Merge pull request #71 from vivian-ng/2.1

Added custom message handling

Author: luc-github

www/index.html

@@ -112,6 +112,7 @@ <H3>Loading....</H3>
     <script src="js/dropmenu.js"></script>
     <script src="js/localstorage.js"></script>
     <script src="js/UIdisableddlg.js"></script>
+    <script src="js/custom.js"></script>
     <!--endRemoveIf(cleanheader)-->
     <!-- smoosh -->
     <script src="js/app.js"></script>

www/js/app.js

@@ -694,6 +694,9 @@ function process_socket_response(msg) {
         if (msg.startsWith("X:")) {
             process_Position(msg);
         }
+        if (msg.startsWith("[esp3d]")) {
+            process_Custom(msg); // handles custom messages sent via M118
+        }
         if (msg.startsWith("ok")) {
             if (socket_is_settings) {
                 //update settings

www/js/custom.js

@@ -0,0 +1,30 @@
+// Functions to handle custom messages sent via serial.
+// 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>
+//      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
+    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
+        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);
+    }
+}