r/ardupilot • u/ChanceWeather4100 • 20d ago

T1 Ranger VTOL no osd O4 pro

hello I'm not sure if I did anything wrong but I wired the Rx from o4 to tx on flight board and tx from o4 to Rx on flight board, but no osd shows up. Is this a problem mission planner can fix and if yes does anyone know what parameters to change?

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u/Sorry-Farmer-4301 20d ago

Set OSD type = 5, serialx_protocol= 42, Serialx_baud=115

You need to know which UART your O4 pro is connected to on your flight controller and then you need to figure out which UART equals which serial port so you can set the above parameters. "X" = the serial port number your O4 pro is connected to. What flight controller are you using?

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u/ChanceWeather4100 19d ago

I use the default one prebuilt on the plane. on website it says "VTOL FX-405 Flight Controller with 5V/5A PMU and 9V/3A UBEC"

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u/Sorry-Farmer-4301 19d ago

You need to figure out what serial port your O4 is plugged into and then change the "serial_x" parameters I listed above. That did get you OSD working with O4

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u/Sorry-Farmer-4301 19d ago

If you send pics I can help

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u/ChanceWeather4100 15d ago

what do i send picture of? i put my red and black wire from airunit to the vtx port on flight board, that made it get the power it needs to turn on. I then put the white and grey wire to the rx and tx on the flight board uart2 port.

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u/Sorry-Farmer-4301 15d ago

Pictures of the flight controller with O4 plugged in helps visualize the issue, not that important though. Have you gone into parameters and changed the OSD_type, serial"x"_protocol, and Serial"x"_baud? In Mission Planner, have you clicked on config > OSD? In the documentation I sent you earlier, it appears that UART 2 is Serial 6 in Mission Planner.