Added custom function handling

Author: vivian-ng

www/js/app.js

@@ -694,7 +694,7 @@ function process_socket_response(msg) {
         if (msg.startsWith("X:")) {
             process_Position(msg);
         }
-        if (msg.startsWith("esp3d:")) {
+        if (msg.startsWith("[esp3d]")) {
             process_Custom(msg); // handles custom messages sent via M118
         }
         if (msg.startsWith("ok")) {

www/js/custom.js

@@ -2,19 +2,29 @@
 // In gcode file, M118 can be used to send messages on serial.
 // This allows the microcontroller to communicate with hosts.
 // Example:
-//   M118 esp3d:<your message>
+//   M118 [esp3d]<your message>
 //      will send "esp3d:<your message>" over serial, which can be picked up by host
 //      to trigger certain actions.
+//   M118 [esp3d]<function call>
+//      will call the function, as long as a handler has been predefined to identify
+//      the call.
 
 function process_Custom(response) {
     var freq = 440;  // beep frequency on end of print
     var dur = 100;  // beep duration on end of print
-    if (response.startsWith("esp3d:eop")) {
+    response = response.replace("[esp3d]","");
+    if (response.startsWith("eop")) {
+        // Example 1
         // Sound to play on end of print
         // Triggered by message on serial terminal
-        // ESP3D:eop
-        //
-        // This message can be sent via M118.
+        // [ESP3D]eop
         beep(dur, freq);
-    }  
-}
+    }
+    if (response.startsWith("beep(")) {
+        // Example 2
+        // Call a function within webUI, in this case beep()
+        // Triggered by message on serial terminal
+        // [ESP3D]beep(100, 261)
+        eval(response);
+    }
+}