I have an omnibus f4 v5. I would like to hook up 3 cameras with a camera switch. Leds. A servoless payload module (5v signal needed). A 4in1 esc, vtx with smart audio, and an rx4 rx. Also a gps unit. I think I don't have enough uarts but I am confused by 2 pads labeled pwm5 and pwm6 are these...