BLE component returns - "Characteristic read failed error"


I have been trying to create an app that receives byte array from a RaspberryPi controller. I know that Thunkable only allows READ property for a characteristic and I have set my characteristic to that. However, it always throws an error saying Characteristic < Characteristic ID > read failed for device and Service . I am not sure what am I doing wrong. Can someone share the example of a working code on the microcontroller side so I could check my code and make changes accordingly?

The characteristic ID might be wrong, or the device or your phone doesn’t have Bluetooth enabled in it.