wbt.js

var characteristic;

var color_service_uuid        = "f815e810-456c-6761-746f-4d756e696368";
var color_characteristic_uuid = "f815e811-456c-6761-746f-4d756e696368";

function findLamp() {
    try {
        console.log("findLamp");
        var options = {filters: [{namePrefix: "Avea", services: [color_service_uuid]}], optinalServices: []};
        window.navigator.bluetooth.requestDevice(options)
        .then(device => device.gatt.connect())
        .then(gatt => gatt.getPrimaryService(color_service_uuid))
        .then(service => {
            console.log('Getting Service...');
            console.log('> UUID:       ' + service.uuid);
            console.log('> Is primary: ' + service.isPrimary);
            console.log('')
            console.log('Getting Characteristic...');
            service.getCharacteristic(color_characteristic_uuid)
            .then(async char => {
                characteristic = char;
                console.log('> Characteristic UUID:    ' + characteristic.uuid);
				var button = document.getElementById("connectbutton");
				subscribeToBulbNotifications();
				button.innerHTML = "Connected";
				button.style.backgroundColor = "green";
				await sleep(500);
				await setbrightnessSilderValue();
            });
        });
    } catch(err) {
        console.log(err);
        alert(err);
    }
}

function writeCharacteristic(value) {
    if(!characteristic) {
        console.log('No characteristic!');
        return;
    }
    try {
        characteristic.writeValue(Uint8Array.from(value))
        .then(() => console.log("changed value to: "+value));
    } catch(err) {
        console.log(err);
        alert(err);
    }
}