change read sensors, trigger via web possible, modify js to fetch with HTTP_POST

data/input.js

@@ -35,7 +35,7 @@ function rangeToOutput(range, output) {
   document.getElementById(range).oninput = function () {
     document.getElementById(output).innerHTML = this.value;
     // add to pending range changes
-    rangeValues[range] = val;
+    rangeValues[this.id] = this.value;
   }
 }
 
@@ -75,7 +75,13 @@ document.addEventListener('DOMContentLoaded', () => {
 // use data- attributes for action
 document.querySelectorAll('.control').forEach((button) => {
   button.onclick = () => {
-    fetch(`/action=${button.dataset.action}`)
+    fetch(`/action`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/x-www-form-urlencoded',
+      },
+      body: `control=${button.dataset.action}`
+    })
       .then(response => console.log(response))
       .catch(error => console.log('Error:', error));
   }