The DJI O3 Air Unit is only for two days on the market, and it has already been hacked. If you are in the FCC region, you will get out of the box the best possible range. Instead, the CE version has a much shorter transmission distance. According to the manufacturer’s technical specs, in FCC mode range is 10KM, and in CE mode is only 2KM. Of course, these distances can be obtained only in optimal conditions, flat ground, no obstacles, and low RF noise.
After unlocking FCC mode, the VTX power increased from a few mW to over 1W. Remember that 25mW is the maximum unlicensed power you can transmit in many countries worldwide, particularly in Europe (CE). That means performing this range hack without owning the required permits to transmit stronger signals would be illegal.
O3 AU Transmission Power (EIRP) and Range:
- FCC: < 33 dBm | 10KM
- CE: < 14 dBm | 2KM
- SRRC: < 30 dBm | 6KM
DJI O3 Air Unit FCC unlock tutorial
Disclaimer: All data and information provided in this article are for informational purposes only. FirstQuadcopter will not be responsible for any action performed by any reader!
Performing the FCC unlock on the O3 Air Unit is identical to the DJI AVATA range hack. Practically, you just need to create an empty plain text file with the name ‘ham_cfg_support’, save it with no extension, and copy it to the root of the micro SD card on the FPV Goggles 2\V2. After you restart the goggles and power them ON, the AU O3 FCC mode is enabled, and you can enjoy the best range regardless of your location. The Ham file can be downloaded from here.
hello,
can you please inform me, I bought a dji air unit 03 to replace the previous model, I put the ham file in the glasses which have indeed switched to several channels so the goggle 2 glasses are in fcc, on the other hand I have a very low range, can you tell me if I have to put a flight card on my air unit 03 which I mounted on a flying wing and not a drone? I just powered my air unit03, the image is perfect but After 500m it turns red, I don’t know what to do anymore, thank you for your help, on the old model everything worked without a flight card. What should I do?
thank you!
CDT
I have only one channel at 40mhz, this means that I’m still on CE mode??
In FCC mode, you should have total of 8CH
cap on 40mhz u need to have 3
Thanks!
Has there been any documented range tests of the O3 air unit? DJI claims 10 KM, but I’m yet to see if it’s true.
Vista claimed to have 4km however, I never got over 2.5km.
I think the 10KM is very, very optimistic and can be obtained only in a laboratory environment :)
I went with my Goggles2 / O3 already around 15km but on a flying wing. They have way less RF noise than a quadcopter. I saw already videos of 24km flights with the O3, but not with stock antennas.
Any hard obstacles between drone and fpv goggles will cut range drastically!
I installed the latest firmware. Is it still possible to use the FCC hack (ham_cfg_support)?
Thanks
Frederick
Thanks dude!
Do you need to take apart the DJI O3 Air Unit for this range hack?
No, you don’t. The O3 AU range hack is non ‘invazive’
No, you do not need to disassemble the air unit to place a text file on the SD card of your goggles.
Thanks for sharing! I’m in Germany and everything from DJI has a horrible range. The CE to FCC conversion is pur salvation:)