I am working on a Project, and I am new to BLE, I have got problem with writing value to BLE characteristic (run command on BLE device).
The characteristic take these values:
0x04 0x01 – Lock mode is on
0x04 0x02 – Lock mode is off
My method to read, notify and write from/to characteristic:
async readWriteNotifyCharacteristics(serviceUuid, characteristicUuid, access, command, handel) {
try {
const service = await this.server?.getPrimaryService(serviceUuid);
const characteristic = await service?.getCharacteristic(characteristicUuid);
switch(access) {
case 'R':
return characteristic.readValue()
case 'N':
return characteristic.startNotifications()
.then(() => {
characteristic.addEventListener('characteristicvaluechanged', handel);
});
case 'W':
characteristic.writeValue(command);
break;
default:
console.log('could not conenct');
}
}catch (error) {
console.log('error', error);
}
},
I try to write to characteristic with :
async readWriteNotifyCharacteristics() {
const buffer = new Uint16Array([0x06 , 0x02 ])
await this.cacheCharacteristics(
'f1196f20-qea4-00e6-bdh89-65790865c9a98',
'f1196f22-qea4-00e6-bdh89-65790865c9a98',
'W',
buffer
);
const command = await this.cacheCharacteristics(
'f1196f20-qea4-00e6-bdh89-65790865c9a98',
'f1196f22-qea4-00e6-bdh89-65790865c9a98',
'R'
);
},
Everything works fine connection, read from characteristic but nothing happen on the device when I try to write (command) on it. Any idea what I'm doing wrong? Thanks in advance:)
