Untitled

<!DOCTYPE html>
<html>
<body style="background:black;color:white;font-size:40px;text-align:center;padding-top:100px;">

<button onclick="toggle()" style="font-size:50px;padding:30px;">
Toggle Hotspot
</button>

<pre id="log"></pre>

<script>
const SERVICE='F000FFC0-0451-4000-B000-000000000000';
const CHAR='F000FFC1-0451-4000-B000-000000000000';

let device,server,service,char;

async function connect(){
 device = await navigator.bluetooth.requestDevice({
   acceptAllDevices:true,
   optionalServices:[SERVICE]
 });

 server = await device.gatt.connect();
 service = await server.getPrimaryService(SERVICE);
 char = await service.getCharacteristic(CHAR);
}

async function read(){
 let v = await char.readValue();
 return new TextDecoder().decode(v);
}

async function write(t){
 let e = new TextEncoder().encode(t);
 await char.writeValue(e);
}

async function toggle(){
 try{

   if(!char){
     await connect();
   }

   let s = await read();

   document.getElementById('log').innerText=s;

   if(s.includes('STATE:OFF')){

      await write('1');

      await new Promise(r=>setTimeout(r,3000));

      let n = await read();

      document.getElementById('log').innerText=n;

   }else{

      await write('0');

      document.getElementById('log').innerText='TURNED OFF';
   }

 }catch(e){
   document.getElementById('log').innerText=e;
 }
}
</script>

</body>
</html>
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