Android app does not find bluetooth connection of STEVAL-FCU001V2
Hello, I bought original STEVAL-FCU001V2 board and STEVAL-DRONE02. When I tried to connect via Android app for the first time to the STEVAL-FCU001V2 board, I successfully connected. Later I forgot battery connected to the board and battery became useless. Then I bought new 1S lipo battery and run the board again but app does not find bluetooth connection anymore. I used the board with some custom softwares; ran motors, collected data from IMU sensor successfully, but I have no idea about bluetooth module. I sucessfully builded original STSW-FCU001 after fixing some simple errors and installed to the board but it still does not find connection. I have not enough knowledge to fix codes about bluetooth, I bought it to learn at all. Did anyone else face with same problem and solve it?