Update settings.html

settings.html

@@ -163,10 +163,10 @@ input[type="number"] {
   </script>
 
   <script>
-  document.getElementById("EC_set_but").addEventListener("click", function() {
-    var pHValue = document.getElementById("EC_set").value;
+  document.getElementById("ed_set_but").addEventListener("click", function() {
+    var ecValue = document.getElementById("ec_set").value;
     var xhr = new XMLHttpRequest();
-    xhr.open("GET", "/EC_set?value=" + pHValue, true);
+    xhr.open("GET", "/EC_set?value=" + ecValue, true);
     xhr.send();
 });
   </script>