Change action button color to green once connected to cadence sensor

static/js/BLE.js

@@ -24,6 +24,9 @@ async function connect(props) {
   console.log("> Notifications started");
   characteristic.addEventListener("characteristicvaluechanged", props.onChange);
   console.log("> Characteristic value changed event listener added");
+
+  btn.classList.remove("bg-red-600");
+  btn.classList.add("bg-green-600");
   /*
   socket = io({
     reconnection: true,