Merge pull request #3414 from thinkyhead/rc_host_timeout_mods

Host Keepalive configurable timeout with 2s default

Marlin/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/Marlin.h

   extern float zprobe_zoffset;
 #endif
 
+#if ENABLED(HOST_KEEPALIVE_FEATURE)
+  extern uint8_t host_keepalive_interval;
+#endif
+
 #if ENABLED(PREVENT_DANGEROUS_EXTRUDE)
   extern float extrude_min_temp;
 #endif

Marlin/Marlin_main.cpp

  * M110 - Set the current line number
  * M111 - Set debug flags with S<mask>. See flag bits defined in Marlin.h.
  * M112 - Emergency stop
+ * M113 - Get or set the timeout interval for Host Keepalive "busy" messages
  * M114 - Output current position to serial port
  * M115 - Capabilities string
  * M117 - Display a message on the controller screen
 
   static MarlinBusyState busy_state = NOT_BUSY;
   static millis_t next_busy_signal_ms = -1;
+  uint8_t host_keepalive_interval = DEFAULT_KEEPALIVE_INTERVAL;
   #define KEEPALIVE_STATE(n) do{ busy_state = n; }while(0)
 #else
   #define host_keepalive() ;
           break;
       }
     }
-    next_busy_signal_ms = ms + 10000UL; // "busy: ..." message every 10s
+    next_busy_signal_ms = host_keepalive_interval ? ms + 1000UL * host_keepalive_interval : -1;
   }
 
 #endif //HOST_KEEPALIVE_FEATURE
  */
 inline void gcode_M112() { kill(PSTR(MSG_KILLED)); }
 
+#if ENABLED(HOST_KEEPALIVE_FEATURE)
+
+  /**
+   * M113: Get or set Host Keepalive interval (0 to disable)
+   *
+   *   S<seconds> Optional. Set the keepalive interval.
+   */
+  inline void gcode_M113() {
+    if (code_seen('S')) {
+      host_keepalive_interval = (uint8_t)code_value_short();
+      NOMORE(host_keepalive_interval, 60);
+    }
+    else {
+      SERIAL_ECHO_START;
+      SERIAL_ECHOPAIR("M113 S", (unsigned long)host_keepalive_interval);
+      SERIAL_EOL;
+    }
+  }
+
+#endif
+
 #if ENABLED(BARICUDA)
 
   #if HAS_HEATER_1

Marlin/example_configurations/Felix/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/Felix/Configuration_DUAL.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/Hephestos/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/Hephestos_2/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/K8200/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/RigidBot/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/SCARA/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/TAZ4/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/WITBOX/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/adafruit/ST7565/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/delta/biv2.5/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/delta/generic/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/delta/kossel_mini/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/delta/kossel_pro/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/delta/kossel_xl/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/makibox/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher

Marlin/example_configurations/tvrrug/Round2/Configuration.h

 // Host Keepalive
 //
 // By default Marlin will send a busy status message to the host
-// every 10 seconds when it can't accept commands.
+// every couple of seconds when it can't accept commands.
 //
 //#define DISABLE_HOST_KEEPALIVE // Enable this option if your host doesn't like keepalive messages.
+#if DISABLED(DISABLE_HOST_KEEPALIVE)
+  #define DEFAULT_KEEPALIVE_INTERVAL 2 // Number of seconds between "busy" messages. Set with M113.
+#endif
 
 //
 // M100 Free Memory Watcher