naus3a/index.html

## index.html
<!DOCTYPE html>
<head>
    <script src="https://cdn.socket.io/3.1.3/socket.io.min.js" integrity="sha384-cPwlPLvBTa3sKAgddT6krw0cJat7egBga3DJepJyrLl4Q9/5WLra3rrnMcyTyOnh" crossorigin="anonymous"></script>

</head>
<body>
    <script>
        function sha256(message) {
            // encode as UTF-8
            const msgBuffer = new TextEncoder().encode(message);

            // hash the message
            const hashBuffer = crypto.subtle.digest('SHA-256', msgBuffer);

            // convert ArrayBuffer to Array
            const hashArray = Array.from(new Uint8Array(hashBuffer));

            // convert bytes to hex string
            const hashHex = hashArray.map(b => ('00' + b.toString(16)).slice(-2)).join('');
            return hashHex;
        }

        let key = "XXXXXXXXXX";

        let payload = {
            'type': 'sensor',
            'sensor_serial': 'nau1',
            '_dev_sensor_private_key': 'XXXXXXXXXXX'
        };

        let time = Math.floor(Date.now() / 1000);

        let plainSignature = time + "_" + btoa(JSON.stringify(payload)) + "_" + key;
        let signature = sha256(plainSignature);

        let token = {
            'payload': payload,
            'time': time,
            'signature': signature
        };

        const socket = io("https://websockets.getportal.ai", {
            autoconnect: false,
            transport: "websocket",
            EIO: 3,
            token: JSON.stringify(token)
        });

        socket.on("connect_error", (err) => {
            console.log(err.message);
        });

        socket.on("connect", ()=>{
            console.log("connected");
        });

        socket.connect();
    </script>
</body>
	<!DOCTYPE html>
	<head>
	<script src="https://cdn.socket.io/3.1.3/socket.io.min.js" integrity="sha384-cPwlPLvBTa3sKAgddT6krw0cJat7egBga3DJepJyrLl4Q9/5WLra3rrnMcyTyOnh" crossorigin="anonymous"></script>

	</head>
	<body>
	<script>
	function sha256(message) {
	// encode as UTF-8
	const msgBuffer = new TextEncoder().encode(message);

	// hash the message
	const hashBuffer = crypto.subtle.digest('SHA-256', msgBuffer);

	// convert ArrayBuffer to Array
	const hashArray = Array.from(new Uint8Array(hashBuffer));

	// convert bytes to hex string
	const hashHex = hashArray.map(b => ('00' + b.toString(16)).slice(-2)).join('');
	return hashHex;
	}

	let key = "XXXXXXXXXX";

	let payload = {
	'type': 'sensor',
	'sensor_serial': 'nau1',
	'_dev_sensor_private_key': 'XXXXXXXXXXX'
	};

	let time = Math.floor(Date.now() / 1000);

	let plainSignature = time + "_" + btoa(JSON.stringify(payload)) + "_" + key;
	let signature = sha256(plainSignature);

	let token = {
	'payload': payload,
	'time': time,
	'signature': signature
	};

	const socket = io("https://websockets.getportal.ai", {
	autoconnect: false,
	transport: "websocket",
	EIO: 3,
	token: JSON.stringify(token)
	});

	socket.on("connect_error", (err) => {
	console.log(err.message);
	});

	socket.on("connect", ()=>{
	console.log("connected");
	});

	socket.connect();
	</script>
	</body>