I connected my Orange Cube Here 3 to my raspberry pi using USB, which works well. But I tried to use UART.
Connecting the Raspberry pi to Telem 2. Connecting both TX, RX and Ground. Even the 5V+. When I power the external power on my raspberry it works. (Raspberry now is powering the Cube)
Now I remove the external power to my raspberry. Connect my raspberry to the same battery source that power the cube.
When I turn on it sound exactly the same with the buzz. But when I tried to connect to the flight controller using Mavproxy. it shows Link 1 Down. Anyone knows why?