Serial Passthrough - ShikOfTheRa/scarab-osd GitHub Wiki

This is for iNAV/Betaflight users who wish to configure the OSD via USB connection into the flight controller There are two methods for using serial passthrough:

Using GUI to try to enter passthrough mode

• Plug in USB (FC UART you are connected to is displayed as the port)
• Plug in LIPO to power the OSD
• Go to MWOSD GUI, choose the FC port
• Tick the passthrough box
• Select the UART the OSD is connected to
• Set baudrate set to 115200 unless using alternative
• Click Connect

Manually set up

• Plug in USB (FC UART you are connected to is displayed as the port)
• Plug in LIPO to power the OSD
• Open iNav/Betaflight & connect
• In CLI enter "serialpassthrough 1 115200 rxtx" .Replace 115200 with alternative baud rate if necessary
• Click disconnect in iNav/Betaflight GUI
• Go to MWOSD GUI, choose the FC UART port you are connected to
• Ensure "passthrough" box is unticked
• Select the UART the OSD is connected to
• Set baudrate set to 115200 unless using alternative
• Click Connect

NOTE: Passthrough is dependent upon several items functioning correctly. It may not always work. Flashing via passthrough is not usually possible