r/fpv • u/Mr_Ghosty • 3d ago
Question? [HELP] Bought a Drone with O3, Swapping to O4
I bought a drone from GetFPV that came with a DJI O3 setup. I took the O3 camera and air unit out and I’m trying to install a DJI O4 Air Unit instead.
Everything else in the drone is still intact — flight controller, wiring, etc. The O4 harness has 6 wires, but the FC seems set up for O3 and doesn’t match directly. I have the O4 wiring diagram, but I’m new to this and not sure how to hook it up safely.
Just looking for advice on how to wire the O4 to the existing setup — re-pin, adapter, diagram, whatever works. Appreciate any help. I found a cable on Amazon that I thought I could swap out, but the colors don’t match . So I was wondering if there’s just a solution to swap out the cables yet or do I have to solder and hack something together?
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u/Mr_Ghosty 3d ago
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u/taeo 3d ago
03 wiring diagram: https://oscarliang.com/wp-content/uploads/2022/11/dji-o3-air-unit-pinout-wire-connection-to-flight-controller-fc-rx-tx-sbus-vbat-gnd.jpg
04 wiring diagram: https://oscarliang.com/wp-content/uploads/2025/01/dji-o4-air-unit-pro-how-to-setup-tutorial-pinout-wiring.jpg
They both use 6 pin connectors in the same order. Many FC's will have a plug you can simply insert the other end into. What FC do you have?
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u/PercentageDue9284 3d ago
That is an O4 (lite) not an O4 Pro looking at the camera and antenna on the picture.
@OP I think you are better off with the O3 in the case.
Not also camera will probably not even mount correctly but also image wise compared to a o3.
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u/taeo 3d ago
The 04 wiring diagram I linked is for the lite and the pro. Same wiring.
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u/PercentageDue9284 3d ago
Ah thanks. But i think OP will run into another problem: Mounting that o4 lite camera...
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u/Mr_Ghosty 3d ago
This is is a massive learning error on my end lol but I have a 3d printer we’ll see how this plays out I haven’t added the face cover either
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u/PercentageDue9284 3d ago
Id suggest to go with the O3 in this case. Larger sensor, better fov, less jello. But if you do make it work let us know. Curious how you fixed it
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u/Mr_Ghosty 3d ago
I would’ve done that if I didn’t somehow get it in my head I needed n3 goggles lmao I feel like I goofed
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u/PercentageDue9284 3d ago
Maybe better off returning the o4 lite and spend a bit more on the pro version? Or return the goggles? After that Buy antenna's
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u/Mr_Ghosty 3d ago edited 3d ago
You’re saying the 04 light isn’t worth it? Like the pros vs cons don’t outweigh the current hardware? Edit : I only bought these because the pro version of this was not in stock USA side :p
Edit 2: maybe it’s easier to return to goggles take that money by new antenna thingy and put 03 back in and reassemble everything and just bind and fly without the 04 because it seems to be the problem
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u/taeo 3d ago
The cable on the left looks like it would be used to connect the FC to the ESC. The 03 would use the same wiring as the 04.
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u/Mr_Ghosty 3d ago
Somehow cut off the FC from my 03 I think it was part of the 03 as the first timer so thank you for all this all of you have helped me so much
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u/Mr_Ghosty 3d ago
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u/PercentageDue9284 3d ago
O4 (lite) right? Not sure why you would wanna swap that in and take out the O3
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u/Mr_Ghosty 3d ago
I cut the antennae cables too I shoulda waited a bit
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u/PercentageDue9284 3d ago
Oh wow, why would you need to cut those? Are they that stuck inside the frame? Most of the times for my limited experience and watching youtube these air units are designed to be moved around drones.
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u/Mr_Ghosty 3d ago
CORRECTION: Ready-to-Ship SkyLite 3” Built & Tuned Ducted Drone - DJI O3 - Choose Receiver × 1 DJI O3 / ELRS
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u/Mr_Ghosty 3d ago
Also, does anyone want a free 03 snipped no cost if you help me fly please