Hang up at await BleManager.retrieveServices()

Version

react-native-ble-manager v ^6.4.0 react-native v 0.55.4 iOS/Android v 10.3/8.0

Actual behaviour

Hang up at ### await BleManager.retrieveServices() after connected successful.

async function connectAndPrepare(peripheral, data_wr) 
{
  // Before startNotification you need to call retrieveServices
  await BleManager.retrieveServices(peripheral.id).then((peripheralInfo) => {
        console.log("retrieveServices",peripheralInfo);
        }); 
  // To enable BleManagerDidUpdateValueForCharacteristic listener
  await BleManager.startNotification(peripheral.id, service, characteristic).then(() => {
            console.log('Started notification on ' + peripheral.id);
        });    
  await BleManager.write(peripheral.id, service, characteristic, data_wr).then(() => {
                console.log('Write to peripheral');
        });
}

Stop without any error log… Any idea?

[marcosinigaglia]

I don’t know if you can use ‘await’ and ‘then’ in an async function.

[pkyeck]

rewrite that as

async function connectAndPrepare(peripheral, data_wr) 
{
  try {
    // Before startNotification you need to call retrieveServices
    const peripheralInfo = await BleManager.retrieveServices(peripheral.id);
    console.log("retrieveServices",peripheralInfo);
    
    // To enable BleManagerDidUpdateValueForCharacteristic listener
    await BleManager.startNotification(peripheral.id, service, characteristic);
    console.log('Started notification on ' + peripheral.id);

    await BleManager.write(peripheral.id, service, characteristic, data_wr);
    console.log('Write to peripheral');
  } catch(err) {
    console.error(err);
  }
}

so then at least you get errors when something goes wrong