- You Reply:
```html
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>bluetooth test</title></head><body> <button id="scan">scan</button> <button id="disconnect">disconnect</button> <button id="reconnect">reconnect</button> <button id="send">send</button> <script> var bluetoothDevice = null; var Bcharacteristic = null; document.querySelector('#scan').addEventListener("click", () => { navigator.bluetooth.requestDevice({ optionalServices: ["0000dfb0-0000-1000-8000-00805f9b34fb"], acceptAllDevices: true, }) .then(device => { // Human-readable name of the device. console.log('Connecting to GATT Server...'); bluetoothDevice = device; // Attempts to connect to remote GATT Server. return bluetoothDevice.gatt.connect(); }) .then(server => { // Getting Service… console.log('Getting Service...'); return server.getPrimaryService('0000dfb0-0000-1000-8000-00805f9b34fb'); }) .then(service => { // Getting Characteristic… console.log('Getting Characteristic...'); return service.getCharacteristic('0000dfb2-0000-1000-8000-00805f9b34fb'); }) .then(characteristic => { return characteristic.startNotifications(); }) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', handleCharacteristicValueChanged); console.log('Notifications have been started.'); }) .catch(error => { console.error(error); }); })```
- You Reply:
did you solve this problem?
I ran into the same problem while working on a project.
I've been looking for a way for a week now, but I couldn't find one.
There was no reference anywhere that said it was solved.
did you solve it? Can you tell me how you solved it?
Below is part of the code I wrote. Here, the error occurred at line 39.