Miscellaneous notes

These are random AP-related notes that wouldn’t fit anywhere else:

DJI FPV configuration

If you got some DJI goggles, here’s the relevant configuration you need to make:

  1. Set OSD_TYPE=3.
  2. Set SERIALn_PROTOCOL=33 SERIALn_BAUD=115 SERIALn_OPTIONS=0 (DJI FPV).
  3. Create a text file called naco.txt on the SD card of the Air Unit with the text 1 in it to unlock full power.
  4. Create a text file called naco_pwr.txt on the SD card of the goggles with the text pwr_2 in it to unlock more full power.
  5. Set “Custom OSD” to “on” in the goggles menu.
  6. Arrange your OSD elements how you like them.

That’s it!

DMA on the Matek F405-Wing

If you want to get DMA on UART3 of the Matek F405-Wing FC (or, more relatedly, the Racerstar F405, because UART1 is Bluetooth there), you can open libraries/AP_HAL_ChibiOS/hwdef/MatekF405-Wing/hwdef.dat and comment out line 92ish, where PA15 is defined.

That will enable DMA on UART3, at the expense of disabling the LED pad.


Last updated on October 22, 2021. For any questions/feedback, email me at hi@stavros.io.