JJRC H20 Hex Quad

The JJRC H20 is a micro hexcopter featuring Headless mode, RTH and automated flips. The Yaw rate in High rate is amazing! I have tried all the existing protocols in Hexfet's test build, but none of them bound (fixed ID of None and 999).



I opened up the TX and captured SPI data and posted them to my Google drive.
H20 SPI Logicdata

Please let me know if there is anything else I can provide.

Took a look at the PowerOn capture, but something is wrong with the enable signal. Either it's not on the CSN line or the sample rate is too slow. The analyzer can't distinguish packet boundaries.

From what's there it looks very similar to the CX10 protocol, but the capture doesn't include a bind sequence.

I'll hook up again and get another capture. I found that this board seems to be really weird at power-on, because as you see there and in the "H20 Bind Aileron Max-Min.logicdata" the ENable line seems to stay low during the first few communications. Maybe I need to find a better ground? The data after about 100ms seems like a normal capture.

Thanks for taking this on.

Update: I was using the wrong enable line... So rerunning the captures now.

I have posted the updated captures. They look right this time. Let me know if you see anything wrong.

The first Power On No Bind is just turning on the TX without the Hex on. The Power on Bind is with the H20 on. To bind you need to power on the H20, then power on the TX then raise/lower the throttle. So after the bind I included the throttle max-min cycle in the same capture.

drive.google.com/folderview?id=0B69zZpwk...xT04wanM&usp=sharing

Wish I had time to work on it but that won't happen for a while.

It's similar to CX10, somewhat. Different bind address, rf channel, packet length, packet format...but the data phase rf channel algorithm looks similar and chip initialization is the same

Of course I appreciate the look and I hope you have time soon. Let me know if there is anything else I can do. Thank you -- you do great work!

Nice Goebish
Perhaps I need a new toy Quadcopter?

I have ordered a H8 mini "3D" a week ago, as such I can check if its compatible once you have implemented the JJRC H20 protocol.

goebish wrote: I might have a go at implementing it sometime next week, looks like the newer CX-10 H8 mini "3D" is using the same protocol (well, that's what I've been told )

It is.. I received my H8 Mini 3D yesterday, and it uses the exact same TX as the H20. You can fly the H8 3D with the H20 TX, tested that. And without any modding, it has almost the same poor range as the H20, resulting in multiply fly-aways, and having to retrieve the quad by walking over to it.

Dose this one ues same protocol as H20?

www.mediafire.com/download/6m4bcij5jz8za...82G-PowerOn-Bind.zip

It's from WLToys Q282G hexa FPV .
Thanks!

goebish wrote: Not the same protocol.

Thanks for confirmation !!

Hi Goebish,
Is my capture data of Q282G correct ?

goebish wrote: Yes, seems to be valid SPI, with xn297 init and all.

Thanks a lot !!

@dc59 Yoy got already this model ?

SeByDocKy wrote: @dc59 Yoy got already this model ?

Yes, I have got WLToys Q282G.