Microbit Bluetooth UART service data reading problem

[nmitrak]

Hi @adabru, as i wrote in a previous post i managed to connect unity and then hololens 2 with a microbit and read its internal temperature sensor value by subscribing to the respective ServiceId and CharacteristicId. But now i have a second temperature sensor that i have connected to a microbit's pin and wrote a program for the microbit in order for the temperature value of the sensor (a simple number) to be transmitted though the Bluetooth Uart service which i enabled on the microbit.
Although i managed to send a set of characters from Unity to the microbit , through your BlewinrtDll project , by using the Demo's Write function , which uses BleApi.SendData, i cannot read any data coming from the microbit. It seems to me that when unity polls data from the CharacteristicId {6e400002-b5a3-f393-e0a9-e50e24dcca9e} of the Bluetooth UART Service nothing comes out. Subscribing to this service doesnt seem to detect value changes when using your demo(?)
The funny thing is that i can read the values coming from microbit through this bluetooth Uart service when using an android phone ,with a custom made application with appinventor and that the Microsoft 's Sample BluetoothLE app from Hololens 2 can subscribe to this CharacteristicId and seems to be detecting value changes but cannot recognize the data format.
I would appreciate any ideas . Again thank you very much.

[nmitrak]

After some research it seems that for that particular bluetooth uart service microbit sends raw binary data. Maybe unity polls for incoming data that are not in raw binary format

[adabru]

Hi nmitrak, binary format should be fine for BleWinrtDll. In the Microsoft sample, you can try setting a breakpoint or a log output at https://github.com/microsoft/Windows-universal-samples/blob/main/Samples/BluetoothLE/cs/Scenario2_Client.xaml.cs#L447