If you want to use the VTX PIT mode function please type the following in the CLI command line:
resource pinio 1 A15 (Hit Enter)
Set pinio_box = 39 (Hit Enter)
Assign a switch to the VTX PIT option in Betaflight MODES tab.If you decide mounting the FC upside with USB to the left side of the drone to benefit from the clean flat back of the board
remember to change the board orientation in the Betaflight configuration page like in the below image.Check the below Race footage from MewoFPV Cory Ibanez 1st place winner at the Nytfury VS Dolma Callout Race using the PyroDrone F4 OSD Flight Controller.
If you have V2.2 or V2.3 Boards please adjust the voltage scale in the Betaflight Power and Battery page as follows: