bluetooth.js

function connectToBle() {
  // Connect to a device by passing the service UUID
  blueTooth.connect("a5f125c0-7cec-4334-9214-58cffb8706c0", gotCharacteristics);
  console.log('trying to connect');
}

function disconnectBle() {
  blueTooth.disconnect();
}

// A function that will be called once got characteristics
function gotCharacteristics(error, characteristics) {
  console.log('looking for characteristics');
  if (error) {
    console.log('error: ', error);
  } else {
    console.log('characteristics: ', characteristics);
    console.log(characteristics.length);
    if (characteristics.length != 2) {
      return;
    }
    for (let i = 0; i < 2; i++) {
      if (characteristics[i].uuid == 'a5f125c1-7cec-4334-9214-58cffb8706c0') {
        blueToothTXCharacteristic = characteristics[i];
        console.log('detected first characteristic');
      }
      if (characteristics[i].uuid == 'a5f125c2-7cec-4334-9214-58cffb8706c0') {
        blueToothRXCharacteristic = characteristics[i];
        console.log('detected second characteristic');
      }
    }

    blueTooth.startNotifications(blueToothRXCharacteristic, gotValue, 'string');
    isConnected = blueTooth.isConnected();
    connectButton.hide();
    showAllParam();
    sendData("#param");
    // Add a event handler when the device is disconnected
    blueTooth.onDisconnected(onDisconnected);
  }
}


// A function that will be called once got values
function gotValue(value) {
  console.log('value: ', value);
  let splitString = split(value, ',');
  newData = true;
  if (splitString[0] == 'stat') {//status string
    if (splitString[1] == 'co') {
      wifiConnected = true;
      falseWifiCredentials = false;
      showWifiParam();
    }
    ssidInput.value(splitString[2]);
    connectedSSID = splitString[2];
    ip = splitString[3];
    if (splitString[4] == 'on') {
      AlexaStatusSlider.value(1);
      alexaStatus = "on";
    } else {
      AlexaStatusSlider.value(0);
      alexaStatus = "off";
    }
    if (firstConnected) {
      sendData("#param");
      firstConnected = false;
    }
  } else if (splitString[0] == 'wifiFailed') {//pw string
    falseWifiCredentials = true;
    wifiConnected = false;
  } else if (splitString[0] == 'wifiNotConfigured') {//pw string
    wifiConnected = false;
  }
}

function onDisconnected() {
  console.log('Device got disconnected.');
  isConnected = false;
  firstConnected = true;
  connectButton.show();
  hideAllParam();
}

function sendData(data) {
  const inputValue = data;
  if (!("TextEncoder" in window)) {
    console.log("Sorry, this browser does not support TextEncoder...");
  }
  var enc = new TextEncoder(); // always utf-8
  blueToothTXCharacteristic.writeValue(enc.encode(inputValue));
}