values)); SERIAL_EOL();
         serial_delay(25);
 
         SERIAL_ECHOLNPAIR("EEPROM free for UBL: ", hex_address((void*)(settings.meshes_end_index() - settings.meshes_start_index())));

Marlin/src/feature/binary_stream.h

@@ -404,7 +404,7 @@ public:
           if (packet_retries < MAX_RETRIES || MAX_RETRIES == 0) {
             packet_retries++;
             stream_state = StreamState::PACKET_RESET;
-            SERIAL_ECHO_MSG("Resend request ", int(packet_retries));
+            SERIAL_ECHO_MSG("Resend request ", packet_retries);
             SERIAL_ECHOLNPAIR("rs", sync);
           }
           else

Marlin/src/feature/bltouch.cpp

@@ -64,7 +64,7 @@ void BLTouch::init(const bool set_voltage/*=false*/) {
   #else
 
     if (DEBUGGING(LEVELING)) {
-      DEBUG_ECHOLNPAIR("last_written_mode - ", (int)last_written_mode);
+      DEBUG_ECHOLNPAIR("last_written_mode - ", last_written_mode);
       DEBUG_ECHOLNPGM("config mode - "
         #if ENABLED(BLTOUCH_SET_5V_MODE)
           "BLTOUCH_SET_5V_MODE"
@@ -175,7 +175,7 @@ bool BLTouch::status_proc() {
   _set_SW_mode();              // Incidentally, _set_SW_mode() will also RESET any active alarm
   const bool tr = triggered(); // If triggered in SW mode, the pin is up, it is STOWED
 
-  if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("BLTouch is ", (int)tr);
+  if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("BLTouch is ", tr);
 
   if (tr) _stow(); else _deploy();  // Turn off SW mode, reset any trigger, honor pin state
   return !tr;
@@ -187,7 +187,7 @@ void BLTouch::mode_conv_proc(const bool M5V) {
    * BLTOUCH V3.0: This will set the mode (twice) and sadly, a STOW is needed at the end, because of the deploy
    * BLTOUCH V3.1: This will set the mode and store it in the eeprom. The STOW is not needed but does not hurt
    */
-  if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("BLTouch Set Mode - ", (int)M5V);
+  if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("BLTouch Set Mode - ", M5V);
   _deploy();
   if (M5V) _set_5V_mode(); else _set_OD_mode();
   _mode_store();

Marlin/src/feature/cancel_object.cpp

@@ -66,9 +66,8 @@ void CancelObject::uncancel_object(const int8_t obj) {
 }
 
 void CancelObject::report() {
-  if (active_object >= 0) {
-    SERIAL_ECHO_MSG("Active Object: ", int(active_object));
-  }
+  if (active_object >= 0)
+    SERIAL_ECHO_MSG("Active Object: ", active_object);
 
   if (canceled) {
     SERIAL_ECHO_START();

Marlin/src/feature/encoder_i2c.cpp

@@ -49,7 +49,7 @@ void I2CPositionEncoder::init(const uint8_t address, const AxisEnum axis) {
 
   initialized++;
 
-  SERIAL_ECHOLNPAIR("Setting up encoder on ", axis_codes[encoderAxis], " axis, addr = ", address);
+  SERIAL_ECHOLNPAIR("Setting up encoder on ", AS_CHAR(axis_codes[encoderAxis]), " axis, addr = ", address);
 
   position = get_position();
 }
@@ -67,7 +67,7 @@ void I2CPositionEncoder::update() {
     /*
     if (trusted) { //commented out as part of the note below
       trusted = false;
-      SERIAL_ECHOLMPAIR("Fault detected on ", axis_codes[encoderAxis], " axis encoder. Disengaging error correction until module is trusted again.");
+      SERIAL_ECHOLNPAIR("Fault detected on ", AS_CHAR(axis_codes[encoderAxis]), " axis encoder. Disengaging error correction until module is trusted again.");
     }
     */
     return;
@@ -92,7 +92,7 @@ void I2CPositionEncoder::update() {
       if (millis() - lastErrorTime > I2CPE_TIME_TRUSTED) {
         trusted = true;
 
-        SERIAL_ECHOLNPAIR("Untrusted encoder module on ", axis_codes[encoderAxis], " axis has been fault-free for set duration, reinstating error correction.");
+        SERIAL_ECHOLNPAIR("Untrusted encoder module on ", AS_CHAR(axis_codes[encoderAxis]), " axis has been fault-free for set duration, reinstating error correction.");
 
         //the encoder likely lost its place when the error occured, so we'll reset and use the printer's
         //idea of where it the axis is to re-initialize
@@ -193,7 +193,7 @@ void I2CPositionEncoder::update() {
       const millis_t ms = millis();
       if (ELAPSED(ms, nextErrorCountTime)) {
         SERIAL_CHAR(axis_codes[encoderAxis]);
-        SERIAL_ECHOLNPAIR(" : LARGE ERR ", int(error), "; diffSum=", diffSum);
+        SERIAL_ECHOLNPAIR(" : LARGE ERR ", error, "; diffSum=", diffSum);
         errorCount++;
         nextErrorCountTime = ms + I2CPE_ERR_CNT_DEBOUNCE_MS;
       }

Marlin/src/feature/encoder_i2c.h

@@ -261,32 +261,32 @@ class I2CPositionEncodersMgr {
 
     static void report_error_count(const int8_t idx, const AxisEnum axis) {
       CHECK_IDX();
-      SERIAL_ECHOLNPAIR("Error count on ", axis_codes[axis], " axis is ", encoders[idx].get_error_count());
+      SERIAL_ECHOLNPAIR("Error count on ", AS_CHAR(axis_codes[axis]), " axis is ", encoders[idx].get_error_count());
     }
 
     static void reset_error_count(const int8_t idx, const AxisEnum axis) {
       CHECK_IDX();
       encoders[idx].set_error_count(0);
-      SERIAL_ECHOLNPAIR("Error count on ", axis_codes[axis], " axis has been reset.");
+      SERIAL_ECHOLNPAIR("Error count on ", AS_CHAR(axis_codes[axis]), " axis has been reset.");
     }
 
     static void enable_ec(const int8_t idx, const bool enabled, const AxisEnum axis) {
       CHECK_IDX();
       encoders[idx].set_ec_enabled(enabled);
-      SERIAL_ECHOPAIR("Error correction on ", axis_codes[axis]);
+      SERIAL_ECHOPAIR("Error correction on ", AS_CHAR(axis_codes[axis]));
       SERIAL_ECHO_TERNARY(encoders[idx].get_ec_enabled(), " axis is ", "en", "dis", "abled.\n");
     }
 
     static void set_ec_threshold(const int8_t idx, const float newThreshold, const AxisEnum axis) {
       CHECK_IDX();
       encoders[idx].set_ec_threshold(newThreshold);
-      SERIAL_ECHOLNPAIR("Error correct threshold for ", axis_codes[axis], " axis set to ", newThreshold, "mm.");
+      SERIAL_ECHOLNPAIR("Error correct threshold for ", AS_CHAR(axis_codes[axis]), " axis set to ", newThreshold, "mm.");
     }
 
     static void get_ec_threshold(const int8_t idx, const AxisEnum axis) {
       CHECK_IDX();
       const float threshold = encoders[idx].get_ec_threshold();
-      SERIAL_ECHOLNPAIR("Error correct threshold for ", axis_codes[axis], " axis is ", threshold, "mm.");
+      SERIAL_ECHOLNPAIR("Error correct threshold for ", AS_CHAR(axis_codes[axis]), " axis is ", threshold, "mm.");
     }
 
     static int8_t idx_from_axis(const AxisEnum axis) {

Marlin/src/feature/mixing.cpp

@@ -135,11 +135,11 @@ void Mixer::refresh_collector(const float proportion/*=1.0*/, const uint8_t t/*=
     cmax = _MAX(cmax, v);
     csum += v;
   }
-  //SERIAL_ECHOPAIR("Mixer::refresh_collector(", proportion, ", ", int(t), ") cmax=", cmax, "  csum=", csum, "  color");
+  //SERIAL_ECHOPAIR("Mixer::refresh_collector(", proportion, ", ", t, ") cmax=", cmax, "  csum=", csum, "  color");
   const float inv_prop = proportion / csum;
   MIXER_STEPPER_LOOP(i) {
     c[i] = color[t][i] * inv_prop;
-    //SERIAL_ECHOPAIR(" [", int(t), "][", int(i), "] = ", int(color[t][i]), " (", c[i], ")  ");
+    //SERIAL_ECHOPAIR(" [", t, "][", i, "] = ", color[t][i], " (", c[i], ")  ");
   }
   //SERIAL_EOL();
 }

Marlin/src/feature/mixing.h

@@ -139,9 +139,9 @@ class Mixer {
 
       #ifdef MIXER_NORMALIZER_DEBUG
         SERIAL_ECHOPGM("Mix [ ");
-        SERIAL_ECHOLIST_N(MIXING_STEPPERS, int(mix[0]), int(mix[1]), int(mix[2]), int(mix[3]), int(mix[4]), int(mix[5]));
+        SERIAL_ECHOLIST_N(MIXING_STEPPERS, mix[0], mix[1], mix[2], mix[3], mix[4], mix[5]);
         SERIAL_ECHOPGM(" ] to Color [ ");
-        SERIAL_ECHOLIST_N(MIXING_STEPPERS, int(tcolor[0]), int(tcolor[1]), int(tcolor[2]), int(tcolor[3]), int(tcolor[4]), int(tcolor[5]));
+        SERIAL_ECHOLIST_N(MIXING_STEPPERS, tcolor[0], tcolor[1], tcolor[2], tcolor[3], tcolor[4], tcolor[5]);
         SERIAL_ECHOLNPGM(" ]");
       #endif
     }
@@ -153,10 +153,10 @@ class Mixer {
       MIXER_STEPPER_LOOP(i) mix[i] = mixer_perc_t(100.0f * color[j][i] / ctot);
 
       #ifdef MIXER_NORMALIZER_DEBUG
-        SERIAL_ECHOPAIR("V-tool ", int(j), " [ ");
-        SERIAL_ECHOLIST_N(MIXING_STEPPERS, int(color[j][0]), int(color[j][1]), int(color[j][2]), int(color[j][3]), int(color[j][4]), int(color[j][5]));
+        SERIAL_ECHOPAIR("V-tool ", j, " [ ");
+        SERIAL_ECHOLIST_N(MIXING_STEPPERS, color[j][0], color[j][1], color[j][2], color[j][3], color[j][4], color[j][5]);
         SERIAL_ECHOPGM(" ] to Mix [ ");
-        SERIAL_ECHOLIST_N(MIXING_STEPPERS, int(mix[0]), int(mix[1]), int(mix[2]), int(mix[3]), int(mix[4]), int(mix[5]));
+        SERIAL_ECHOLIST_N(MIXING_STEPPERS, mix[0], mix[1], mix[2], mix[3], mix[4], mix[5]);
         SERIAL_ECHOLNPGM(" ]");
       #endif
     }
@@ -199,9 +199,9 @@ class Mixer {
 
       #ifdef MIXER_NORMALIZER_DEBUG
         SERIAL_ECHOPGM("Gradient [ ");
-        SERIAL_ECHOLIST_N(MIXING_STEPPERS, int(gradient.color[0]), int(gradient.color[1]), int(gradient.color[2]), int(gradient.color[3]), int(gradient.color[4]), int(gradient.color[5]));
+        SERIAL_ECHOLIST_N(MIXING_STEPPERS, gradient.color[0], gradient.color[1], gradient.color[2], gradient.color[3], gradient.color[4], gradient.color[5]);
         SERIAL_ECHOPGM(" ] to Mix [ ");
-        SERIAL_ECHOLIST_N(MIXING_STEPPERS, int(mix[0]), int(mix[1]), int(mix[2]), int(mix[3]), int(mix[4]), int(mix[5]));
+        SERIAL_ECHOLIST_N(MIXING_STEPPERS, mix[0], mix[1], mix[2], mix[3], mix[4], mix[5]);
         SERIAL_ECHOLNPGM(" ]");
       #endif
     }

Marlin/src/feature/mmu/mmu2.cpp

@@ -514,7 +514,7 @@ static void mmu2_not_responding() {
         extruder = index; // filament change is finished
         active_extruder = 0;
         ENABLE_AXIS_E0();
-        SERIAL_ECHO_MSG(STR_ACTIVE_EXTRUDER, int(extruder));
+        SERIAL_ECHO_MSG(STR_ACTIVE_EXTRUDER, extruder);
       }
       ui.reset_status();
     }
@@ -601,7 +601,7 @@ static void mmu2_not_responding() {
       active_extruder = 0;
 
       ENABLE_AXIS_E0();
-      SERIAL_ECHO_MSG(STR_ACTIVE_EXTRUDER, int(extruder));
+      SERIAL_ECHO_MSG(STR_ACTIVE_EXTRUDER, extruder);
 
       ui.reset_status();
     }
@@ -696,7 +696,7 @@ static void mmu2_not_responding() {
       extruder = index; //filament change is finished
       active_extruder = 0;
       ENABLE_AXIS_E0();
-      SERIAL_ECHO_MSG(STR_ACTIVE_EXTRUDER, int(extruder));
+      SERIAL_ECHO_MSG(STR_ACTIVE_EXTRUDER, extruder);
       ui.reset_status();
     }
 

Marlin/src/feature/pause.cpp

@@ -130,7 +130,7 @@ fil_change_settings_t fc_settings[EXTRUDERS];
  */
 static bool ensure_safe_temperature(const bool wait=true, const PauseMode mode=PAUSE_MODE_SAME) {
   DEBUG_SECTION(est, "ensure_safe_temperature", true);
-  DEBUG_ECHOLNPAIR("... wait:", int(wait), " mode:", int(mode));
+  DEBUG_ECHOLNPAIR("... wait:", wait, " mode:", mode);
 
   #if ENABLED(PREVENT_COLD_EXTRUSION)
     if (!DEBUGGING(DRYRUN) && thermalManager.targetTooColdToExtrude(active_extruder))
@@ -176,7 +176,7 @@ bool load_filament(const float &slow_load_length/*=0*/, const float &fast_load_l
                    DXC_ARGS
 ) {
   DEBUG_SECTION(lf, "load_filament", true);
-  DEBUG_ECHOLNPAIR("... slowlen:", slow_load_length, " fastlen:", fast_load_length, " purgelen:", purge_length, " maxbeep:", int(max_beep_count), " showlcd:", int(show_lcd), " pauseforuser:", int(pause_for_user), " pausemode:", int(mode) DXC_SAY);
+  DEBUG_ECHOLNPAIR("... slowlen:", slow_load_length, " fastlen:", fast_load_length, " purgelen:", purge_length, " maxbeep:", max_beep_count, " showlcd:", show_lcd, " pauseforuser:", pause_for_user, " pausemode:", mode DXC_SAY);
 
   if (!ensure_safe_temperature(false, mode)) {
     if (show_lcd) ui.pause_show_message(PAUSE_MESSAGE_STATUS, mode);
@@ -309,7 +309,7 @@ bool unload_filament(const float &unload_length, const bool show_lcd/*=false*/,
                      #endif
 ) {
   DEBUG_SECTION(uf, "unload_filament", true);
-  DEBUG_ECHOLNPAIR("... unloadlen:", unload_length, " showlcd:", int(show_lcd), " mode:", int(mode)
+  DEBUG_ECHOLNPAIR("... unloadlen:", unload_length, " showlcd:", show_lcd, " mode:", mode
     #if BOTH(FILAMENT_UNLOAD_ALL_EXTRUDERS, MIXING_EXTRUDER)
       , " mixmult:", mix_multiplier
     #endif
@@ -373,7 +373,7 @@ uint8_t did_pause_print = 0;
 
 bool pause_print(const float &retract, const xyz_pos_t &park_point, const float &unload_length/*=0*/, const bool show_lcd/*=false*/ DXC_ARGS) {
   DEBUG_SECTION(pp, "pause_print", true);
-  DEBUG_ECHOLNPAIR("... park.x:", park_point.x, " y:", park_point.y, " z:", park_point.z, " unloadlen:", unload_length, " showlcd:", int(show_lcd) DXC_SAY);
+  DEBUG_ECHOLNPAIR("... park.x:", park_point.x, " y:", park_point.y, " z:", park_point.z, " unloadlen:", unload_length, " showlcd:", show_lcd DXC_SAY);
 
   UNUSED(show_lcd);
 
@@ -456,7 +456,7 @@ bool pause_print(const float &retract, const xyz_pos_t &park_point, const float
 
 void show_continue_prompt(const bool is_reload) {
   DEBUG_SECTION(scp, "pause_print", true);
-  DEBUG_ECHOLNPAIR("... is_reload:", int(is_reload));
+  DEBUG_ECHOLNPAIR("... is_reload:", is_reload);
 
   ui.pause_show_message(is_reload ? PAUSE_MESSAGE_INSERT : PAUSE_MESSAGE_WAITING);
   SERIAL_ECHO_START();
@@ -465,7 +465,7 @@ void show_continue_prompt(const bool is_reload) {
 
 void wait_for_confirmation(const bool is_reload/*=false*/, const int8_t max_beep_count/*=0*/ DXC_ARGS) {
   DEBUG_SECTION(wfc, "wait_for_confirmation", true);
-  DEBUG_ECHOLNPAIR("... is_reload:", is_reload, " maxbeep:", int(max_beep_count) DXC_SAY);
+  DEBUG_ECHOLNPAIR("... is_reload:", is_reload, " maxbeep:", max_beep_count DXC_SAY);
 
   bool nozzle_timed_out = false;
 
@@ -561,7 +561,7 @@ void wait_for_confirmation(const bool is_reload/*=false*/, const int8_t max_beep
  */
 void resume_print(const float &slow_load_length/*=0*/, const float &fast_load_length/*=0*/, const float &purge_length/*=ADVANCED_PAUSE_PURGE_LENGTH*/, const int8_t max_beep_count/*=0*/, int16_t targetTemp/*=0*/ DXC_ARGS) {
   DEBUG_SECTION(rp, "resume_print", true);
-  DEBUG_ECHOLNPAIR("... slowlen:", slow_load_length, " fastlen:", fast_load_length, " purgelen:", purge_length, " maxbeep:", int(max_beep_count), " targetTemp:", targetTemp DXC_SAY);
+  DEBUG_ECHOLNPAIR("... slowlen:", slow_load_length, " fastlen:", fast_load_length, " purgelen:", purge_length, " maxbeep:", max_beep_count, " targetTemp:", targetTemp DXC_SAY);
 
   /*
   SERIAL_ECHOLNPAIR(

Marlin/src/feature/powerloss.cpp

@@ -532,7 +532,7 @@ void PrintJobRecovery::resume() {
 
   void PrintJobRecovery::debug(PGM_P const prefix) {
     DEBUG_PRINT_P(prefix);
-    DEBUG_ECHOLNPAIR(" Job Recovery Info...\nvalid_head:", int(info.valid_head), " valid_foot:", int(info.valid_foot));
+    DEBUG_ECHOLNPAIR(" Job Recovery Info...\nvalid_head:", info.valid_head, " valid_foot:", info.valid_foot);
     if (info.valid_head) {
       if (info.valid_head == info.valid_foot) {
         DEBUG_ECHOPGM("current_position: ");
@@ -565,7 +565,7 @@ void PrintJobRecovery::resume() {
         DEBUG_ECHOLNPAIR("feedrate: ", info.feedrate);
 
         #if HAS_MULTI_EXTRUDER
-          DEBUG_ECHOLNPAIR("active_extruder: ", int(info.active_extruder));
+          DEBUG_ECHOLNPAIR("active_extruder: ", info.active_extruder);
         #endif
 
         #if HAS_HOTEND
@@ -584,14 +584,14 @@ void PrintJobRecovery::resume() {
         #if HAS_FAN
           DEBUG_ECHOPGM("fan_speed: ");
           FANS_LOOP(i) {
-            DEBUG_ECHO(int(info.fan_speed[i]));
+            DEBUG_ECHO(info.fan_speed[i]);
             if (i < FAN_COUNT - 1) DEBUG_CHAR(',');
           }
           DEBUG_EOL();
         #endif
 
         #if HAS_LEVELING
-          DEBUG_ECHOLNPAIR("leveling: ", int(info.flag.leveling), " fade: ", info.fade);
+          DEBUG_ECHOLNPAIR("leveling: ", info.flag.leveling, " fade: ", info.fade);
         #endif
         #if ENABLED(FWRETRACT)
           DEBUG_ECHOPGM("retract: ");
@@ -605,8 +605,8 @@ void PrintJobRecovery::resume() {
         DEBUG_ECHOLNPAIR("sd_filename: ", info.sd_filename);
         DEBUG_ECHOLNPAIR("sdpos: ", info.sdpos);
         DEBUG_ECHOLNPAIR("print_job_elapsed: ", info.print_job_elapsed);
-        DEBUG_ECHOLNPAIR("dryrun: ", int(info.flag.dryrun));
-        DEBUG_ECHOLNPAIR("allow_cold_extrusion: ", int(info.flag.allow_cold_extrusion));
+        DEBUG_ECHOLNPAIR("dryrun: ", info.flag.dryrun);
+        DEBUG_ECHOLNPAIR("allow_cold_extrusion: ", info.flag.allow_cold_extrusion);
       }
       else
         DEBUG_ECHOLNPGM("INVALID DATA");

Marlin/src/feature/repeat.cpp

@@ -43,7 +43,7 @@ void Repeat::add_marker(const uint32_t sdpos, const uint16_t count) {
     marker[index].sdpos = sdpos;
     marker[index].counter = count ?: -1;
     index++;
-    DEBUG_ECHOLNPAIR("Add Marker ", int(index), " at ", sdpos, " (", count, ")");
+    DEBUG_ECHOLNPAIR("Add Marker ", index, " at ", sdpos, " (", count, ")");
   }
 }
 
@@ -53,14 +53,14 @@ void Repeat::loop() {
   else {
     const uint8_t ind = index - 1;      // Active marker's index
     if (!marker[ind].counter) {         // Did its counter run out?
-      DEBUG_ECHOLNPAIR("Pass Marker ", int(index));
+      DEBUG_ECHOLNPAIR("Pass Marker ", index);
       index--;                          //  Carry on. Previous marker on the next 'M808'.
     }
     else {
       card.setIndex(marker[ind].sdpos); // Loop back to the marker.
       if (marker[ind].counter > 0)      // Ignore a negative (or zero) counter.
         --marker[ind].counter;          // Decrement the counter. If zero this 'M808' will be skipped next time.
-      DEBUG_ECHOLNPAIR("Goto Marker ", int(index), " at ", marker[ind].sdpos, " (", marker[ind].counter, ")");
+      DEBUG_ECHOLNPAIR("Goto Marker ", index, " at ", marker[ind].sdpos, " (", marker[ind].counter, ")");
     }
   }
 }

Marlin/src/gcode/bedlevel/G26.cpp

@@ -537,7 +537,7 @@ void GcodeSuite::G26() {
 
     if (bedtemp) {
       if (!WITHIN(bedtemp, 40, BED_MAX_TARGET)) {
-        SERIAL_ECHOLNPAIR("?Specified bed temperature not plausible (40-", int(BED_MAX_TARGET), "C).");
+        SERIAL_ECHOLNPAIR("?Specified bed temperature not plausible (40-", BED_MAX_TARGET, "C).");
         return;
       }
       g26_bed_temp = bedtemp;

Marlin/src/gcode/bedlevel/G35.cpp

@@ -104,7 +104,7 @@ void GcodeSuite::G35() {
     const float z_probed_height = probe.probe_at_point(screws_tilt_adjust_pos[i], PROBE_PT_RAISE, 0, true);
 
     if (isnan(z_probed_height)) {
-      SERIAL_ECHOPAIR("G35 failed at point ", int(i), " (");
+      SERIAL_ECHOPAIR("G35 failed at point ", i, " (");
       SERIAL_ECHOPGM_P((char *)pgm_read_ptr(&tramming_point_name[i]));
       SERIAL_CHAR(')');
       SERIAL_ECHOLNPAIR_P(SP_X_STR, screws_tilt_adjust_pos[i].x, SP_Y_STR, screws_tilt_adjust_pos[i].y);
@@ -113,7 +113,7 @@ void GcodeSuite::G35() {
     }
 
     if (DEBUGGING(LEVELING)) {
-      DEBUG_ECHOPAIR("Probing point ", int(i), " (");
+      DEBUG_ECHOPAIR("Probing point ", i, " (");
       DEBUG_PRINT_P((char *)pgm_read_ptr(&tramming_point_name[i]));
       DEBUG_CHAR(')');
       DEBUG_ECHOLNPAIR_P(SP_X_STR, screws_tilt_adjust_pos[i].x, SP_Y_STR, screws_tilt_adjust_pos[i].y, SP_Z_STR, z_probed_height);

Marlin/src/gcode/bedlevel/abl/G29.cpp

@@ -637,7 +637,7 @@ G29_TYPE GcodeSuite::G29() {
           // Avoid probing outside the round or hexagonal area
           if (TERN0(IS_KINEMATIC, !probe.can_reach(probePos))) continue;
 
-          if (verbose_level) SERIAL_ECHOLNPAIR("Probing mesh point ", int(pt_index), "/", abl_points, ".");
+          if (verbose_level) SERIAL_ECHOLNPAIR("Probing mesh point ", pt_index, "/", abl_points, ".");
           TERN_(HAS_DISPLAY, ui.status_printf_P(0, PSTR(S_FMT " %i/%i"), GET_TEXT(MSG_PROBING_MESH), int(pt_index), int(abl_points)));
 
           measured_z = faux ? 0.001f * random(-100, 101) : probe.probe_at_point(probePos, raise_after, verbose_level);
@@ -682,7 +682,7 @@ G29_TYPE GcodeSuite::G29() {
       // Probe at 3 arbitrary points
 
       LOOP_L_N(i, 3) {
-        if (verbose_level) SERIAL_ECHOLNPAIR("Probing point ", int(i + 1), "/3.");
+        if (verbose_level) SERIAL_ECHOLNPAIR("Probing point ", i + 1, "/3.");
         TERN_(HAS_DISPLAY, ui.status_printf_P(0, PSTR(S_FMT " %i/3"), GET_TEXT(MSG_PROBING_MESH), int(i + 1)));
 
         // Retain the last probe position

Marlin/src/gcode/bedlevel/mbl/G29.cpp

@@ -142,7 +142,7 @@ void GcodeSuite::G29() {
       if (parser.seenval('I')) {
         ix = parser.value_int();
         if (!WITHIN(ix, 0, GRID_MAX_POINTS_X - 1)) {
-          SERIAL_ECHOLNPAIR("I out of range (0-", int(GRID_MAX_POINTS_X - 1), ")");
+          SERIAL_ECHOLNPAIR("I out of range (0-", GRID_MAX_POINTS_X - 1, ")");
           return;
         }
       }
@@ -152,7 +152,7 @@ void GcodeSuite::G29() {
       if (parser.seenval('J')) {
         iy = parser.value_int();
         if (!WITHIN(iy, 0, GRID_MAX_POINTS_Y - 1)) {
-          SERIAL_ECHOLNPAIR("J out of range (0-", int(GRID_MAX_POINTS_Y - 1), ")");
+          SERIAL_ECHOLNPAIR("J out of range (0-", GRID_MAX_POINTS_Y - 1, ")");
           return;
         }
       }
@@ -181,7 +181,7 @@ void GcodeSuite::G29() {
   } // switch(state)
 
   if (state == MeshNext)
-    SERIAL_ECHOLNPAIR("MBL G29 point ", _MIN(mbl_probe_index, GRID_MAX_POINTS), " of ", int(GRID_MAX_POINTS));
+    SERIAL_ECHOLNPAIR("MBL G29 point ", _MIN(mbl_probe_index, GRID_MAX_POINTS), " of ", GRID_MAX_POINTS);
 
   report_current_position();
 }

Marlin/src/gcode/calibrate/G34_M422.cpp

@@ -238,7 +238,7 @@ void GcodeSuite::G34() {
           // the next iteration of probing. This allows adjustments to be made away from the bed.
           z_measured[iprobe] = z_probed_height + Z_CLEARANCE_BETWEEN_PROBES;
 
-          if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", int(iprobe + 1), " measured position is ", z_measured[iprobe]);
+          if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", iprobe + 1, " measured position is ", z_measured[iprobe]);
 
           // Remember the minimum measurement to calculate the correction later on
           z_measured_min = _MIN(z_measured_min, z_measured[iprobe]);
@@ -267,7 +267,7 @@ void GcodeSuite::G34() {
           linear_fit_data lfd;
           incremental_LSF_reset(&lfd);
           LOOP_L_N(i, NUM_Z_STEPPER_DRIVERS) {
-            SERIAL_ECHOLNPAIR("PROBEPT_", int(i), ": ", z_measured[i]);
+            SERIAL_ECHOLNPAIR("PROBEPT_", i, ": ", z_measured[i]);
             incremental_LSF(&lfd, z_stepper_align.xy[i], z_measured[i]);
           }
           finish_incremental_LSF(&lfd);
@@ -357,8 +357,8 @@ void GcodeSuite::G34() {
 
             // Check for less accuracy compared to last move
             if (decreasing_accuracy(last_z_align_move[zstepper], z_align_abs)) {
-              if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", int(zstepper + 1), " last_z_align_move = ", last_z_align_move[zstepper]);
-              if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", int(zstepper + 1), " z_align_abs = ", z_align_abs);
+              if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", zstepper + 1, " last_z_align_move = ", last_z_align_move[zstepper]);
+              if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", zstepper + 1, " z_align_abs = ", z_align_abs);
               adjustment_reverse = !adjustment_reverse;
             }
 
@@ -370,7 +370,7 @@ void GcodeSuite::G34() {
           // Stop early if all measured points achieve accuracy target
           if (z_align_abs > z_auto_align_accuracy) success_break = false;
 
-          if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", int(zstepper + 1), " corrected by ", z_align_move);
+          if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", zstepper + 1, " corrected by ", z_align_move);
 
           // Lock all steppers except one
           stepper.set_all_z_lock(true, zstepper);
@@ -380,7 +380,7 @@ void GcodeSuite::G34() {
             // Will match reversed Z steppers on dual steppers. Triple will need more work to map.
             if (adjustment_reverse) {
               z_align_move = -z_align_move;
-              if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", int(zstepper + 1), " correction reversed to ", z_align_move);
+              if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", zstepper + 1, " correction reversed to ", z_align_move);
             }
           #endif
 
@@ -406,7 +406,7 @@ void GcodeSuite::G34() {
       if (err_break)
         SERIAL_ECHOLNPGM("G34 aborted.");
       else {
-        SERIAL_ECHOLNPAIR("Did ", int(iteration + (iteration != z_auto_align_iterations)), " of ", int(z_auto_align_iterations));
+        SERIAL_ECHOLNPAIR("Did ", iteration + (iteration != z_auto_align_iterations), " of ", z_auto_align_iterations);
         SERIAL_ECHOLNPAIR_F("Accuracy: ", z_maxdiff);
       }
 
@@ -467,10 +467,10 @@ void GcodeSuite::M422() {
 
   if (!parser.seen_any()) {
     LOOP_L_N(i, NUM_Z_STEPPER_DRIVERS)
-      SERIAL_ECHOLNPAIR_P(PSTR("M422 S"), int(i + 1), SP_X_STR, z_stepper_align.xy[i].x, SP_Y_STR, z_stepper_align.xy[i].y);
+      SERIAL_ECHOLNPAIR_P(PSTR("M422 S"), i + 1, SP_X_STR, z_stepper_align.xy[i].x, SP_Y_STR, z_stepper_align.xy[i].y);
     #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
       LOOP_L_N(i, NUM_Z_STEPPER_DRIVERS)
-        SERIAL_ECHOLNPAIR_P(PSTR("M422 W"), int(i + 1), SP_X_STR, z_stepper_align.stepper_xy[i].x, SP_Y_STR, z_stepper_align.stepper_xy[i].y);
+        SERIAL_ECHOLNPAIR_P(PSTR("M422 W"), i + 1, SP_X_STR, z_stepper_align.stepper_xy[i].x, SP_Y_STR, z_stepper_align.stepper_xy[i].y);
     #endif
     return;
   }

Marlin/src/gcode/calibrate/G425.cpp

@@ -375,7 +375,7 @@ inline void probe_sides(measurements_t &m, const float uncertainty) {
 
   inline void report_measured_positional_error(const measurements_t &m) {
     SERIAL_CHAR('T');
-    SERIAL_ECHO(int(active_extruder));
+    SERIAL_ECHO(active_extruder);
     SERIAL_ECHOLNPGM(" Positional Error:");
     #if HAS_X_CENTER
       SERIAL_ECHOLNPAIR_P(SP_X_STR, m.pos_error.x);
@@ -408,7 +408,7 @@ inline void probe_sides(measurements_t &m, const float uncertainty) {
     //
     inline void report_hotend_offsets() {
       LOOP_S_L_N(e, 1, HOTENDS)
-        SERIAL_ECHOLNPAIR_P(PSTR("T"), int(e), PSTR(" Hotend Offset X"), hotend_offset[e].x, SP_Y_STR, hotend_offset[e].y, SP_Z_STR, hotend_offset[e].z);
+        SERIAL_ECHOLNPAIR_P(PSTR("T"), e, PSTR(" Hotend Offset X"), hotend_offset[e].x, SP_Y_STR, hotend_offset[e].y, SP_Z_STR, hotend_offset[e].z);
     }
   #endif
 

Marlin/src/gcode/calibrate/M48.cpp

@@ -240,8 +240,8 @@ void GcodeSuite::M48() {
       sigma = SQRT(dev_sum / (n + 1));
 
       if (verbose_level > 1) {
-        SERIAL_ECHO((int)(n + 1));
-        SERIAL_ECHOPAIR(" of ", (int)n_samples);
+        SERIAL_ECHO(n + 1);
+        SERIAL_ECHOPAIR(" of ", n_samples);
         SERIAL_ECHOPAIR_F(": z: ", pz, 3);
         SERIAL_CHAR(' ');
         dev_report(verbose_level > 2, mean, sigma, min, max);

Marlin/src/gcode/config/M217.cpp

@@ -47,7 +47,7 @@ void M217_report(const bool eeprom=false) {
                     " G", toolchange_settings.fan_time);
 
     #if ENABLED(TOOLCHANGE_MIGRATION_FEATURE)
-      SERIAL_ECHOPAIR(" A", int(migration.automode));
+      SERIAL_ECHOPAIR(" A", migration.automode);
       SERIAL_ECHOPAIR(" L", LINEAR_UNIT(migration.last));
     #endif
 

Marlin/src/gcode/config/M305.cpp

@@ -50,7 +50,7 @@ void GcodeSuite::M305() {
 
   // A valid P index is required
   if (t_index >= (USER_THERMISTORS) || (do_set && t_index < 0))
-    SERIAL_ECHO_MSG("!Invalid index. (0 <= P <= ", int(USER_THERMISTORS - 1), ")");
+    SERIAL_ECHO_MSG("!Invalid index. (0 <= P <= ", USER_THERMISTORS - 1, ")");
   else if (do_set) {
     if (parser.seen('R')) // Pullup resistor value
       if (!thermalManager.set_pull_up_res(t_index, parser.value_float()))

Marlin/src/gcode/config/M43.cpp

@@ -131,7 +131,7 @@ inline void servo_probe_test() {
     const uint8_t probe_index = parser.byteval('P', Z_PROBE_SERVO_NR);
 
     SERIAL_ECHOLNPAIR("Servo probe test\n"
-                      ". using index:  ", int(probe_index),
+                      ". using index:  ", probe_index,
                       ", deploy angle: ", servo_angles[probe_index][0],
                       ", stow angle:   ", servo_angles[probe_index][1]
     );
@@ -143,7 +143,7 @@ inline void servo_probe_test() {
       #define PROBE_TEST_PIN Z_MIN_PIN
       constexpr bool probe_inverting = Z_MIN_ENDSTOP_INVERTING;
 
-      SERIAL_ECHOLNPAIR(". Probe Z_MIN_PIN: ", int(PROBE_TEST_PIN));
+      SERIAL_ECHOLNPAIR(". Probe Z_MIN_PIN: ", PROBE_TEST_PIN);
       SERIAL_ECHOPGM(". Z_MIN_ENDSTOP_INVERTING: ");
 
     #else
@@ -151,7 +151,7 @@ inline void servo_probe_test() {
       #define PROBE_TEST_PIN Z_MIN_PROBE_PIN
       constexpr bool probe_inverting = Z_MIN_PROBE_ENDSTOP_INVERTING;
 
-      SERIAL_ECHOLNPAIR(". Probe Z_MIN_PROBE_PIN: ", int(PROBE_TEST_PIN));
+      SERIAL_ECHOLNPAIR(". Probe Z_MIN_PROBE_PIN: ", PROBE_TEST_PIN);
       SERIAL_ECHOPGM(   ". Z_MIN_PROBE_ENDSTOP_INVERTING: ");
 
     #endif

Marlin/src/gcode/config/M92.cpp

@@ -37,7 +37,7 @@ void report_M92(const bool echo=true, const int8_t e=-1) {
     LOOP_L_N(i, E_STEPPERS) {
       if (e >= 0 && i != e) continue;
       if (echo) SERIAL_ECHO_START(); else SERIAL_CHAR(' ');
-      SERIAL_ECHOLNPAIR_P(PSTR(" M92 T"), (int)i,
+      SERIAL_ECHOLNPAIR_P(PSTR(" M92 T"), i,
                         SP_E_STR, VOLUMETRIC_UNIT(planner.settings.axis_steps_per_mm[E_AXIS_N(i)]));
     }
   #endif

Marlin/src/gcode/control/M605.cpp

@@ -122,26 +122,26 @@
           case DXC_DUPLICATION_MODE:  DEBUG_ECHOPGM("DUPLICATION");  break;
           case DXC_MIRRORED_MODE:     DEBUG_ECHOPGM("MIRRORED");     break;
         }
-        DEBUG_ECHOPAIR("\nActive Ext: ", int(active_extruder));
+        DEBUG_ECHOPAIR("\nActive Ext: ", active_extruder);
         if (!active_extruder_parked) DEBUG_ECHOPGM(" NOT ");
         DEBUG_ECHOPGM(" parked.");
         DEBUG_ECHOPAIR("\nactive_extruder_x_pos: ", current_position.x);
         DEBUG_ECHOPAIR("\ninactive_extruder_x: ", inactive_extruder_x);
-        DEBUG_ECHOPAIR("\nextruder_duplication_enabled: ", int(extruder_duplication_enabled));
+        DEBUG_ECHOPAIR("\nextruder_duplication_enabled: ", extruder_duplication_enabled);
         DEBUG_ECHOPAIR("\nduplicate_extruder_x_offset: ", duplicate_extruder_x_offset);
         DEBUG_ECHOPAIR("\nduplicate_extruder_temp_offset: ", duplicate_extruder_temp_offset);
         DEBUG_ECHOPAIR("\ndelayed_move_time: ", delayed_move_time);
-        DEBUG_ECHOPAIR("\nX1 Home X: ", x_home_pos(0), "\nX1_MIN_POS=", int(X1_MIN_POS), "\nX1_MAX_POS=", int(X1_MAX_POS));
-        DEBUG_ECHOPAIR("\nX2 Home X: ", x_home_pos(1), "\nX2_MIN_POS=", int(X2_MIN_POS), "\nX2_MAX_POS=", int(X2_MAX_POS));
-        DEBUG_ECHOPAIR("\nX2_HOME_DIR=", int(X2_HOME_DIR), "\nX2_HOME_POS=", int(X2_HOME_POS));
+        DEBUG_ECHOPAIR("\nX1 Home X: ", x_home_pos(0), "\nX1_MIN_POS=", X1_MIN_POS, "\nX1_MAX_POS=", X1_MAX_POS);
+        DEBUG_ECHOPAIR("\nX2 Home X: ", x_home_pos(1), "\nX2_MIN_POS=", X2_MIN_POS, "\nX2_MAX_POS=", X2_MAX_POS);
+        DEBUG_ECHOPAIR("\nX2_HOME_DIR=", X2_HOME_DIR, "\nX2_HOME_POS=", X2_HOME_POS);
         DEBUG_ECHOPAIR("\nDEFAULT_DUAL_X_CARRIAGE_MODE=", STRINGIFY(DEFAULT_DUAL_X_CARRIAGE_MODE));
         DEBUG_ECHOPAIR("\toolchange_settings.z_raise=", toolchange_settings.z_raise);
-        DEBUG_ECHOPAIR("\nDEFAULT_DUPLICATION_X_OFFSET=", int(DEFAULT_DUPLICATION_X_OFFSET));
+        DEBUG_ECHOPAIR("\nDEFAULT_DUPLICATION_X_OFFSET=", DEFAULT_DUPLICATION_X_OFFSET);
         DEBUG_EOL();
 
         HOTEND_LOOP() {
-          DEBUG_ECHOPAIR_P(SP_T_STR, int(e));
-          LOOP_XYZ(a) DEBUG_ECHOPAIR("  hotend_offset[", int(e), "].", XYZ_CHAR(a) | 0x20, "=", hotend_offset[e][a]);
+          DEBUG_ECHOPAIR_P(SP_T_STR, e);
+          LOOP_XYZ(a) DEBUG_ECHOPAIR("  hotend_offset[", e, "].", XYZ_CHAR(a) | 0x20, "=", hotend_offset[e][a]);
           DEBUG_EOL();
         }
         DEBUG_EOL();

Marlin/src/gcode/eeprom/M500-M504.cpp

@@ -75,7 +75,7 @@ void GcodeSuite::M502() {
         if (dowrite) {
           val = parser.byteval('V');
           persistentStore.write_data(addr, &val);
-          SERIAL_ECHOLNPAIR("Wrote address ", addr, " with ", int(val));
+          SERIAL_ECHOLNPAIR("Wrote address ", addr, " with ", val);
         }
         else {
           if (parser.seenval('T')) {
@@ -90,7 +90,7 @@ void GcodeSuite::M502() {
           }
           else {
             persistentStore.read_data(addr, &val);
-            SERIAL_ECHOLNPAIR("Read address ", addr, " and got ", int(val));
+            SERIAL_ECHOLNPAIR("Read address ", addr, " and got ", val);
           }
         }
         return;

Marlin/src/gcode/feature/advance/M900.cpp

@@ -115,12 +115,12 @@ void GcodeSuite::M900() {
     #if ENABLED(EXTRA_LIN_ADVANCE_K)
 
       #if EXTRUDERS < 2
-        SERIAL_ECHOLNPAIR("Advance S", int(new_slot), " K", kref, "(S", int(!new_slot), " K", lref, ")");
+        SERIAL_ECHOLNPAIR("Advance S", new_slot, " K", kref, "(S", !new_slot, " K", lref, ")");
       #else
         LOOP_L_N(i, EXTRUDERS) {
           const bool slot = TEST(lin_adv_slot, i);
-          SERIAL_ECHOLNPAIR("Advance T", int(i), " S", int(slot), " K", planner.extruder_advance_K[i],
-                            "(S", int(!slot), " K", other_extruder_advance_K[i], ")");
+          SERIAL_ECHOLNPAIR("Advance T", i, " S", slot, " K", planner.extruder_advance_K[i],
+                            "(S", !slot, " K", other_extruder_advance_K[i], ")");
           SERIAL_EOL();
         }
       #endif

Marlin/src/gcode/feature/leds/M7219.cpp

@@ -82,7 +82,7 @@ void GcodeSuite::M7219() {
     LOOP_L_N(r, MAX7219_LINES) {
       SERIAL_ECHOPGM("led_line[");
       if (r < 10) SERIAL_CHAR(' ');
-      SERIAL_ECHO(int(r));
+      SERIAL_ECHO(r);
       SERIAL_ECHOPGM("]=");
       for (uint8_t b = 8; b--;) SERIAL_CHAR('0' + TEST(max7219.led_line[r], b));
       SERIAL_EOL();

Marlin/src/gcode/feature/mixing/M166.cpp

@@ -30,7 +30,7 @@
 #include "../../../feature/mixing.h"
 
 inline void echo_mix() {
-  SERIAL_ECHOPAIR(" (", int(mixer.mix[0]), "%|", int(mixer.mix[1]), "%)");
+  SERIAL_ECHOPAIR(" (", mixer.mix[0], "%|", mixer.mix[1], "%)");
 }
 
 inline void echo_zt(const int t, const float &z) {
@@ -74,7 +74,7 @@ void GcodeSuite::M166() {
 
     #if ENABLED(GRADIENT_VTOOL)
       if (mixer.gradient.vtool_index >= 0) {
-        SERIAL_ECHOPAIR(" (T", int(mixer.gradient.vtool_index));
+        SERIAL_ECHOPAIR(" (T", mixer.gradient.vtool_index);
         SERIAL_CHAR(')');
       }
     #endif

Marlin/src/gcode/feature/network/M552-M554.cpp

@@ -48,7 +48,7 @@ void MAC_report() {
     SERIAL_ECHOPGM("  MAC: ");
     LOOP_L_N(i, 6) {
       if (mac[i] < 16) SERIAL_CHAR('0');
-      SERIAL_PRINT(mac[i], HEX);
+      SERIAL_PRINT(mac[i], PrintBase::Hex);
       if (i < 5) SERIAL_CHAR(':');
     }
   }

Marlin/src/gcode/feature/pause/G61.cpp

@@ -49,7 +49,7 @@ void GcodeSuite::G61(void) {
   // No saved position? No axes being restored?
   if (!TEST(saved_slots[slot >> 3], slot & 0x07) || !parser.seen("XYZ")) return;
 
-  SERIAL_ECHOPAIR(STR_RESTORING_POS " S", int(slot));
+  SERIAL_ECHOPAIR(STR_RESTORING_POS " S", slot);
   LOOP_XYZ(i) {
     destination[i] = parser.seen(XYZ_CHAR(i))
       ? stored_position[slot][i] + parser.value_axis_units((AxisEnum)i)

Marlin/src/gcode/gcode.cpp

@@ -105,7 +105,7 @@ int8_t GcodeSuite::get_target_extruder_from_command() {
     if (e < EXTRUDERS) return e;
     SERIAL_ECHO_START();
     SERIAL_CHAR('M'); SERIAL_ECHO(parser.codenum);
-    SERIAL_ECHOLNPAIR(" " STR_INVALID_EXTRUDER " ", int(e));
+    SERIAL_ECHOLNPAIR(" " STR_INVALID_EXTRUDER " ", e);
     return -1;
   }
   return active_extruder;
@@ -124,7 +124,7 @@ int8_t GcodeSuite::get_target_e_stepper_from_command() {
   if (e == -1)
     SERIAL_ECHOLNPGM(" " STR_E_STEPPER_NOT_SPECIFIED);
   else
-    SERIAL_ECHOLNPAIR(" " STR_INVALID_E_STEPPER " ", int(e));
+    SERIAL_ECHOLNPAIR(" " STR_INVALID_E_STEPPER " ", e);
   return -1;
 }
 

Marlin/src/gcode/host/M113.cpp

@@ -38,7 +38,7 @@ void GcodeSuite::M113() {
     NOMORE(host_keepalive_interval, 60);
   }
   else
-    SERIAL_ECHO_MSG("M113 S", (uint16_t)host_keepalive_interval);
+    SERIAL_ECHO_MSG("M113 S", host_keepalive_interval);
 
 }
 

Marlin/src/gcode/host/M360.cpp

@@ -35,7 +35,7 @@
 static void config_prefix(PGM_P const name, PGM_P const pref=nullptr, const int8_t ind=-1) {
   SERIAL_ECHOPGM("Config:");
   if (pref) serialprintPGM(pref);
-  if (ind >= 0) { SERIAL_ECHO(int(ind)); SERIAL_CHAR(':'); }
+  if (ind >= 0) { SERIAL_ECHO(ind); SERIAL_CHAR(':'); }
   serialprintPGM(name);
   SERIAL_CHAR(':');
 }

Marlin/src/gcode/motion/M290.cpp

@@ -97,7 +97,7 @@ void GcodeSuite::M290() {
     #if ENABLED(BABYSTEP_HOTEND_Z_OFFSET)
     {
       SERIAL_ECHOLNPAIR_P(
-        PSTR("Hotend "), int(active_extruder)
+        PSTR("Hotend "), active_extruder
         #if ENABLED(BABYSTEP_XY)
           , PSTR("Offset X"), hotend_offset[active_extruder].x
           , SP_Y_STR, hotend_offset[active_extruder].y

Marlin/src/gcode/parser.cpp

@@ -307,7 +307,7 @@ void GCodeParser::parse(char *p) {
 
       #if ENABLED(DEBUG_GCODE_PARSER)
         if (debug) {
-          SERIAL_ECHOPAIR("Got param ", param, " at index ", (int)(p - command_ptr - 1));
+          SERIAL_ECHOPAIR("Got param ", param, " at index ", p - command_ptr - 1);
           if (has_val) SERIAL_ECHOPGM(" (has_val)");
         }
       #endif
@@ -391,8 +391,8 @@ void GCodeParser::unknown_command_warning() {
             "\n   sec-ms: ", value_millis_from_seconds(),
             "\n      int: ", value_int(),
             "\n   ushort: ", value_ushort(),
-            "\n     byte: ", (int)value_byte(),
-            "\n     bool: ", (int)value_bool(),
+            "\n     byte: ", value_byte(),
+            "\n     bool: ", value_bool(),
             "\n   linear: ", value_linear_units(),
             "\n  celsius: ", value_celsius()
           );

Marlin/src/gcode/parser.h

@@ -133,9 +133,9 @@ public:
       param[ind] = ptr ? ptr - command_ptr : 0;  // parameter offset or 0
       #if ENABLED(DEBUG_GCODE_PARSER)
         if (codenum == 800) {
-          SERIAL_ECHOPAIR("Set bit ", (int)ind, " of codebits (", hex_address((void*)(codebits >> 16)));
+          SERIAL_ECHOPAIR("Set bit ", ind, " of codebits (", hex_address((void*)(codebits >> 16)));
           print_hex_word((uint16_t)(codebits & 0xFFFF));
-          SERIAL_ECHOLNPAIR(") | param = ", (int)param[ind]);
+          SERIAL_ECHOLNPAIR(") | param = ", param[ind]);
         }
       #endif
     }

Marlin/src/gcode/probe/M851.cpp

@@ -58,7 +58,7 @@ void GcodeSuite::M851() {
       if (WITHIN(x, -(X_BED_SIZE), X_BED_SIZE))
         offs.x = x;
       else {
-        SERIAL_ECHOLNPAIR("?X out of range (-", int(X_BED_SIZE), " to ", int(X_BED_SIZE), ")");
+        SERIAL_ECHOLNPAIR("?X out of range (-", X_BED_SIZE, " to ", X_BED_SIZE, ")");
         ok = false;
       }
     #else
@@ -72,7 +72,7 @@ void GcodeSuite::M851() {
       if (WITHIN(y, -(Y_BED_SIZE), Y_BED_SIZE))
         offs.y = y;
       else {
-        SERIAL_ECHOLNPAIR("?Y out of range (-", int(Y_BED_SIZE), " to ", int(Y_BED_SIZE), ")");
+        SERIAL_ECHOLNPAIR("?Y out of range (-", Y_BED_SIZE, " to ", Y_BED_SIZE, ")");
         ok = false;
       }
     #else
@@ -85,7 +85,7 @@ void GcodeSuite::M851() {
     if (WITHIN(z, Z_PROBE_OFFSET_RANGE_MIN, Z_PROBE_OFFSET_RANGE_MAX))
       offs.z = z;
     else {
-      SERIAL_ECHOLNPAIR("?Z out of range (", int(Z_PROBE_OFFSET_RANGE_MIN), " to ", int(Z_PROBE_OFFSET_RANGE_MAX), ")");
+      SERIAL_ECHOLNPAIR("?Z out of range (", Z_PROBE_OFFSET_RANGE_MIN, " to ", Z_PROBE_OFFSET_RANGE_MAX, ")");
       ok = false;
     }
   }

Marlin/src/gcode/queue.cpp

@@ -302,8 +302,8 @@ void GCodeQueue::ok_to_send() {
       while (NUMERIC_SIGNED(*p))
         SERIAL_CHAR(*p++);
     }
-    SERIAL_ECHOPAIR_P(SP_P_STR, int(planner.moves_free()),
-                      SP_B_STR, int(BUFSIZE - length));
+    SERIAL_ECHOPAIR_P(SP_P_STR, planner.moves_free(),
+                      SP_B_STR, BUFSIZE - length);
   #endif
   SERIAL_EOL();
 }

Marlin/src/lcd/dwin/e3v2/dwin.cpp

@@ -1772,7 +1772,7 @@ void HMI_SDCardUpdate() {
   if (HMI_flag.home_flag) return;
   if (DWIN_lcd_sd_status != card.isMounted()) {
     DWIN_lcd_sd_status = card.isMounted();
-    // SERIAL_ECHOLNPAIR("HMI_SDCardUpdate: ", int(DWIN_lcd_sd_status));
+    // SERIAL_ECHOLNPAIR("HMI_SDCardUpdate: ", DWIN_lcd_sd_status);
     if (DWIN_lcd_sd_status) {
       if (checkkey == SelectFile)
         Redraw_SD_List();

Marlin/src/lcd/extui/lib/anycubic_i3mega/anycubic_i3mega_lcd.cpp

@@ -141,7 +141,7 @@ void AnycubicTFTClass::OnKillTFT() {
 
 void AnycubicTFTClass::OnSDCardStateChange(bool isInserted) {
   #if ENABLED(ANYCUBIC_LCD_DEBUG)
-    SERIAL_ECHOLNPAIR("TFT Serial Debug: OnSDCardStateChange event triggered...", (int)isInserted);
+    SERIAL_ECHOLNPAIR("TFT Serial Debug: OnSDCardStateChange event triggered...", isInserted);
   #endif
   DoSDCardStateCheck();
 }

Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/ftdi_eve_lib/basic/commands.cpp

@@ -1083,7 +1083,7 @@ void CLCD::init() {
 
    if (counter == 249) {
       #if ENABLED(TOUCH_UI_DEBUG)
-        SERIAL_ECHO_MSG("Timeout waiting for device ID, should be 124, got ", int(device_id));
+        SERIAL_ECHO_MSG("Timeout waiting for device ID, should be 124, got ", device_id);
       #endif
     }
   }
@@ -1101,7 +1101,7 @@ void CLCD::init() {
       delay(1);
 
     if (ENABLED(TOUCH_UI_DEBUG) && counter == 99)
-      SERIAL_ECHO_MSG("Timeout waiting for reset status. Should be 0x00, got ", int(reset_status));
+      SERIAL_ECHO_MSG("Timeout waiting for reset status. Should be 0x00, got ", reset_status);
   }
 
   mem_write_8(REG::PWM_DUTY, 0);   // turn off Backlight, Frequency already is set to 250Hz default

Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/ftdi_eve_lib/extended/event_loop.cpp

@@ -124,7 +124,7 @@ namespace FTDI {
       case UNPRESSED:
         if (tag != 0) {
           #if ENABLED(TOUCH_UI_DEBUG)
-            SERIAL_ECHO_MSG("Touch start: ", int(tag));
+            SERIAL_ECHO_MSG("Touch start: ", tag);
           #endif
 
           pressed_tag = tag;
@@ -185,7 +185,7 @@ namespace FTDI {
             if (UIData::flags.bits.touch_end_sound) sound.play(unpress_sound);
 
             #if ENABLED(TOUCH_UI_DEBUG)
-              SERIAL_ECHO_MSG("Touch end: ", int(pressed_tag));
+              SERIAL_ECHO_MSG("Touch end: ", pressed_tag);
             #endif
 
             const uint8_t saved_pressed_tag = pressed_tag;

Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/ftdi_eve_lib/extended/screen_types.cpp

@@ -43,7 +43,7 @@ void ScreenRef::setScreen(onRedraw_func_t onRedraw_ptr) {
   if (type != 0xFF) {
     setType(type);
     #if ENABLED(TOUCH_UI_DEBUG)
-      SERIAL_ECHO_MSG("New screen: ", int(type));
+      SERIAL_ECHO_MSG("New screen: ", type);
     #endif
   }
 }

Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/ftdi_eve_lib/extended/sound_player.cpp

@@ -37,9 +37,7 @@ namespace FTDI {
   void SoundPlayer::play(effect_t effect, note_t note) {
 
     #if ENABLED(TOUCH_UI_DEBUG)
-      SERIAL_ECHO_START();
-      SERIAL_ECHOPAIR  ("Playing note ", int(note));
-      SERIAL_ECHOLNPAIR(", instrument ", int(effect));
+      SERIAL_ECHO_MSG("Playing note ", note, ", instrument ", effect);
     #endif
 
     // Play the note

Marlin/src/lcd/marlinui.cpp

@@ -751,7 +751,7 @@ void MarlinUI::quick_feedback(const bool clear_buttons/*=true*/) {
         // For Cartesian / Core motion simply move to the current_position
         planner.buffer_line(current_position, fr_mm_s, axis == E_AXIS ? e_index : active_extruder);
 
-        //SERIAL_ECHOLNPAIR("Add planner.move with Axis ", int(axis), " at FR ", fr_mm_s);
+        //SERIAL_ECHOLNPAIR("Add planner.move with Axis ", axis, " at FR ", fr_mm_s);
 
         axis = NO_AXIS;
 
@@ -772,7 +772,7 @@ void MarlinUI::quick_feedback(const bool clear_buttons/*=true*/) {
     #endif
     start_time = millis() + (menu_scale < 0.99f ? 0UL : 250UL); // delay for bigger moves
     axis = move_axis;
-    //SERIAL_ECHOLNPAIR("Post Move with Axis ", int(axis), " soon.");
+    //SERIAL_ECHOLNPAIR("Post Move with Axis ", axis, " soon.");
   }
 
   #if ENABLED(AUTO_BED_LEVELING_UBL)

Marlin/src/lcd/menu/menu_configuration.cpp

@@ -216,7 +216,7 @@ void menu_advanced_settings();
 
   #if ENABLED(BLTOUCH_LCD_VOLTAGE_MENU)
     void bltouch_report() {
-      SERIAL_ECHOLNPAIR("EEPROM Last BLTouch Mode - ", (int)bltouch.last_written_mode);
+      SERIAL_ECHOLNPAIR("EEPROM Last BLTouch Mode - ", bltouch.last_written_mode);
       SERIAL_ECHOLNPGM("Configuration BLTouch Mode - " TERN(BLTOUCH_SET_5V_MODE, "5V", "OD"));
       char mess[21];
       strcpy_P(mess, PSTR("BLTouch Mode - "));

Marlin/src/libs/bresenham.h

@@ -120,7 +120,7 @@ public:
 
   static void report(const uint8_t index) {
     if (index < Cfg::SIZE) {
-      SERIAL_ECHOPAIR("bresenham ", int(index), " : (", dividend[index], "/", divisor, ") ");
+      SERIAL_ECHOPAIR("bresenham ", index, " : (", dividend[index], "/", divisor, ") ");
       if (counter[index] >= 0) SERIAL_CHAR(' ');
       if (labs(counter[index]) < 100) { SERIAL_CHAR(' '); if (labs(counter[index]) < 10) SERIAL_CHAR(' '); }
       SERIAL_ECHO(counter[index]);

Marlin/src/module/motion.cpp

@@ -1305,7 +1305,7 @@ void do_homing_move(const AxisEnum axis, const float distance, const feedRate_t
   const feedRate_t home_fr_mm_s = fr_mm_s ?: homing_feedrate(axis);
 
   if (DEBUGGING(LEVELING)) {
-    DEBUG_ECHOPAIR("...(", axis_codes[axis], ", ", distance, ", ");
+    DEBUG_ECHOPAIR("...(", AS_CHAR(axis_codes[axis]), ", ", distance, ", ");
     if (fr_mm_s)
       DEBUG_ECHO(fr_mm_s);
     else
@@ -1398,7 +1398,7 @@ void do_homing_move(const AxisEnum axis, const float distance, const feedRate_t
  * Callers must sync the planner position after calling this!
  */
 void set_axis_is_at_home(const AxisEnum axis) {
-  if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR(">>> set_axis_is_at_home(", axis_codes[axis], ")");
+  if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR(">>> set_axis_is_at_home(", AS_CHAR(axis_codes[axis]), ")");
 
   set_axis_trusted(axis);
   set_axis_homed(axis);
@@ -1448,7 +1448,7 @@ void set_axis_is_at_home(const AxisEnum axis) {
 
   if (DEBUGGING(LEVELING)) {
     #if HAS_HOME_OFFSET
-      DEBUG_ECHOLNPAIR("> home_offset[", axis_codes[axis], "] = ", home_offset[axis]);
+      DEBUG_ECHOLNPAIR("> home_offset[", AS_CHAR(axis_codes[axis]), "] = ", home_offset[axis]);
     #endif
     DEBUG_POS("", current_position);
     DEBUG_ECHOLNPAIR("<<< set_axis_is_at_home(", axis_codes[axis], ")");

Marlin/src/module/probe.cpp

@@ -719,7 +719,7 @@ float Probe::probe_at_point(const float &rx, const float &ry, const ProbePtRaise
     DEBUG_ECHOLNPAIR(
       "...(", LOGICAL_X_POSITION(rx), ", ", LOGICAL_Y_POSITION(ry),
       ", ", raise_after == PROBE_PT_RAISE ? "raise" : raise_after == PROBE_PT_STOW ? "stow" : "none",
-      ", ", int(verbose_level),
+      ", ", verbose_level,
       ", ", probe_relative ? "probe" : "nozzle", "_relative)"
     );
     DEBUG_POS("", current_position);

Marlin/src/module/settings.cpp

@@ -2289,7 +2289,7 @@ void MarlinSettings::postprocess() {
       eeprom_error = size_error(eeprom_index - (EEPROM_OFFSET));
       if (eeprom_error) {
         DEBUG_ECHO_START();
-        DEBUG_ECHOLNPAIR("Index: ", int(eeprom_index - (EEPROM_OFFSET)), " Size: ", datasize());
+        DEBUG_ECHOLNPAIR("Index: ", eeprom_index - (EEPROM_OFFSET), " Size: ", datasize());
         IF_DISABLED(EEPROM_AUTO_INIT, ui.eeprom_alert_index());
       }
       else if (working_crc != stored_crc) {
@@ -3039,7 +3039,7 @@ void MarlinSettings::reset() {
       }
 
       #if EXTRUDERS == 1
-        CONFIG_ECHO_MSG("  M200 S", int(parser.volumetric_enabled)
+        CONFIG_ECHO_MSG("  M200 S", parser.volumetric_enabled
                             , " D", LINEAR_UNIT(planner.filament_size[0])
                             #if ENABLED(VOLUMETRIC_EXTRUDER_LIMIT)
                               , " L", LINEAR_UNIT(planner.volumetric_extruder_limit[0])
@@ -3047,14 +3047,14 @@ void MarlinSettings::reset() {
                        );
       #else
         LOOP_L_N(i, EXTRUDERS) {
-          CONFIG_ECHO_MSG("  M200 T", int(i)
+          CONFIG_ECHO_MSG("  M200 T", i
                               , " D", LINEAR_UNIT(planner.filament_size[i])
                               #if ENABLED(VOLUMETRIC_EXTRUDER_LIMIT)
                                 , " L", LINEAR_UNIT(planner.volumetric_extruder_limit[i])
                               #endif
                          );
         }
-        CONFIG_ECHO_MSG("  M200 S", int(parser.volumetric_enabled));
+        CONFIG_ECHO_MSG("  M200 S", parser.volumetric_enabled);
       #endif
 
     #endif // EXTRUDERS && !NO_VOLUMETRICS
@@ -3076,7 +3076,7 @@ void MarlinSettings::reset() {
       LOOP_L_N(i, E_STEPPERS) {
         CONFIG_ECHO_START();
         SERIAL_ECHOLNPAIR_P(
-            PSTR("  M203 T"), (int)i
+            PSTR("  M203 T"), i
           , SP_E_STR, VOLUMETRIC_UNIT(planner.settings.max_feedrate_mm_s[E_AXIS_N(i)])
         );
       }
@@ -3096,7 +3096,7 @@ void MarlinSettings::reset() {
       LOOP_L_N(i, E_STEPPERS) {
         CONFIG_ECHO_START();
         SERIAL_ECHOLNPAIR_P(
-            PSTR("  M201 T"), (int)i
+            PSTR("  M201 T"), i
           , SP_E_STR, VOLUMETRIC_UNIT(planner.settings.max_acceleration_mm_per_s2[E_AXIS_N(i)])
         );
       }
@@ -3158,7 +3158,7 @@ void MarlinSettings::reset() {
       CONFIG_ECHO_START();
       LOOP_S_L_N(e, 1, HOTENDS) {
         SERIAL_ECHOPAIR_P(
-          PSTR("  M218 T"), (int)e,
+          PSTR("  M218 T"), e,
           SP_X_STR, LINEAR_UNIT(hotend_offset[e].x),
           SP_Y_STR, LINEAR_UNIT(hotend_offset[e].y)
         );
@@ -3192,7 +3192,7 @@ void MarlinSettings::reset() {
 
       CONFIG_ECHO_START();
       SERIAL_ECHOLNPAIR_P(
-        PSTR("  M420 S"), int(planner.leveling_active)
+        PSTR("  M420 S"), planner.leveling_active
         #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
           , SP_Z_STR, LINEAR_UNIT(planner.z_fade_height)
         #endif
@@ -3204,7 +3204,7 @@ void MarlinSettings::reset() {
           LOOP_L_N(py, GRID_MAX_POINTS_Y) {
             LOOP_L_N(px, GRID_MAX_POINTS_X) {
               CONFIG_ECHO_START();
-              SERIAL_ECHOPAIR_P(PSTR("  G29 S3 I"), (int)px, PSTR(" J"), (int)py);
+              SERIAL_ECHOPAIR_P(PSTR("  G29 S3 I"), px, PSTR(" J"), py);
               SERIAL_ECHOLNPAIR_F_P(SP_Z_STR, LINEAR_UNIT(mbl.z_values[px][py]), 5);
             }
           }
@@ -3233,7 +3233,7 @@ void MarlinSettings::reset() {
           LOOP_L_N(py, GRID_MAX_POINTS_Y) {
             LOOP_L_N(px, GRID_MAX_POINTS_X) {
               CONFIG_ECHO_START();
-              SERIAL_ECHOPAIR("  G29 W I", (int)px, " J", (int)py);
+              SERIAL_ECHOPAIR("  G29 W I", px, " J", py);
               SERIAL_ECHOLNPAIR_F_P(SP_Z_STR, LINEAR_UNIT(z_values[px][py]), 5);
             }
           }
@@ -3258,7 +3258,7 @@ void MarlinSettings::reset() {
           #elif ENABLED(BLTOUCH) || (HAS_Z_SERVO_PROBE && defined(Z_SERVO_ANGLES))
             case Z_PROBE_SERVO_NR:
           #endif
-            CONFIG_ECHO_MSG("  M281 P", int(i), " L", servo_angles[i][0], " U", servo_angles[i][1]);
+            CONFIG_ECHO_MSG("  M281 P", i, " L", servo_angles[i][0], " U", servo_angles[i][1]);
           default: break;
         }
       }
@@ -3334,7 +3334,7 @@ void MarlinSettings::reset() {
       LOOP_L_N(i, PREHEAT_COUNT) {
         CONFIG_ECHO_START();
         SERIAL_ECHOLNPAIR_P(
-          PSTR("  M145 S"), (int)i
+          PSTR("  M145 S"), i
           #if HAS_HOTEND
             , PSTR(" H"), TEMP_UNIT(ui.material_preset[i].hotend_temp)
           #endif
@@ -3403,7 +3403,7 @@ void MarlinSettings::reset() {
 
     #if ENABLED(POWER_LOSS_RECOVERY)
       CONFIG_ECHO_HEADING("Power-Loss Recovery:");
-      CONFIG_ECHO_MSG("  M413 S", int(recovery.enabled));
+      CONFIG_ECHO_MSG("  M413 S", recovery.enabled);
     #endif
 
     #if ENABLED(FWRETRACT)
@@ -3425,11 +3425,9 @@ void MarlinSettings::reset() {
       );
 
       #if ENABLED(FWRETRACT_AUTORETRACT)
-
         CONFIG_ECHO_HEADING("Auto-Retract: S=0 to disable, 1 to interpret E-only moves as retract/recover");
-        CONFIG_ECHO_MSG("  M209 S", int(fwretract.autoretract_enabled));
-
-      #endif // FWRETRACT_AUTORETRACT
+        CONFIG_ECHO_MSG("  M209 S", fwretract.autoretract_enabled);
+      #endif
 
     #endif // FWRETRACT
 
@@ -3775,7 +3773,7 @@ void MarlinSettings::reset() {
         CONFIG_ECHO_MSG("  M900 K", planner.extruder_advance_K[0]);
       #else
         LOOP_L_N(i, EXTRUDERS)
-          CONFIG_ECHO_MSG("  M900 T", int(i), " K", planner.extruder_advance_K[i]);
+          CONFIG_ECHO_MSG("  M900 T", i, " K", planner.extruder_advance_K[i]);
       #endif
     #endif
 
@@ -3841,7 +3839,7 @@ void MarlinSettings::reset() {
     #if HAS_FILAMENT_SENSOR
       CONFIG_ECHO_HEADING("Filament runout sensor:");
       CONFIG_ECHO_MSG(
-        "  M412 S", int(runout.enabled)
+        "  M412 S", runout.enabled
         #if HAS_FILAMENT_RUNOUT_DISTANCE
           , " D", LINEAR_UNIT(runout.runout_distance())
         #endif
@@ -3859,7 +3857,7 @@ void MarlinSettings::reset() {
 
     #if HAS_MULTI_LANGUAGE
       CONFIG_ECHO_HEADING("UI Language:");
-      SERIAL_ECHO_MSG("  M414 S", int(ui.language));
+      SERIAL_ECHO_MSG("  M414 S", ui.language);
     #endif
   }
 

Marlin/src/module/temperature.cpp

@@ -828,7 +828,7 @@ void Temperature::_temp_error(const heater_id_t heater_id, PGM_P const serial_ms
     serialprintPGM(serial_msg);
     SERIAL_ECHOPGM(STR_STOPPED_HEATER);
     if (heater_id >= 0)
-      SERIAL_ECHO((int)heater_id);
+      SERIAL_ECHO(heater_id);
     else if (TERN0(HAS_HEATED_CHAMBER, heater_id == H_CHAMBER))
       SERIAL_ECHOPGM(STR_HEATER_CHAMBER);
     else
@@ -1494,7 +1494,7 @@ void Temperature::manage_heater() {
   float Temperature::analog_to_celsius_hotend(const int raw, const uint8_t e) {
       if (e > HOTENDS - DISABLED(TEMP_SENSOR_1_AS_REDUNDANT)) {
         SERIAL_ERROR_START();
-        SERIAL_ECHO((int)e);
+        SERIAL_ECHO(e);
         SERIAL_ECHOLNPGM(STR_INVALID_EXTRUDER_NUM);
         kill();
         return 0;
@@ -2065,7 +2065,7 @@ void Temperature::init() {
       switch (heater_id) {
         case H_BED:     SERIAL_ECHOPGM("bed"); break;
         case H_CHAMBER: SERIAL_ECHOPGM("chamber"); break;
-        default:        SERIAL_ECHO((int)heater_id);
+        default:        SERIAL_ECHO(heater_id);
       }
       SERIAL_ECHOLNPAIR(
         " ; sizeof(running_temp):", sizeof(running_temp),

Marlin/src/module/tool_change.cpp

@@ -186,7 +186,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     current_position.x = mpe_settings.parking_xpos[new_tool] + offsetcompensation;
 
-    DEBUG_ECHOPAIR("(1) Move extruder ", int(new_tool));
+    DEBUG_ECHOPAIR("(1) Move extruder ", new_tool);
     DEBUG_POS(" to new extruder ParkPos", current_position);
 
     planner.buffer_line(current_position, mpe_settings.fast_feedrate, new_tool);
@@ -196,7 +196,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     current_position.x = grabpos + offsetcompensation;
 
-    DEBUG_ECHOPAIR("(2) Couple extruder ", int(new_tool));
+    DEBUG_ECHOPAIR("(2) Couple extruder ", new_tool);
     DEBUG_POS(" to new extruder GrabPos", current_position);
 
     planner.buffer_line(current_position, mpe_settings.slow_feedrate, new_tool);
@@ -209,7 +209,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     current_position.x = mpe_settings.parking_xpos[new_tool] + offsetcompensation;
 
-    DEBUG_ECHOPAIR("(3) Move extruder ", int(new_tool));
+    DEBUG_ECHOPAIR("(3) Move extruder ", new_tool);
     DEBUG_POS(" back to new extruder ParkPos", current_position);
 
     planner.buffer_line(current_position, mpe_settings.slow_feedrate, new_tool);
@@ -219,7 +219,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     current_position.x = mpe_settings.parking_xpos[active_extruder] + (active_extruder == 0 ? MPE_TRAVEL_DISTANCE : -MPE_TRAVEL_DISTANCE) + offsetcompensation;
 
-    DEBUG_ECHOPAIR("(4) Move extruder ", int(new_tool));
+    DEBUG_ECHOPAIR("(4) Move extruder ", new_tool);
     DEBUG_POS(" close to old extruder ParkPos", current_position);
 
     planner.buffer_line(current_position, mpe_settings.fast_feedrate, new_tool);
@@ -229,7 +229,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     current_position.x = mpe_settings.parking_xpos[active_extruder] + offsetcompensation;
 
-    DEBUG_ECHOPAIR("(5) Park extruder ", int(new_tool));
+    DEBUG_ECHOPAIR("(5) Park extruder ", new_tool);
     DEBUG_POS(" at old extruder ParkPos", current_position);
 
     planner.buffer_line(current_position, mpe_settings.slow_feedrate, new_tool);
@@ -239,7 +239,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     current_position.x = oldx;
 
-    DEBUG_ECHOPAIR("(6) Move extruder ", int(new_tool));
+    DEBUG_ECHOPAIR("(6) Move extruder ", new_tool);
     DEBUG_POS(" to starting position", current_position);
 
     planner.buffer_line(current_position, mpe_settings.fast_feedrate, new_tool);
@@ -274,9 +274,9 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     if (homed_towards_final_tool) {
       pe_solenoid_magnet_off(1 - final_tool);
-      DEBUG_ECHOLNPAIR("Disengage magnet", (int)(1 - final_tool));
+      DEBUG_ECHOLNPAIR("Disengage magnet", 1 - final_tool);
       pe_solenoid_magnet_on(final_tool);
-      DEBUG_ECHOLNPAIR("Engage magnet", (int)final_tool);
+      DEBUG_ECHOLNPAIR("Engage magnet", final_tool);
       parking_extruder_set_parked(false);
       return false;
     }
@@ -315,7 +315,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
       if (!extruder_parked) {
         current_position.x = parkingposx[active_extruder] + x_offset;
 
-        DEBUG_ECHOLNPAIR("(1) Park extruder ", int(active_extruder));
+        DEBUG_ECHOLNPAIR("(1) Park extruder ", active_extruder);
         DEBUG_POS("Moving ParkPos", current_position);
 
         fast_line_to_current(X_AXIS);
@@ -411,7 +411,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     current_position.x = placexpos;
 
-    DEBUG_ECHOLNPAIR("(1) Place old tool ", int(active_extruder));
+    DEBUG_ECHOLNPAIR("(1) Place old tool ", active_extruder);
     DEBUG_POS("Move X SwitchPos", current_position);
 
     fast_line_to_current(X_AXIS);
@@ -509,7 +509,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 
     current_position.y = SWITCHING_TOOLHEAD_Y_POS + SWITCHING_TOOLHEAD_Y_CLEAR;
 
-    SERIAL_ECHOLNPAIR("(1) Place old tool ", int(active_extruder));
+    SERIAL_ECHOLNPAIR("(1) Place old tool ", active_extruder);
     DEBUG_POS("Move Y SwitchPos + Security", current_position);
 
     fast_line_to_current(Y_AXIS);
@@ -709,7 +709,7 @@ inline void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_a
 #if EXTRUDERS
   inline void invalid_extruder_error(const uint8_t e) {
     SERIAL_ECHO_START();
-    SERIAL_CHAR('T'); SERIAL_ECHO((int)e);
+    SERIAL_CHAR('T'); SERIAL_ECHO(e);
     SERIAL_CHAR(' '); SERIAL_ECHOLNPGM(STR_INVALID_EXTRUDER);
   }
 #endif
@@ -1196,7 +1196,7 @@ void tool_change(const uint8_t new_tool, bool no_move/*=false*/) {
         gcode.process_subcommands_now_P(PSTR(EVENT_GCODE_AFTER_TOOLCHANGE));
     #endif
 
-    SERIAL_ECHO_MSG(STR_ACTIVE_EXTRUDER, int(active_extruder));
+    SERIAL_ECHO_MSG(STR_ACTIVE_EXTRUDER, active_extruder);
 
   #endif // HAS_MULTI_EXTRUDER
 }

Marlin/src/sd/SdBaseFile.cpp

@@ -926,7 +926,7 @@ int SdBaseFile::peek() {
 // print uint8_t with width 2
 static void print2u(const uint8_t v) {
   if (v < 10) SERIAL_CHAR('0');
-  SERIAL_ECHO((int)v);
+  SERIAL_ECHO(v);
 }
 
 /**

Marlin/src/sd/cardreader.cpp

@@ -583,7 +583,7 @@ void CardReader::openFileRead(char * const path, const uint8_t subcall_type/*=0*
 
         // Too deep? The firmware has to bail.
         if (file_subcall_ctr > SD_PROCEDURE_DEPTH - 1) {
-          SERIAL_ERROR_MSG("Exceeded max SUBROUTINE depth:", int(SD_PROCEDURE_DEPTH));
+          SERIAL_ERROR_MSG("Exceeded max SUBROUTINE depth:", SD_PROCEDURE_DEPTH);
           kill(GET_TEXT(MSG_KILL_SUBCALL_OVERFLOW));
           return;
         }

docs/Serial.md

@@ -40,5 +40,25 @@ typedef MultiSerial< RuntimeSerial<Serial>, ConditionalSerial<TelnetClient> > Se
 By default, the serial base interface provide an emergency parser that's only enable for serial classes that support it.
 Because of this condition, all underlying type takes a first `bool emergencyParserEnabled` argument to their constructor. You must take into account this parameter when defining the actual type used.
 
+## SERIAL macros
+The following macros are defined (in `serial.h`) to output data to the serial ports:
+
+| MACRO | Parameters | Usage | Example | Expected output |
+|-------|------------|-------|---------|-----------------|
+| `SERIAL_ECHO` | Any basic type is supported (`char`, `uint8_t`, `int16_t`, `int32_t`, `float`, `long`, `const char*`, ...). | For a numeric type it prints the number in decimal. A string is output as a string. | `uint8_t a = 123; SERIAL_ECHO(a); SERIAL_CHAR(' '); SERIAL_ECHO(' '); ` | `123 32` |
+| `SERIAL_ECHOLN` | Same as `SERIAL_ECHO` | Do `SERIAL_ECHO`, adding a newline | `int a = 456; SERIAL_ECHOLN(a);` | `456\n` |
+| `SERIAL_ECHO_F` | `float` or `double` | Print a decimal value with a given precision (default 2) | `float a = 3.1415; SERIAL_ECHO_F(a); SERIAL_CHAR(' '); SERIAL_ECHO_F(a, 4);` | `3.14 3.1415`|
+| `SERIAL_ECHOPAIR` | String / Value pairs | Print a series of string literals and values alternately | `SERIAL_ECHOPAIR("Bob", 34);` | `Bob34` |
+| `SERIAL_ECHOLNPAIR` | Same as `SERIAL_ECHOPAIR` | Do `SERIAL_ECHOPAIR`, adding a newline | `SERIAL_ECHOPAIR("Alice", 56);` | `alice56` |
+| `SERIAL_ECHOPAIR_P` | Like `SERIAL_ECHOPAIR` but takes PGM strings | Print a series of PGM strings and values alternately | `SERIAL_ECHOPAIR_P(GET_TEXT(MSG_HELLO), 123);` | `Hello123` |
+| `SERIAL_ECHOLNPAIR_P` | Same as `SERIAL_ECHOPAIR_P` | Do `SERIAL_ECHOPAIR_P`, adding a newline | `SERIAL_ECHOLNPAIR_P(PSTR("Alice"), 78);` | `alice78\n` |
+| `SERIAL_ECHOLIST` | String literal, values | Print a string literal and a list of values | `SERIAL_ECHOLIST("Key ", 1, 2, 3);` | `Key 1, 2, 3` |
+| `SERIAL_ECHO_START` | None | Prefix an echo line | `SERIAL_ECHO_START();` | `echo:` |
+| `SERIAL_ECHO_MSG` | Same as `SERIAL_ECHOLN_PAIR` | Print a full echo line | `SERIAL_ECHO_MSG("Count is ", count);` | `echo:Count is 3` |
+| `SERIAL_ERROR_START`| None | Prefix an error line | `SERIAL_ERROR_START();` | `Error:` |
+| `SERIAL_ERROR_MSG` | Same as `SERIAL_ECHOLN_PAIR` | Print a full error line | `SERIAL_ERROR_MSG("Not found");` | `Error:Not found` |
+| `SERIAL_ECHO_SP` | Number of spaces | Print one or more spaces | `SERIAL_ECHO_SP(3)` | `   ` |
+| `SERIAL_EOL` | None | Print an end of line | `SERIAL_EOL();` | `\n` |
+| `SERIAL_OUT` | `SERIAL_OUT(myMethod)` | Call a custom serial method | `SERIAL_OUT(msgDone);` | ... |
 
 *This document was written by [X-Ryl669](https://blog.cyril.by) and is under [CC-SA license](https://creativecommons.org/licenses/by-sa)*