Reduce storage requirements for strings, make some PGM

Marlin/M100_Free_Mem_Chk.cpp

     sp = top_of_stack();
     SERIAL_ECHOPGM("\nStack Pointer : ");
     prt_hex_word((unsigned int) sp);
-    SERIAL_ECHOPGM("\n");
+    SERIAL_EOL;
     sp = (unsigned char*)((unsigned long) sp | 0x000f);
     n = sp - ptr;
     //
     //
     while (ptr < sp) {
       prt_hex_word((unsigned int) ptr); // Print the address
-      SERIAL_ECHOPGM(":");
+      SERIAL_CHAR(':');
       for (i = 0; i < 16; i++) {      // and 16 data bytes
         prt_hex_byte(*(ptr + i));
-        SERIAL_ECHOPGM(" ");
+        SERIAL_CHAR(' ');
         delay(2);
       }
-      SERIAL_ECHO("|");         // now show where non 0xE5's are
+      SERIAL_CHAR('|');         // now show where non 0xE5's are
       for (i = 0; i < 16; i++) {
         delay(2);
         if (*(ptr + i) == 0xe5)
-          SERIAL_ECHOPGM(" ");
+          SERIAL_CHAR(' ');
         else
-          SERIAL_ECHOPGM("?");
+          SERIAL_CHAR('?');
       }
-      SERIAL_ECHO("\n");
+      SERIAL_EOL;
       ptr += 16;
       delay(2);
     }
-    SERIAL_ECHOLNPGM("Done.\n");
+    SERIAL_ECHOLNPGM("Done.");
     return;
   }
 #endif
           SERIAL_ECHOPAIR("Found ", j);
           SERIAL_ECHOPGM(" bytes free at 0x");
           prt_hex_word((int) ptr + i);
-          SERIAL_ECHOPGM("\n");
+          SERIAL_EOL;
           i += j;
           block_cnt++;
         }
       }
     }
     if (block_cnt > 1)
-      SERIAL_ECHOLNPGM("\nMemory Corruption detected in free memory area.\n");
-    SERIAL_ECHO("\nDone.\n");
+      SERIAL_ECHOLNPGM("\nMemory Corruption detected in free memory area.");
+    SERIAL_ECHOLNPGM("\nDone.");
     return;
   }
   //
     j = n / (x + 1);
     for (i = 1; i <= x; i++) {
       *(ptr + (i * j)) = i;
-      SERIAL_ECHO("\nCorrupting address: 0x");
+      SERIAL_ECHOPGM("\nCorrupting address: 0x");
       prt_hex_word((unsigned int)(ptr + (i * j)));
     }
     SERIAL_ECHOLNPGM("\n");

Marlin/Marlin.h

 #define SERIAL_PROTOCOL_F(x,y) MYSERIAL.print(x,y)
 #define SERIAL_PROTOCOLPGM(x) serialprintPGM(PSTR(x))
 #define SERIAL_PROTOCOLLN(x) do{ MYSERIAL.print(x); SERIAL_EOL; }while(0)
-#define SERIAL_PROTOCOLLNPGM(x) do{ serialprintPGM(PSTR(x)); SERIAL_EOL; }while(0)
+#define SERIAL_PROTOCOLLNPGM(x) do{ serialprintPGM(PSTR(x "\n")); }while(0)
 
+#define SERIAL_PROTOCOLPAIR(name, value) SERIAL_ECHOPAIR(name, value)
 
 extern const char errormagic[] PROGMEM;
 extern const char echomagic[] PROGMEM;

Marlin/Marlin_main.cpp

     do_blocking_move_to_xy(x - (X_PROBE_OFFSET_FROM_EXTRUDER), y - (Y_PROBE_OFFSET_FROM_EXTRUDER));
 
     #if ENABLED(DEBUG_LEVELING_FEATURE)
-      if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("> deploy_z_probe");
+      if (DEBUGGING(LEVELING)) SERIAL_ECHOPGM("> ");
     #endif
     deploy_z_probe();
 
   SERIAL_ECHO_START;
   SERIAL_ECHOPGM(MSG_UNKNOWN_COMMAND);
   SERIAL_ECHO(current_command);
-  SERIAL_ECHOPGM("\"\n");
+  SERIAL_ECHOLNPGM("\"");
 }
 
 #if ENABLED(HOST_KEEPALIVE_FEATURE)
     switch (state) {
       case MeshReport:
         if (mbl.has_mesh()) {
-          SERIAL_PROTOCOLPGM("State: ");
-          if (mbl.active())
-            SERIAL_PROTOCOLPGM("On");
-          else
-            SERIAL_PROTOCOLPGM("Off");
-          SERIAL_PROTOCOLPGM("\nNum X,Y: ");
-          SERIAL_PROTOCOL(MESH_NUM_X_POINTS);
-          SERIAL_PROTOCOLCHAR(',');
-          SERIAL_PROTOCOL(MESH_NUM_Y_POINTS);
-          SERIAL_PROTOCOLPGM("\nZ search height: ");
-          SERIAL_PROTOCOL(MESH_HOME_SEARCH_Z);
-          SERIAL_PROTOCOLPGM("\nZ offset: ");
-          SERIAL_PROTOCOL_F(mbl.z_offset, 5);
+          SERIAL_PROTOCOLPAIR("State: ", mbl.active() ? "On" : "Off");
+          SERIAL_PROTOCOLPAIR("\nNum X,Y: ", MESH_NUM_X_POINTS);
+          SERIAL_PROTOCOLCHAR(','); SERIAL_PROTOCOL(MESH_NUM_Y_POINTS);
+          SERIAL_PROTOCOLPAIR("\nZ search height: ", MESH_HOME_SEARCH_Z);
+          SERIAL_PROTOCOLPGM("\nZ offset: "); SERIAL_PROTOCOL_F(mbl.z_offset, 5);
           SERIAL_PROTOCOLLNPGM("\nMeasured points:");
           for (py = 0; py < MESH_NUM_Y_POINTS; py++) {
             for (px = 0; px < MESH_NUM_X_POINTS; px++) {
         if (code_seen('X')) {
           px = code_value_int() - 1;
           if (px < 0 || px >= MESH_NUM_X_POINTS) {
-            SERIAL_PROTOCOLPGM("X out of range (1-" STRINGIFY(MESH_NUM_X_POINTS) ").\n");
+            SERIAL_PROTOCOLLNPGM("X out of range (1-" STRINGIFY(MESH_NUM_X_POINTS) ").");
             return;
           }
         }
         else {
-          SERIAL_PROTOCOLPGM("X not entered.\n");
+          SERIAL_PROTOCOLLNPGM("X not entered.");
           return;
         }
         if (code_seen('Y')) {
           py = code_value_int() - 1;
           if (py < 0 || py >= MESH_NUM_Y_POINTS) {
-            SERIAL_PROTOCOLPGM("Y out of range (1-" STRINGIFY(MESH_NUM_Y_POINTS) ").\n");
+            SERIAL_PROTOCOLLNPGM("Y out of range (1-" STRINGIFY(MESH_NUM_Y_POINTS) ").");
             return;
           }
         }
         else {
-          SERIAL_PROTOCOLPGM("Y not entered.\n");
+          SERIAL_PROTOCOLLNPGM("Y not entered.");
           return;
         }
         if (code_seen('Z')) {
           z = code_value_axis_units(Z_AXIS);
         }
         else {
-          SERIAL_PROTOCOLPGM("Z not entered.\n");
+          SERIAL_PROTOCOLLNPGM("Z not entered.");
           return;
         }
         mbl.z_values[py][px] = z;
           z = code_value_axis_units(Z_AXIS);
         }
         else {
-          SERIAL_PROTOCOLPGM("Z not entered.\n");
+          SERIAL_PROTOCOLLNPGM("Z not entered.");
           return;
         }
         mbl.z_offset = z;
       #endif
 
       if (verbose_level > 0) {
-        SERIAL_PROTOCOLPGM("G29 Auto Bed Leveling\n");
-        if (dryrun) SERIAL_ECHOLNPGM("Running in DRY-RUN mode");
+        SERIAL_PROTOCOLLNPGM("G29 Auto Bed Leveling");
+        if (dryrun) SERIAL_PROTOCOLLNPGM("Running in DRY-RUN mode");
       }
 
       int auto_bed_leveling_grid_points = AUTO_BED_LEVELING_GRID_POINTS;
       #if DISABLED(DELTA)
         if (code_seen('P')) auto_bed_leveling_grid_points = code_value_int();
         if (auto_bed_leveling_grid_points < 2) {
-          SERIAL_PROTOCOLPGM("?Number of probed (P)oints is implausible (2 minimum).\n");
+          SERIAL_PROTOCOLLNPGM("?Number of probed (P)oints is implausible (2 minimum).");
           return;
         }
       #endif
         // Show the Topography map if enabled
         if (do_topography_map) {
 
-          SERIAL_PROTOCOLPGM(" \nBed Height Topography: \n");
-          SERIAL_PROTOCOLPGM("   +--- BACK --+\n");
-          SERIAL_PROTOCOLPGM("   |           |\n");
-          SERIAL_PROTOCOLPGM(" L |    (+)    | R\n");
-          SERIAL_PROTOCOLPGM(" E |           | I\n");
-          SERIAL_PROTOCOLPGM(" F | (-) N (+) | G\n");
-          SERIAL_PROTOCOLPGM(" T |           | H\n");
-          SERIAL_PROTOCOLPGM("   |    (-)    | T\n");
-          SERIAL_PROTOCOLPGM("   |           |\n");
-          SERIAL_PROTOCOLPGM("   O-- FRONT --+\n");
-          SERIAL_PROTOCOLPGM(" (0,0)\n");
+          SERIAL_PROTOCOLLNPGM("\nBed Height Topography:\n"
+                                 "   +--- BACK --+\n"
+                                 "   |           |\n"
+                                 " L |    (+)    | R\n"
+                                 " E |           | I\n"
+                                 " F | (-) N (+) | G\n"
+                                 " T |           | H\n"
+                                 "   |    (-)    | T\n"
+                                 "   |           |\n"
+                                 "   O-- FRONT --+\n"
+                                 " (0,0)");
 
           float min_diff = 999;
 
           } // yy
           SERIAL_EOL;
           if (verbose_level > 3) {
-            SERIAL_PROTOCOLPGM(" \nCorrected Bed Height vs. Bed Topology: \n");
+            SERIAL_PROTOCOLLNPGM("\nCorrected Bed Height vs. Bed Topology:");
 
             for (int yy = auto_bed_leveling_grid_points - 1; yy >= 0; yy--) {
               for (int xx = 0; xx < auto_bed_leveling_grid_points; xx++) {
 
     #if DISABLED(DELTA)
       if (verbose_level > 0)
-        planner.bed_level_matrix.debug(" \n\nBed Level Correction Matrix:");
+        planner.bed_level_matrix.debug("\n\nBed Level Correction Matrix:");
 
       if (!dryrun) {
         /**
     #ifdef Z_PROBE_END_SCRIPT
       #if ENABLED(DEBUG_LEVELING_FEATURE)
         if (DEBUGGING(LEVELING)) {
-          SERIAL_ECHO("Z Probe End Script: ");
+          SERIAL_ECHOPGM("Z Probe End Script: ");
           SERIAL_ECHOLNPGM(Z_PROBE_END_SCRIPT);
         }
       #endif
 
     int8_t verbose_level = code_seen('V') ? code_value_byte() : 1;
     if (verbose_level < 0 || verbose_level > 4) {
-      SERIAL_PROTOCOLPGM("?Verbose Level not plausible (0-4).\n");
+      SERIAL_PROTOCOLLNPGM("?Verbose Level not plausible (0-4).");
       return;
     }
 
     if (verbose_level > 0)
-      SERIAL_PROTOCOLPGM("M48 Z-Probe Repeatability test\n");
+      SERIAL_PROTOCOLLNPGM("M48 Z-Probe Repeatability test");
 
     int8_t n_samples = code_seen('P') ? code_value_byte() : 10;
     if (n_samples < 4 || n_samples > 50) {
-      SERIAL_PROTOCOLPGM("?Sample size not plausible (4-50).\n");
+      SERIAL_PROTOCOLLNPGM("?Sample size not plausible (4-50).");
       return;
     }
 
       }
     #else
       if (sqrt(X_probe_location * X_probe_location + Y_probe_location * Y_probe_location) > DELTA_PROBEABLE_RADIUS) {
-        SERIAL_PROTOCOLPGM("? (X,Y) location outside of probeable radius.\n");
+        SERIAL_PROTOCOLLNPGM("? (X,Y) location outside of probeable radius.");
         return;
       }
     #endif
     bool seen_L = code_seen('L');
     uint8_t n_legs = seen_L ? code_value_byte() : 0;
     if (n_legs > 15) {
-      SERIAL_PROTOCOLPGM("?Number of legs in movement not plausible (0-15).\n");
+      SERIAL_PROTOCOLLNPGM("?Number of legs in movement not plausible (0-15).");
       return;
     }
     if (n_legs == 1) n_legs = 2;
      * we don't want to use that as a starting point for each probe.
      */
     if (verbose_level > 2)
-      SERIAL_PROTOCOLPGM("Positioning the probe...\n");
+      SERIAL_PROTOCOLLNPGM("Positioning the probe...");
 
     #if ENABLED(DELTA)
       // we don't do bed level correction in M48 because we want the raw data when we probe
         if (verbose_level > 3) {
           SERIAL_ECHOPAIR("Starting radius: ", radius);
           SERIAL_ECHOPAIR("   angle: ", angle);
-          SERIAL_ECHO(" Direction: ");
-          if (dir > 0) SERIAL_ECHO("Counter ");
-          SERIAL_ECHOLN("Clockwise");
+          SERIAL_ECHOPGM(" Direction: ");
+          if (dir > 0) SERIAL_ECHOPGM("Counter-");
+          SERIAL_ECHOLNPGM("Clockwise");
         }
 
         for (uint8_t l = 0; l < n_legs - 1; l++) {
             }
           #endif
           if (verbose_level > 3) {
-            SERIAL_PROTOCOL("Going to:");
-            SERIAL_ECHOPAIR("x: ", X_current);
-            SERIAL_ECHOPAIR("y: ", Y_current);
-            SERIAL_ECHOPAIR("  z: ", current_position[Z_AXIS]);
+            SERIAL_PROTOCOLPGM("Going to:");
+            SERIAL_ECHOPAIR(" X", X_current);
+            SERIAL_ECHOPAIR(" Y", Y_current);
+            SERIAL_ECHOPAIR(" Z", current_position[Z_AXIS]);
             SERIAL_EOL;
           }
           do_blocking_move_to_xy(X_current, Y_current);
     }
     else if (servo_index >= 0) {
       SERIAL_ECHO_START;
-      SERIAL_ECHO(" Servo ");
+      SERIAL_ECHOPGM(" Servo ");
       SERIAL_ECHO(servo_index);
-      SERIAL_ECHO(": ");
+      SERIAL_ECHOPGM(": ");
       SERIAL_ECHOLN(servo[servo_index].read());
     }
   }
       thermalManager.updatePID();
       SERIAL_ECHO_START;
       #if ENABLED(PID_PARAMS_PER_HOTEND)
-        SERIAL_ECHO(" e:"); // specify extruder in serial output
+        SERIAL_ECHOPGM(" e:"); // specify extruder in serial output
         SERIAL_ECHO(e);
       #endif // PID_PARAMS_PER_HOTEND
-      SERIAL_ECHO(" p:");
+      SERIAL_ECHOPGM(" p:");
       SERIAL_ECHO(PID_PARAM(Kp, e));
-      SERIAL_ECHO(" i:");
+      SERIAL_ECHOPGM(" i:");
       SERIAL_ECHO(unscalePID_i(PID_PARAM(Ki, e)));
-      SERIAL_ECHO(" d:");
+      SERIAL_ECHOPGM(" d:");
       SERIAL_ECHO(unscalePID_d(PID_PARAM(Kd, e)));
       #if ENABLED(PID_ADD_EXTRUSION_RATE)
-        SERIAL_ECHO(" c:");
+        SERIAL_ECHOPGM(" c:");
         //Kc does not have scaling applied above, or in resetting defaults
         SERIAL_ECHO(PID_PARAM(Kc, e));
       #endif
     thermalManager.updatePID();
 
     SERIAL_ECHO_START;
-    SERIAL_ECHO(" p:");
+    SERIAL_ECHOPGM(" p:");
     SERIAL_ECHO(thermalManager.bedKp);
-    SERIAL_ECHO(" i:");
+    SERIAL_ECHOPGM(" i:");
     SERIAL_ECHO(unscalePID_i(thermalManager.bedKi));
-    SERIAL_ECHO(" d:");
+    SERIAL_ECHOPGM(" d:");
     SERIAL_ECHOLN(unscalePID_d(thermalManager.bedKd));
   }
 
 #if ENABLED(SCARA)
   bool SCARA_move_to_cal(uint8_t delta_x, uint8_t delta_y) {
     //SoftEndsEnabled = false;              // Ignore soft endstops during calibration
-    //SERIAL_ECHOLN(" Soft endstops disabled ");
+    //SERIAL_ECHOLNPGM(" Soft endstops disabled");
     if (IsRunning()) {
       //gcode_get_destination(); // For X Y Z E F
       delta[X_AXIS] = delta_x;
    * M360: SCARA calibration: Move to cal-position ThetaA (0 deg calibration)
    */
   inline bool gcode_M360() {
-    SERIAL_ECHOLN(" Cal: Theta 0 ");
+    SERIAL_ECHOLNPGM(" Cal: Theta 0");
     return SCARA_move_to_cal(0, 120);
   }
 
    * M361: SCARA calibration: Move to cal-position ThetaB (90 deg calibration - steps per degree)
    */
   inline bool gcode_M361() {
-    SERIAL_ECHOLN(" Cal: Theta 90 ");
+    SERIAL_ECHOLNPGM(" Cal: Theta 90");
     return SCARA_move_to_cal(90, 130);
   }
 
    * M362: SCARA calibration: Move to cal-position PsiA (0 deg calibration)
    */
   inline bool gcode_M362() {
-    SERIAL_ECHOLN(" Cal: Psi 0 ");
+    SERIAL_ECHOLNPGM(" Cal: Psi 0");
     return SCARA_move_to_cal(60, 180);
   }
 
    * M363: SCARA calibration: Move to cal-position PsiB (90 deg calibration - steps per degree)
    */
   inline bool gcode_M363() {
-    SERIAL_ECHOLN(" Cal: Psi 90 ");
+    SERIAL_ECHOLNPGM(" Cal: Psi 90");
     return SCARA_move_to_cal(50, 90);
   }
 
    * M364: SCARA calibration: Move to cal-position PSIC (90 deg to Theta calibration position)
    */
   inline bool gcode_M364() {
-    SERIAL_ECHOLN(" Cal: Theta-Psi 90 ");
+    SERIAL_ECHOLNPGM(" Cal: Theta-Psi 90");
     return SCARA_move_to_cal(45, 135);
   }
 
       else {
         SERIAL_ECHOPGM(MSG_Z_MIN);
         SERIAL_ECHO(Z_PROBE_OFFSET_RANGE_MIN);
+        SERIAL_CHAR(' ');
         SERIAL_ECHOPGM(MSG_Z_MAX);
         SERIAL_ECHO(Z_PROBE_OFFSET_RANGE_MAX);
       }
   #endif
 
   SERIAL_ECHO_START;
-  SERIAL_ECHO(MSG_ACTIVE_EXTRUDER);
+  SERIAL_ECHOPGM(MSG_ACTIVE_EXTRUDER);
   SERIAL_PROTOCOLLN((int)active_extruder);
 }
 

Marlin/cardreader.cpp

       if (!dir.open(parent, lfilename, O_READ)) {
         if (lsAction == LS_SerialPrint) {
           SERIAL_ECHO_START;
-          SERIAL_ECHOLN(MSG_SD_CANT_OPEN_SUBDIR);
+          SERIAL_ECHOPGM(MSG_SD_CANT_OPEN_SUBDIR);
           SERIAL_ECHOLN(lfilename);
         }
       }
     dirname_start = &name[1];
     while (dirname_start != NULL) {
       dirname_end = strchr(dirname_start, '/');
-      //SERIAL_ECHO("start:");SERIAL_ECHOLN((int)(dirname_start - name));
-      //SERIAL_ECHO("end  :");SERIAL_ECHOLN((int)(dirname_end - name));
+      //SERIAL_ECHOPGM("start:");SERIAL_ECHOLN((int)(dirname_start - name));
+      //SERIAL_ECHOPGM("end  :");SERIAL_ECHOLN((int)(dirname_end - name));
       if (dirname_end != NULL && dirname_end > dirname_start) {
         char subdirname[FILENAME_LENGTH];
         strncpy(subdirname, dirname_start, dirname_end - dirname_start);
           return;
         }
         else {
-          //SERIAL_ECHOLN("dive ok");
+          //SERIAL_ECHOLNPGM("dive ok");
         }
 
         curDir = &myDir;
       }
       else { // the remainder after all /fsa/fdsa/ is the filename
         fname = dirname_start;
-        //SERIAL_ECHOLN("remainder");
+        //SERIAL_ECHOLNPGM("remainder");
         //SERIAL_ECHOLN(fname);
         break;
       }
   if (read) {
     if (file.open(curDir, fname, O_READ)) {
       filesize = file.fileSize();
-      SERIAL_PROTOCOLPGM(MSG_SD_FILE_OPENED);
-      SERIAL_PROTOCOL(fname);
-      SERIAL_PROTOCOLPGM(MSG_SD_SIZE);
-      SERIAL_PROTOCOLLN(filesize);
+      SERIAL_PROTOCOLPAIR(MSG_SD_FILE_OPENED, fname);
+      SERIAL_PROTOCOLPAIR(MSG_SD_SIZE, filesize);
+      SERIAL_EOL;
       sdpos = 0;
 
       SERIAL_PROTOCOLLNPGM(MSG_SD_FILE_SELECTED);
       lcd_setstatus(longFilename[0] ? longFilename : fname);
     }
     else {
-      SERIAL_PROTOCOLPGM(MSG_SD_OPEN_FILE_FAIL);
-      SERIAL_PROTOCOL(fname);
-      SERIAL_PROTOCOLPGM(".\n");
+      SERIAL_PROTOCOLPAIR(MSG_SD_OPEN_FILE_FAIL, fname);
+      SERIAL_PROTOCOLCHAR('.');
+      SERIAL_EOL;
     }
   }
   else { //write
     if (!file.open(curDir, fname, O_CREAT | O_APPEND | O_WRITE | O_TRUNC)) {
-      SERIAL_PROTOCOLPGM(MSG_SD_OPEN_FILE_FAIL);
-      SERIAL_PROTOCOL(fname);
-      SERIAL_PROTOCOLPGM(".\n");
+      SERIAL_PROTOCOLPAIR(MSG_SD_OPEN_FILE_FAIL, fname);
+      SERIAL_PROTOCOLCHAR('.');
+      SERIAL_EOL;
     }
     else {
       saving = true;
-      SERIAL_PROTOCOLPGM(MSG_SD_WRITE_TO_FILE);
-      SERIAL_PROTOCOLLN(name);
+      SERIAL_PROTOCOLPAIR(MSG_SD_WRITE_TO_FILE, name);
       lcd_setstatus(fname);
     }
   }
     dirname_start = strchr(name, '/') + 1;
     while (dirname_start != NULL) {
       dirname_end = strchr(dirname_start, '/');
-      //SERIAL_ECHO("start:");SERIAL_ECHOLN((int)(dirname_start - name));
-      //SERIAL_ECHO("end  :");SERIAL_ECHOLN((int)(dirname_end - name));
+      //SERIAL_ECHOPGM("start:");SERIAL_ECHOLN((int)(dirname_start - name));
+      //SERIAL_ECHOPGM("end  :");SERIAL_ECHOLN((int)(dirname_end - name));
       if (dirname_end != NULL && dirname_end > dirname_start) {
         char subdirname[FILENAME_LENGTH];
         strncpy(subdirname, dirname_start, dirname_end - dirname_start);
         subdirname[dirname_end - dirname_start] = 0;
         SERIAL_ECHOLN(subdirname);
         if (!myDir.open(curDir, subdirname, O_READ)) {
-          SERIAL_PROTOCOLPGM("open failed, File: ");
-          SERIAL_PROTOCOL(subdirname);
+          SERIAL_PROTOCOLPAIR("open failed, File: ", subdirname);
           SERIAL_PROTOCOLCHAR('.');
           return;
         }
         else {
-          //SERIAL_ECHOLN("dive ok");
+          //SERIAL_ECHOLNPGM("dive ok");
         }
 
         curDir = &myDir;
       }
       else { // the remainder after all /fsa/fdsa/ is the filename
         fname = dirname_start;
-        //SERIAL_ECHOLN("remainder");
+        //SERIAL_ECHOLNPGM("remainder");
         //SERIAL_ECHOLN(fname);
         break;
       }

Marlin/configuration_store.cpp

   char stored_ver[4];
   char ver[4] = EEPROM_VERSION;
   EEPROM_READ_VAR(i, stored_ver); //read stored version
-  //  SERIAL_ECHOLN("Version: [" << ver << "] Stored version: [" << stored_ver << "]");
+  //  SERIAL_ECHO("Version: [" << ver << "] Stored version: [" << stored_ver << "]\n");
 
   if (strncmp(ver, stored_ver, 3) != 0) {
     Config_ResetDefault();
 
   CONFIG_ECHO_START;
   if (!forReplay) {
-    SERIAL_ECHOLNPGM("Home offset (mm):");
+    SERIAL_ECHOLNPGM("Home offset (mm)");
     CONFIG_ECHO_START;
   }
   SERIAL_ECHOPAIR("  M206 X", home_offset[X_AXIS]);
       SERIAL_ECHOLNPGM("Auto-Retract: S=0 to disable, 1 to interpret extrude-only moves as retracts or recoveries");
       CONFIG_ECHO_START;
     }
-    SERIAL_ECHOPAIR("  M209 S", (autoretract_enabled ? 1 : 0));
+    SERIAL_ECHOPAIR("  M209 S", autoretract_enabled ? 1 : 0);
     SERIAL_EOL;
 
   #endif // FWRETRACT

Marlin/endstops.cpp

 } // Endstops::report_state
 
 void Endstops::M119() {
-  SERIAL_PROTOCOLLN(MSG_M119_REPORT);
+  SERIAL_PROTOCOLLNPGM(MSG_M119_REPORT);
   #if HAS_X_MIN
     SERIAL_PROTOCOLPGM(MSG_X_MIN);
     SERIAL_PROTOCOLLN(((READ(X_MIN_PIN)^X_MIN_ENDSTOP_INVERTING) ? MSG_ENDSTOP_HIT : MSG_ENDSTOP_OPEN));

Marlin/language.h

 #define MSG_ENDSTOP_OPEN                    "open"
 #define MSG_HOTEND_OFFSET                   "Hotend offsets:"
 
-#define MSG_SD_CANT_OPEN_SUBDIR             "Cannot open subdir"
+#define MSG_SD_CANT_OPEN_SUBDIR             "Cannot open subdir "
 #define MSG_SD_INIT_FAIL                    "SD init fail"
 #define MSG_SD_VOL_INIT_FAIL                "volume.init failed"
 #define MSG_SD_OPENROOT_FAIL                "openRoot failed"

Marlin/stepper.cpp

 }
 
 void Stepper::microstep_readings() {
-  SERIAL_PROTOCOLPGM("MS1,MS2 Pins\n");
+  SERIAL_PROTOCOLLNPGM("MS1,MS2 Pins");
   SERIAL_PROTOCOLPGM("X: ");
   SERIAL_PROTOCOL(digitalRead(X_MS1_PIN));
   SERIAL_PROTOCOLLN(digitalRead(X_MS2_PIN));

Marlin/stepper_dac.cpp

     SERIAL_ECHOPAIR(" (",   dac_amps(2));
     SERIAL_ECHOPAIR(") E:", dac_perc(3));
     SERIAL_ECHOPAIR(" (",   dac_amps(3));
-    SERIAL_ECHOLN(")");
+    SERIAL_ECHOLNPGM(")");
   }
 
   void dac_commit_eeprom() {

Marlin/temperature.cpp

               bias = constrain(bias, 20, max_pow - 20);
               d = (bias > max_pow / 2) ? max_pow - 1 - bias : bias;
 
-              SERIAL_PROTOCOLPGM(MSG_BIAS); SERIAL_PROTOCOL(bias);
-              SERIAL_PROTOCOLPGM(MSG_D);    SERIAL_PROTOCOL(d);
-              SERIAL_PROTOCOLPGM(MSG_T_MIN);  SERIAL_PROTOCOL(min);
-              SERIAL_PROTOCOLPGM(MSG_T_MAX);  SERIAL_PROTOCOLLN(max);
+              SERIAL_PROTOCOLPAIR(MSG_BIAS, bias);
+              SERIAL_PROTOCOLPAIR(MSG_D, d);
+              SERIAL_PROTOCOLPAIR(MSG_T_MIN, min);
+              SERIAL_PROTOCOLPAIR(MSG_T_MAX, max);
               if (cycles > 2) {
                 Ku = (4.0 * d) / (3.14159265 * (max - min) / 2.0);
                 Tu = ((float)(t_low + t_high) / 1000.0);
-                SERIAL_PROTOCOLPGM(MSG_KU); SERIAL_PROTOCOL(Ku);
-                SERIAL_PROTOCOLPGM(MSG_TU); SERIAL_PROTOCOLLN(Tu);
+                SERIAL_PROTOCOLPAIR(MSG_KU, Ku);
+                SERIAL_PROTOCOLPAIR(MSG_TU, Tu);
                 workKp = 0.6 * Ku;
                 workKi = 2 * workKp / Tu;
                 workKd = workKp * Tu / 8;
                 SERIAL_PROTOCOLLNPGM(MSG_CLASSIC_PID);
-                SERIAL_PROTOCOLPGM(MSG_KP); SERIAL_PROTOCOLLN(workKp);
-                SERIAL_PROTOCOLPGM(MSG_KI); SERIAL_PROTOCOLLN(workKi);
-                SERIAL_PROTOCOLPGM(MSG_KD); SERIAL_PROTOCOLLN(workKd);
+                SERIAL_PROTOCOLPAIR(MSG_KP, workKp);
+                SERIAL_PROTOCOLPAIR(MSG_KI, workKi);
+                SERIAL_PROTOCOLPAIR(MSG_KD, workKd);
                 /**
                 workKp = 0.33*Ku;
                 workKi = workKp/Tu;
                 workKd = workKp*Tu/3;
-                SERIAL_PROTOCOLLNPGM(" Some overshoot ");
-                SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(workKp);
-                SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(workKi);
-                SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(workKd);
+                SERIAL_PROTOCOLLNPGM(" Some overshoot");
+                SERIAL_PROTOCOLPAIR(" Kp: ", workKp);
+                SERIAL_PROTOCOLPAIR(" Ki: ", workKi);
+                SERIAL_PROTOCOLPAIR(" Kd: ", workKd);
                 workKp = 0.2*Ku;
                 workKi = 2*workKp/Tu;
                 workKd = workKp*Tu/3;
-                SERIAL_PROTOCOLLNPGM(" No overshoot ");
-                SERIAL_PROTOCOLPGM(" Kp: "); SERIAL_PROTOCOLLN(workKp);
-                SERIAL_PROTOCOLPGM(" Ki: "); SERIAL_PROTOCOLLN(workKi);
-                SERIAL_PROTOCOLPGM(" Kd: "); SERIAL_PROTOCOLLN(workKd);
+                SERIAL_PROTOCOLLNPGM(" No overshoot");
+                SERIAL_PROTOCOLPAIR(" Kp: ", workKp);
+                SERIAL_PROTOCOLPAIR(" Ki: ", workKi);
+                SERIAL_PROTOCOLPAIR(" Kd: ", workKd);
                 */
               }
             }
 
         #if HAS_PID_FOR_BOTH
           const char* estring = hotend < 0 ? "bed" : "";
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_"); SERIAL_PROTOCOL(estring); SERIAL_PROTOCOLPGM("Kp "); SERIAL_PROTOCOLLN(workKp);
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_"); SERIAL_PROTOCOL(estring); SERIAL_PROTOCOLPGM("Ki "); SERIAL_PROTOCOLLN(workKi);
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_"); SERIAL_PROTOCOL(estring); SERIAL_PROTOCOLPGM("Kd "); SERIAL_PROTOCOLLN(workKd);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Kp ", workKp);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Ki ", workKi);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Kd ", workKd);
         #elif ENABLED(PIDTEMP)
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_Kp "); SERIAL_PROTOCOLLN(workKp);
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_Ki "); SERIAL_PROTOCOLLN(workKi);
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_Kd "); SERIAL_PROTOCOLLN(workKd);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Kp ", workKp);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Ki ", workKi);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Kd ", workKd);
         #else
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_bedKp "); SERIAL_PROTOCOLLN(workKp);
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_bedKi "); SERIAL_PROTOCOLLN(workKi);
-          SERIAL_PROTOCOLPGM("#define  DEFAULT_bedKd "); SERIAL_PROTOCOLLN(workKd);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKp ", workKp);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKi ", workKi);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKd ", workKd);
         #endif
 
         #define _SET_BED_PID() \
 
     #if ENABLED(PID_BED_DEBUG)
       SERIAL_ECHO_START;
-      SERIAL_ECHO(" PID_BED_DEBUG ");
-      SERIAL_ECHO(": Input ");
+      SERIAL_ECHOPGM(" PID_BED_DEBUG ");
+      SERIAL_ECHOPGM(": Input ");
       SERIAL_ECHO(current_temperature_bed);
-      SERIAL_ECHO(" Output ");
+      SERIAL_ECHOPGM(" Output ");
       SERIAL_ECHO(pid_output);
-      SERIAL_ECHO(" pTerm ");
+      SERIAL_ECHOPGM(" pTerm ");
       SERIAL_ECHO(pTerm_bed);
-      SERIAL_ECHO(" iTerm ");
+      SERIAL_ECHOPGM(" iTerm ");
       SERIAL_ECHO(iTerm_bed);
-      SERIAL_ECHO(" dTerm ");
+      SERIAL_ECHOPGM(" dTerm ");
       SERIAL_ECHOLN(dTerm_bed);
     #endif //PID_BED_DEBUG
 

Marlin/ultralcd.cpp

 
                 #if ENABLED(ENCODER_RATE_MULTIPLIER_DEBUG)
                   SERIAL_ECHO_START;
-                  SERIAL_ECHO("Enc Step Rate: ");
-                  SERIAL_ECHO(encoderStepRate);
-                  SERIAL_ECHO("  Multiplier: ");
-                  SERIAL_ECHO(encoderMultiplier);
-                  SERIAL_ECHO("  ENCODER_10X_STEPS_PER_SEC: ");
-                  SERIAL_ECHO(ENCODER_10X_STEPS_PER_SEC);
-                  SERIAL_ECHO("  ENCODER_100X_STEPS_PER_SEC: ");
-                  SERIAL_ECHOLN(ENCODER_100X_STEPS_PER_SEC);
+                  SERIAL_ECHOPAIR("Enc Step Rate: ", encoderStepRate);
+                  SERIAL_ECHOPAIR("  Multiplier: ", encoderMultiplier);
+                  SERIAL_ECHOPAIR("  ENCODER_10X_STEPS_PER_SEC: ", ENCODER_10X_STEPS_PER_SEC);
+                  SERIAL_ECHOPAIR("  ENCODER_100X_STEPS_PER_SEC: ", ENCODER_100X_STEPS_PER_SEC);
+                  SERIAL_EOL;
                 #endif //ENCODER_RATE_MULTIPLIER_DEBUG
               }