diff --git a/Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp b/Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp
index 531dcadbfd..d66b2e7223 100644
--- a/Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp
+++ b/Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp
@@ -51,11 +51,7 @@
 
   #if ENABLED(NEWPANEL)
     void lcd_return_to_status();
-    void lcd_mesh_edit_setup(float initial);
-    float lcd_mesh_edit();
-    void lcd_z_offset_edit_setup(float);
     extern void _lcd_ubl_output_map_lcd();
-    float lcd_z_offset_edit();
   #endif
 
   extern float meshedit_done;
diff --git a/Marlin/src/gcode/temperature/M104_M109.cpp b/Marlin/src/gcode/temperature/M104_M109.cpp
index 9dfaacb56f..2cd5f28768 100644
--- a/Marlin/src/gcode/temperature/M104_M109.cpp
+++ b/Marlin/src/gcode/temperature/M104_M109.cpp
@@ -70,8 +70,10 @@ void GcodeSuite::M104() {
       }
     #endif
 
-    if (parser.value_celsius() > thermalManager.degHotend(e))
-      lcd_status_printf_P(0, PSTR("E%i %s"), e + 1, MSG_HEATING);
+    #if ENABLED(ULTRA_LCD)
+      if (parser.value_celsius() > thermalManager.degHotend(e))
+        lcd_status_printf_P(0, PSTR("E%i %s"), e + 1, MSG_HEATING);
+    #endif
   }
 
   #if ENABLED(AUTOTEMP)
@@ -124,7 +126,10 @@ void GcodeSuite::M109() {
         print_job_timer.start();
     #endif
 
-    if (thermalManager.isHeatingHotend(target_extruder)) lcd_status_printf_P(0, PSTR("E%i %s"), target_extruder + 1, MSG_HEATING);
+    #if ENABLED(ULTRA_LCD)
+      if (thermalManager.isHeatingHotend(target_extruder))
+        lcd_status_printf_P(0, PSTR("E%i %s"), target_extruder + 1, MSG_HEATING);
+    #endif
   }
   else return;
 
diff --git a/Marlin/src/lcd/malyanlcd.cpp b/Marlin/src/lcd/malyanlcd.cpp
new file mode 100644
index 0000000000..7bd8cffaa8
--- /dev/null
+++ b/Marlin/src/lcd/malyanlcd.cpp
@@ -0,0 +1,449 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * malyanlcd.cpp
+ *
+ * LCD implementation for Malyan's LCD, a separate ESP8266 MCU running
+ * on Serial1 for the M200 board. This module outputs a pseudo-gcode
+ * wrapped in curly braces which the LCD implementation translates into
+ * actual G-code commands.
+ *
+ * Added to Marlin for Mini/Malyan M200
+ * Unknown commands as of Jan 2018: {H:}
+ * Not currently implemented:
+ * {E:} when sent by LCD. Meaning unknown.
+ *
+ * Notes for connecting to boards that are not Malyan:
+ * The LCD is 3.3v, so if powering from a RAMPS 1.4 board or
+ * other 5v/12v board, use a buck converter to power the LCD and
+ * the 3.3v side of a logic level shifter. Aux1 on the RAMPS board
+ * has Serial1 and 12v, making it perfect for this.
+ * Copyright (c) 2017 Jason Nelson (xC0000005)
+ */
+
+#include "../inc/MarlinConfig.h"
+#include "../sd/cardreader.h"
+#include "../sd/SdFatConfig.h"
+#include "../module/temperature.h"
+#include "../module/planner.h"
+#include "../module/stepper.h"
+#include "../module/motion.h"
+#include "../module/probe.h"
+#include "../libs/duration_t.h"
+#include "../module/printcounter.h"
+#include "../gcode/gcode.h"
+#include "../gcode/queue.h"
+#include "../module/configuration_store.h"
+
+#include "../Marlin.h"
+
+#if ENABLED(MALYAN_LCD)
+
+// On the Malyan M200, this will be Serial1. On a RAMPS board,
+// it might not be.
+#define LCD_SERIAL Serial1
+
+// This is based on longest sys command + a filename, plus some buffer
+// in case we encounter some data we don't recognize
+// There is no evidence a line will ever be this long, but better safe than sory
+#define MAX_CURLY_COMMAND (32 + LONG_FILENAME_LENGTH) * 2
+
+// Track incoming command bytes from the LCD
+int inbound_count;
+
+// Everything written needs the high bit set.
+void write_to_lcd_P(const char * const message) {
+  char encoded_message[MAX_CURLY_COMMAND];
+  uint8_t message_length = min(strlen_P(message), sizeof(encoded_message));
+
+  for (uint8_t i = 0; i < message_length; i++)
+    encoded_message[i] = pgm_read_byte(message[i]) | 0x80;
+
+  LCD_SERIAL.Print::write(encoded_message, message_length);
+}
+
+void write_to_lcd(const char * const message) {
+  char encoded_message[MAX_CURLY_COMMAND];
+  const uint8_t message_length = min(strlen(message), sizeof(encoded_message));
+
+  for (uint8_t i = 0; i < message_length; i++)
+    encoded_message[i] = message[i] | 0x80;
+
+  LCD_SERIAL.Print::write(encoded_message, message_length);
+}
+
+/**
+ * Process an LCD 'C' command.
+ * These are currently all temperature commands
+ * {C:T0190}
+ * Set temp for hotend to 190
+ * {C:P050}
+ * Set temp for bed to 50
+ * 
+ * the command portion begins after the :
+ */
+void process_lcd_c_command(const char* command) {
+  switch (command[0]) {
+    case 'T': {
+      // M104 S<temperature>
+      char cmd[20];
+      sprintf_P(cmd, PSTR("M104 S%s"), command + 1);
+      enqueue_and_echo_command_now(cmd, false);
+    } break;
+
+    case 'P': {
+      // M140 S<temperature>
+      char cmd[20];
+      sprintf_P(cmd, PSTR("M140 S%s"), command + 1);
+      enqueue_and_echo_command_now(cmd, false);
+    } break;
+
+    default:
+      SERIAL_ECHOLNPAIR("UNKNOWN C COMMAND", command);
+      return;
+  }
+}
+
+/**
+ * Process an LCD 'B' command.
+ * {B:0} results in: {T0:008/195}{T1:000/000}{TP:000/000}{TQ:000C}{TT:000000}
+ * T0/T1 are hot end temperatures, TP is bed, TQ is percent, and TT is probably
+ * time remaining (HH:MM:SS). The UI can't handle displaying a second hotend,
+ * but the stock firmware always sends it, and it's always zero.
+ */
+void process_lcd_eb_command(const char* command) {
+  char elapsed_buffer[10];
+  duration_t elapsed;
+  bool has_days;
+  uint8_t len;
+  switch (command[0]) {
+    case '0': {
+      elapsed = print_job_timer.duration();
+      sprintf_P(elapsed_buffer, PSTR("%02u%02u%02u"), uint16_t(elapsed.hour()), uint16_t(elapsed.minute()) % 60UL, elapsed.second());
+
+      char message_buffer[MAX_CURLY_COMMAND];
+      sprintf_P(message_buffer,
+              PSTR("{T0:%03.0f/%03i}{T1:000/000}{TP:%03.0f/%03i}{TQ:%03i}{TT:%s}"),
+              thermalManager.degHotend(0),
+              thermalManager.degTargetHotend(0),
+              thermalManager.degBed(),
+              thermalManager.degTargetBed(),
+              card.percentDone(),
+              elapsed_buffer);
+      write_to_lcd(message_buffer);
+    } break;
+
+    default:
+      SERIAL_ECHOLNPAIR("UNKNOWN E/B COMMAND", command);
+      return;
+  }
+}
+
+/**
+ * Process an LCD 'J' command.
+ * These are currently all movement commands.
+ * The command portion begins after the :
+ * Move X Axis
+ * 
+ * {J:E}{J:X-200}{J:E}
+ * {J:E}{J:X+200}{J:E}
+ * X, Y, Z, A (extruder)
+ */
+void process_lcd_j_command(const char* command) {
+  static bool steppers_enabled = false;
+  char axis = command[0];
+
+  switch (axis) {
+    case 'E':
+      // enable or disable steppers
+      // switch to relative
+      enqueue_and_echo_command_now("G91");
+      enqueue_and_echo_command_now(steppers_enabled ? "M18" : "M17");
+      steppers_enabled = !steppers_enabled;
+      break;
+    case 'A':
+      axis = 'E';
+      // fallthru
+    case 'Y':
+    case 'Z':
+    case 'X': {
+      // G0 <AXIS><distance>
+      // The M200 class UI seems to send movement in .1mm values.
+      char cmd[20];
+      sprintf_P(cmd, PSTR("G1 %c%03.1f"), axis, atof(command + 1) / 10.0);
+      enqueue_and_echo_command_now(cmd);
+    } break;
+    default:
+      SERIAL_ECHOLNPAIR("UNKNOWN J COMMAND", command);
+      return;
+  }
+}
+
+/**
+ * Process an LCD 'P' command, related to homing and printing.
+ * Cancel:
+ * {P:X}
+ * 
+ * Home all axes:
+ * {P:H}
+ * 
+ * Print a file:
+ * {P:000}
+ * The File number is specified as a three digit value.
+ * Printer responds with:
+ * {PRINTFILE:Mini_SNES_Bottom.gcode}
+ * {SYS:BUILD}echo:Now fresh file: Mini_SNES_Bottom.gcode
+ * File opened: Mini_SNES_Bottom.gcode Size: 5805813
+ * File selected
+ * {SYS:BUILD}
+ * T:-2526.8 E:0
+ * T:-2533.0 E:0
+ * T:-2537.4 E:0
+ * Note only the curly brace stuff matters.
+ */
+void process_lcd_p_command(const char* command) {
+
+  switch (command[0]) {
+    case 'X':
+      // cancel print
+      write_to_lcd_P(PSTR("{SYS:CANCELING}"));
+      clear_command_queue();
+      quickstop_stepper();
+      print_job_timer.stop();
+      thermalManager.disable_all_heaters();
+      #if FAN_COUNT > 0
+        for (uint8_t i = 0; i < FAN_COUNT; i++) fanSpeeds[i] = 0;
+      #endif
+      wait_for_heatup = false;
+      write_to_lcd_P(PSTR("{SYS:STARTED}"));
+      break;
+    case 'H':
+      // Home all axis
+      enqueue_and_echo_command_now("G28");
+      break;
+    default: {
+      // Print file 000 - a three digit number indicating which
+      // file to print in the SD card. If it's a directory,
+      // then switch to the directory.
+
+      // Find the name of the file to print.
+      // It's needed to echo the PRINTFILE option.
+      // The {S:L} command should've ensured the SD card was mounted.
+      card.getfilename(atoi(command));
+
+      // There may be a difference in how V1 and V2 LCDs handle subdirectory
+      // prints. Investigate more. This matches the V1 motion controller actions
+      // but the V2 LCD switches to "print" mode on {SYS:DIR} response.
+      if (card.filenameIsDir) {
+        card.chdir(card.filename);
+        write_to_lcd_P(PSTR("{SYS:DIR}"));
+      }
+      else {
+        char message_buffer[MAX_CURLY_COMMAND];
+        sprintf_P(message_buffer, PSTR("{PRINTFILE:%s}"), card.filename);
+        write_to_lcd(message_buffer);
+        write_to_lcd_P(PSTR("{SYS:BUILD}"));
+        card.openAndPrintFile(card.filename);
+      }
+    } break; // default
+  } // switch
+}
+
+/**
+ * Handle an lcd 'S' command
+ * {S:I} - Temperature request
+ * {T0:999/000}{T1:000/000}{TP:004/000}
+ * 
+ * {S:L} - File Listing request
+ * Printer Response:
+ * {FILE:buttons.gcode}
+ * {FILE:update.bin}
+ * {FILE:nupdate.bin}
+ * {FILE:fcupdate.flg}
+ * {SYS:OK}
+ */
+void process_lcd_s_command(const char* command) {
+  switch (command[0]) {
+    case 'I': {
+      // temperature information
+      char message_buffer[MAX_CURLY_COMMAND];
+      sprintf_P(message_buffer, PSTR("{T0:%03.0f/%03i}{T1:000/000}{TP:%03.0f/%03i}"),
+        thermalManager.degHotend(0), thermalManager.degTargetHotend(0),
+        thermalManager.degBed(), thermalManager.degTargetBed()
+      );
+      write_to_lcd(message_buffer);
+    } break;
+
+    case 'H':
+      // Home all axis
+      enqueue_and_echo_command("G28", false);
+      break;
+
+    case 'L': {
+      if (!card.cardOK) card.initsd();
+
+      // A more efficient way to do this would be to
+      // implement a callback in the ls_SerialPrint code, but
+      // that requires changes to the core cardreader class that
+      // would not benefit the majority of users. Since one can't
+      // select a file for printing during a print, there's
+      // little reason not to do it this way.
+      char message_buffer[MAX_CURLY_COMMAND];
+      uint16_t file_count = card.get_num_Files();
+      for (uint16_t i = 0; i < file_count; i++) {
+        card.getfilename(i);
+        sprintf_P(message_buffer, card.filenameIsDir ? PSTR("{DIR:%s}") : PSTR("{FILE:%s}"), card.filename);
+        write_to_lcd(message_buffer);
+      }
+
+      write_to_lcd_P(PSTR("{SYS:OK}"));
+    } break;
+
+    default:
+      SERIAL_ECHOLNPAIR("UNKNOWN S COMMAND", command);
+      return;
+  }
+}
+
+/**
+ * Receive a curly brace command and translate to G-code.
+ * Currently {E:0} is not handled. Its function is unknown,
+ * but it occurs during the temp window after a sys build.
+ */
+void process_lcd_command(const char* command) {
+  const char *current = command;
+
+  current++; // skip the leading {. The trailing one is already gone.
+  byte command_code = *current++;
+  if (*current != ':') {
+    SERIAL_ECHOLNPAIR("UNKNOWN COMMAND FORMAT", command);
+    return;
+  }
+
+  current++; // skip the :
+
+  switch (command_code) {
+    case 'S':
+      process_lcd_s_command(current);
+      break;
+    case 'J':
+      process_lcd_j_command(current);
+      break;
+    case 'P':
+      process_lcd_p_command(current);
+      break;
+    case 'C':
+      process_lcd_c_command(current);
+      break;
+    case 'B':
+    case 'E':
+      process_lcd_eb_command(current);
+      break;
+    default:
+      SERIAL_ECHOLNPAIR("UNKNOWN COMMAND", command);
+      return;
+  }
+}
+
+/**
+ * UC means connected.
+ * UD means disconnected
+ * The stock firmware considers USB initialied as "connected."
+ */
+void update_usb_status(const bool forceUpdate) {
+  static bool last_usb_connected_status = false;
+  // This is mildly different than stock, which
+  // appears to use the usb discovery status.
+  // This is more logical.
+  if (last_usb_connected_status != Serial || forceUpdate) {
+    last_usb_connected_status =  Serial;
+    write_to_lcd_P(last_usb_connected_status ? PSTR("{R:UC}\r\n") : PSTR("{R:UD}\r\n"));
+  }
+}
+
+/**
+ * - from printer on startup:
+ * {SYS:STARTED}{VER:29}{SYS:STARTED}{R:UD}
+ * The optimize attribute fixes a register Compile
+ * error for amtel.
+ */
+void lcd_update() _O2 {
+  static char inbound_buffer[MAX_CURLY_COMMAND];
+
+  // First report USB status.
+  update_usb_status(false);
+
+  // now drain commands...
+  while (LCD_SERIAL.available()) {
+    const byte b = (byte)LCD_SERIAL.read() & 0x7F;
+    inbound_buffer[inbound_count++] = b;
+    if (b == '}' || inbound_count == sizeof(inbound_buffer) - 1) {
+      inbound_buffer[inbound_count - 1] = '\0';
+      process_lcd_command(inbound_buffer);
+      inbound_count = 0;
+      inbound_buffer[0] = 0;
+    }
+  }
+
+  // If there's a print in progress, we need to emit the status as
+  // {TQ:<PERCENT>}
+  if (card.sdprinting) {
+    // We also need to send: T:-2538.0 E:0
+    // I have no idea what this means.
+    char message_buffer[10];
+    sprintf_P(message_buffer, PSTR("{TQ:%03i}"), card.percentDone());
+    write_to_lcd(message_buffer);
+  }
+}
+
+/**
+ * The Malyan LCD actually runs as a separate MCU on Serial 1.
+ * This code's job is to siphon the weird curly-brace commands from
+ * it and translate into gcode, which then gets injected into
+ * the command queue where possible.
+ */
+void lcd_init() {
+  inbound_count = 0;
+  LCD_SERIAL.begin(500000);
+
+  // Signal init
+  write_to_lcd_P(PSTR("{SYS:STARTED}\r\n"));
+
+  // send a version that says "unsuported"
+  write_to_lcd_P(PSTR("{VER:66}\r\n"));
+
+  // No idea why it does this twice.
+  write_to_lcd_P(PSTR("{SYS:STARTED}\r\n"));
+  update_usb_status(true);
+}
+
+/**
+ * Set an alert.
+ */
+void lcd_setalertstatusPGM(const char* message) {
+  char message_buffer[MAX_CURLY_COMMAND];
+  sprintf_P(message_buffer, PSTR("{E:%s}"), message);
+  write_to_lcd(message_buffer);
+}
+
+#endif // Malyan LCD
diff --git a/Marlin/src/lcd/ultralcd.cpp b/Marlin/src/lcd/ultralcd.cpp
index 75950fd7dd..bbcf4156ef 100644
--- a/Marlin/src/lcd/ultralcd.cpp
+++ b/Marlin/src/lcd/ultralcd.cpp
@@ -1208,7 +1208,7 @@ void kill_screen(const char* lcd_msg) {
       return mesh_edit_value;
     }
 
-    void lcd_mesh_edit_setup(const float initial) {
+    void lcd_mesh_edit_setup(const float &initial) {
       mesh_edit_value = mesh_edit_accumulator = initial;
       lcd_goto_screen(_lcd_mesh_edit_NOP);
     }
@@ -1222,7 +1222,7 @@ void kill_screen(const char* lcd_msg) {
       return mesh_edit_value;
     }
 
-    void lcd_z_offset_edit_setup(float initial) {
+    void lcd_z_offset_edit_setup(const float &initial) {
       mesh_edit_value = mesh_edit_accumulator = initial;
       lcd_goto_screen(_lcd_z_offset_edit);
     }
diff --git a/Marlin/src/lcd/ultralcd.h b/Marlin/src/lcd/ultralcd.h
index 27103faff0..920cd68a16 100644
--- a/Marlin/src/lcd/ultralcd.h
+++ b/Marlin/src/lcd/ultralcd.h
@@ -25,6 +25,11 @@
 
 #include "../inc/MarlinConfig.h"
 
+#if ENABLED(ULTRA_LCD) || ENABLED(MALYAN_LCD)
+  void lcd_init();
+  bool lcd_detected();
+#endif
+
 #if ENABLED(ULTRA_LCD)
 
   #include "../Marlin.h"
@@ -53,16 +58,14 @@
   int16_t lcd_strlen(const char* s);
   int16_t lcd_strlen_P(const char* s);
   void lcd_update();
-  void lcd_init();
   bool lcd_hasstatus();
   void lcd_setstatus(const char* message, const bool persist=false);
   void lcd_setstatusPGM(const char* message, const int8_t level=0);
   void lcd_setalertstatusPGM(const char* message);
-  void lcd_status_printf_P(const uint8_t level, const char * const fmt, ...);
   void lcd_reset_alert_level();
+  void lcd_status_printf_P(const uint8_t level, const char * const fmt, ...);
   void lcd_kill_screen();
   void kill_screen(const char* lcd_msg);
-  bool lcd_detected(void);
 
   extern uint8_t lcdDrawUpdate;
   inline void lcd_refresh() { lcdDrawUpdate = LCDVIEW_CLEAR_CALL_REDRAW; }
@@ -131,9 +134,9 @@
     #endif
 
     #if ENABLED(AUTO_BED_LEVELING_UBL)
-      void lcd_mesh_edit_setup(float initial);
+      void lcd_mesh_edit_setup(const float &initial);
       float lcd_mesh_edit();
-      void lcd_z_offset_edit_setup(float);
+      void lcd_z_offset_edit_setup(const float &initial);
       float lcd_z_offset_edit();
     #endif
 
@@ -224,17 +227,17 @@
 
   constexpr bool lcd_wait_for_move = false;
 
-  inline void lcd_update() {}
   inline void lcd_init() {}
+  inline bool lcd_detected() { return true; }
+  inline void lcd_update() {}
+  inline void lcd_refresh() {}
+  inline void lcd_buttons_update() {}
   inline bool lcd_hasstatus() { return false; }
   inline void lcd_setstatus(const char* const message, const bool persist=false) { UNUSED(message); UNUSED(persist); }
   inline void lcd_setstatusPGM(const char* const message, const int8_t level=0) { UNUSED(message); UNUSED(level); }
-  inline void lcd_setalertstatusPGM(const char* message) { UNUSED(message); }
   inline void lcd_status_printf_P(const uint8_t level, const char * const fmt, ...) { UNUSED(level); UNUSED(fmt); }
-  inline void lcd_buttons_update() {}
+  inline void lcd_setalertstatusPGM(const char* message) { UNUSED(message); }
   inline void lcd_reset_alert_level() {}
-  inline bool lcd_detected() { return true; }
-  inline void lcd_refresh() {}
 
 #endif // ULTRA_LCD