ble-tutorial

[gary]

Hello, I am working on ble characteristics tutorial. (F00D, BEEF example) I flashed the program and tried to scan my nrf52 DK on my Android phone. Some parts of my Android source is like this;

public final static UUID UUID_SERVICE = UUID.fromString("0000F00D-1212-EFDE-1523-785FEF13D123");

(...)

mBluetoothAdapter.startLeScan(new UUID[]{RFduinoService.UUID_SERVICE}, mLeScanCallback);

However, my phone can't find the device.

I think there's no problem in discovering service with that UUID.

What is the problem, then? Otherwise, is the UUID wrong?

[Sigurd]

On Android 4.3 and 4.4.x you have two methods to start BLE scanning:

• BluetoothAdapter#startLeScan(LeScanCallback)
• BluetoothAdapter#startLeScan(UUID[], LeScanCallback)

The method with UUID[] can only be used with 16-bit UUIDS. In the characteristics tutorial a 128-bit custom UUID is used, so the method with UUID[] will not work.

I would also highly recommend you to use our Android BLE Scanner Compat library