I ve got a px4 2.4.8 fc . I am using it with qground controller. I installed px4fmu-v3 firmware in it.
When i want to arm it not arms. Qgroundcontroller says "PREFLIGHT FAIL: Avionics power low: 3.45 volt".
I've not mounted a external power module,
I don't want to use power module but i can't close power checks in qgroundcontroller or preflight checks.
I need to close preflight checks or battery checks.
Need your helps.