I am using the library RxAndroidBle in order to scan devices and then connect to one specific device and read 4 GATT characteristics.
I can read one characteristic (Battery Level) ith this code :
scanSubscription = rxBleClient.scanBleDevices(
new ScanSettings.Builder()
.build()
)
.observeOn(AndroidSchedulers.mainThread())
.doOnNext(
scanResult -> {
if(scanResult.getBleDevice().getName() != null){
if(scanResult.getBleDevice().getName().equals("NODE 1")){
Log.e("BLE SCAN", "SUCCESS");
Log.e("BLE SCAN", scanResult.getBleDevice().getName());
Log.e("BLE SCAN", scanResult.getBleDevice().getMacAddress());
scanSubscription.unsubscribe();
RxBleDevice device = scanResult.getBleDevice();
subscription = device.establishConnection(false) // <-- autoConnect flag
.flatMap(rxBleConnection -> rxBleConnection.readCharacteristic(UUID.fromString("00002a19-0000-1000-8000-00805f9b34fb")))
.subscribe(
characteristicValue -> {
Log.e("Characteristic", characteristicValue[0]+"");
},
throwable -> {
Log.e("Error", throwable.getMessage());
}
);
}
}
}
)
.subscribe();
I can read two by using :
.flatMap(rxBleConnection -> Observable.combineLatest( // use the same connection and combine latest emissions
rxBleConnection.readCharacteristic(aUUID),
rxBleConnection.readCharacteristic(bUUID),
Pair::new
))
But I don't understand how to do that with 4 characteristics for example.
Thank you