Added OTA from gravmon.com

html/config.htm

@@ -474,6 +474,30 @@
               </div>
             </div>
 
+            <div class="row mb-3">
+              <div class="col-sm-4 offset-sm-2">
+                <div class="form-check">
+                  <input class="form-check-input" type="checkbox" name="gravitymon-com" id="gravitymon-com" data-bs-toggle="tooltip" title="If enabled gravitymon.com will be checked for new versions.">
+                  <label class="form-check-label" for="gravitymon-com">OTA from gravitymon.com</label>
+                </div>
+              </div>
+            </div>
+
+            <script>
+              var gravitymonUrl = "https://www.gravitymon.com/firmware/";
+
+              $("#gravitymon-com").click(function(e){
+                var b = $("#gravitymon-com").is(":checked");
+
+                if ( b ) {
+                  $("#ota-url").val(gravitymonUrl);
+                  $("#ota-url").prop("disabled", true);
+                } else {
+                  $("#ota-url").prop("disabled", false);
+                }
+              });
+            </script> 
+
             <div class="row mb-3">
               <div class="col-sm-8 offset-sm-2">
                 <button type="submit" class="btn btn-primary" id="hardware-btn" data-bs-toggle="tooltip" title="Save changes in this section">Save</button>
@@ -804,14 +828,14 @@
       $("#test-btn2").prop("disabled", b);
       $("#advanced-btn").prop("disabled", b);
 
-      checkAdvancedSection( b );
+      checkAdvancedSection();
     }
 
     $("#adv-config").click(function(e){
       checkAdvancedSection();
     });
 
-    function checkAdvancedSection( b ) {
+    function checkAdvancedSection() {
       var b = $("#adv-config").is(":checked");
    
       $("#advanced-btn").prop("disabled", b);
@@ -899,6 +923,12 @@
         if( cfg["gravity-format"] == "G" ) $("#gravity-format-g").click();
         else $("#gravity-format-p").click();
         $("#ota-url").val(cfg["ota-url"]);
+
+        if( cfg["ota-url"] == gravitymonUrl) {
+          $("#gravitymon-com").prop( "checked", true );
+          $("#ota-url").prop("disabled", true);
+        }
+
         $("#token").val(cfg["token"]);
         $("#token2").val(cfg["token2"]);
         $("#http-push").val(cfg["http-push"]);