muele-marlin/Marlin/src/gcode/temperature/M105.h

/**
 * 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/>.
 *
 */

/**
 * M105: Read hot end and bed temperature
 */
void gcode_M105() {
  if (gcode.get_target_extruder_from_command()) return;

  #if HAS_TEMP_HOTEND || HAS_TEMP_BED
    SERIAL_PROTOCOLPGM(MSG_OK);
    thermalManager.print_heaterstates();
  #else // !HAS_TEMP_HOTEND && !HAS_TEMP_BED
    SERIAL_ERROR_START();
    SERIAL_ERRORLNPGM(MSG_ERR_NO_THERMISTORS);
  #endif

  SERIAL_EOL();
}