re-enabled heaterpower as storage for the current storage of the heater PWM duty cycle.

the M301 now returns the current PID settings of the machine.
M105 returns heating pwm duty cylce as "@:"

Marlin/Marlin.pde

@@ -647,33 +647,24 @@ inline void process_commands()
       break;
     case 105: // M105
       //SERIAL_ECHOLN(freeMemory());
-      #if (TEMP_0_PIN > -1) || defined (HEATER_USES_AD595)
+          
-        tt = degHotend0();
-      #endif
-      #if TEMP_1_PIN > -1
-          bt = degBed();
-      #endif
       #if (TEMP_0_PIN > -1) || defined (HEATER_USES_AD595)
         SERIAL_PROTOCOLPGM("ok T:");
-        SERIAL_PROTOCOL(tt); 
+        SERIAL_PROTOCOL( degHotend0()); 
         #if TEMP_1_PIN > -1 
-          #ifdef PIDTEMP
+          SERIAL_PROTOCOLPGM(" B:");  
-            SERIAL_PROTOCOL(" B:");
+          SERIAL_PROTOCOL(degBed());
-            #if TEMP_1_PIN > -1
+        #endif //TEMP_1_PIN
-              SERIAL_PROTOCOLLN(bt); 
+      #else
-            #else
+        SERIAL_ERROR_START;
-              SERIAL_PROTOCOLLN(HeaterPower); 
+        SERIAL_ERRORLNPGM("No thermistors - no temp");
-            #endif
-          #else //not PIDTEMP
-            SERIAL_PROTOCOLLN("");
-           #endif //PIDTEMP
-         #else
-            SERIAL_PROTOCOLLN("");
-          #endif //TEMP_1_PIN
-        #else
-          SERIAL_ERROR_START;
-          SERIAL_ERRORLNPGM("No thermistors - no temp");
       #endif
+      #ifdef PIDTEMP
+        SERIAL_PROTOCOLPGM(" @:");
+        SERIAL_PROTOCOL( HeaterPower); 
+       
+      #endif
+        SERIAL_PROTOCOLLN("");
       return;
       break;
     case 109: 
@@ -901,6 +892,21 @@ inline void process_commands()
       if(code_seen('P')) Kp = code_value();
       if(code_seen('I')) Ki = code_value()*PID_dT;
       if(code_seen('D')) Kd = code_value()/PID_dT;
+      #ifdef PID_ADD_EXTRUSION_RATE
+      if(code_seen('C')) Kc = code_value();
+      #endif
+      SERIAL_PROTOCOL("ok p:");
+      SERIAL_PROTOCOL(Kp);
+      SERIAL_PROTOCOL(" i:");
+      SERIAL_PROTOCOL(Ki/PID_dT);
+      SERIAL_PROTOCOL(" d:");
+      SERIAL_PROTOCOL(Kd*PID_dT);
+      #ifdef PID_ADD_EXTRUSION_RATE
+      SERIAL_PROTOCOL(" c:");
+      SERIAL_PROTOCOL(Kc*PID_dT);
+      #endif
+      SERIAL_PROTOCOLLN("");
+      
       break;
     #endif //PIDTEMP
     case 500: // Store settings in EEPROM

Marlin/temperature.cpp

@@ -156,6 +156,7 @@ void manage_heater()
             pTerm+=Kc*current_block->speed_e; //additional heating if extrusion speed is high
           #endif
           pid_output = constrain(pTerm + iTerm - dTerm, 0, PID_MAX);
+          HeaterPower=pid_output;
         }
     #endif //PID_OPENLOOP
     #ifdef PID_DEBUG