protocol for JJRC H31?

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07 Jul 2017 10:25 #63331 by Schamane

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07 Jul 2017 10:33 #63332 by goebish
Replied by goebish on topic protocol for JJRC H31?
That still doesn't look like LT8910 SPI data, I'm not sure what's wrong :(

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08 Jul 2017 08:02 #63353 by Schamane
Replied by Schamane on topic protocol for JJRC H31?
Ok, too bad.
How does your decoder work? Is it a script for logic? Is it free software?

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08 Jul 2017 08:41 #63354 by goebish
Replied by goebish on topic protocol for JJRC H31?

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08 Jul 2017 09:18 #63356 by Schamane
Replied by Schamane on topic protocol for JJRC H31?
Great, thank you!

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31 Aug 2017 18:01 #64079 by joeblack
Replied by joeblack on topic protocol for JJRC H31?
Any progress in hacking JJRC H31 protokoll?

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01 Oct 2017 17:21 - 01 Oct 2017 17:25 #64767 by Elric
Replied by Elric on topic protocol for JJRC H31?
The JJRC H97 and the Goolrc X5C have the same remote control (KY-M7-H31T) with chip NST LT8910SSC 1610.

I will receive a logic analyzer in the next few days.

Can you help me to wiring the LT8910 with the logic analyzer. I did not understand everything by watching the video.
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Last edit: 01 Oct 2017 17:25 by Elric. Reason: picture

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01 Oct 2017 18:41 #64769 by joeblack
Replied by joeblack on topic protocol for JJRC H31?
did you read the threads on from 62909 , there you should find the right wiring.
greetings joerg

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08 Oct 2017 13:54 #64916 by zippiz
Replied by zippiz on topic protocol for JJRC H31?
Any luck with this protocol?

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17 Oct 2017 20:26 #65093 by Elric
Replied by Elric on topic protocol for JJRC H31?
Capture :

OFF => ON
Binding
Throttle

1drv.ms/u/s!AuNBpmXL1y0Rg8p8uC7PQ9Uo-ud_Vg

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17 Oct 2017 20:32 #65094 by goebish
Replied by goebish on topic protocol for JJRC H31?
Same as witth Schamane's captures, that doesn't look like LT8910 data ... there are other data on the SPI bus, so I'm not sure SPI_SS is connected to the right place.
www.deviationtx.com/forum/protocol-devel...c-h31?start=20#62902

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17 Oct 2017 20:45 #65095 by Elric
Replied by Elric on topic protocol for JJRC H31?
which head should have the SPI_SS? do you have an example?

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17 Oct 2017 20:57 #65096 by goebish
Replied by goebish on topic protocol for JJRC H31?
No, but just make sure SPI_SS from the LT8910 is connected to the analyzer. If you're sure that's the case then I don't know. The LT8910 is not emulated by deviation anyway, except if the protocol uses it in a specific way.

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17 Oct 2017 21:18 #65097 by Elric
Replied by Elric on topic protocol for JJRC H31?
On LT8910, PIN 13 (SPI_SS and PIN 14 (PKT_flag) are connected together.

it is a problem ? or it's normal

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17 Oct 2017 21:26 #65098 by goebish
Replied by goebish on topic protocol for JJRC H31?
No idea, but if your transmitter is working fine that's Ok.

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17 Oct 2017 22:47 - 17 Oct 2017 23:21 #65100 by Elric
Replied by Elric on topic protocol for JJRC H31?
Oooop ! fail
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Last edit: 17 Oct 2017 23:21 by Elric.

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17 Oct 2017 22:49 #65101 by goebish
Replied by goebish on topic protocol for JJRC H31?
No.

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13 Sep 2018 12:55 #70877 by thecric
Replied by thecric on topic protocol for JJRC H31?
Do these final messages mean there will be never a way to get the JJRC H31 protocol on Deviation ?

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13 Sep 2018 13:25 #70880 by StevePropHead
Replied by StevePropHead on topic protocol for JJRC H31?
Hey everyone, I was getting anxious to fly my H31 with my Devo10, and I started looking around for other quads in a similar vein as the H31...inexpensive, robust, good flight times, simple and straightforward basic quad to just tool around with. I found these two options that bind with Devo transmitters (both with the NRF module) and since then I've forgotten all about the H31.

1. NEAREST MATCH: JJR/C H10 $25 on eBay. It's about the same price as the H31, about the same size, but works with our Devos (Bayang protocol). From what I've seen people like the way they fly, and JJR/C has been a decent toy grade RC company. There are more expensive versions that also have a camera and whatever, but it's not a great camera anyway, and if you're just looking for a simple basic quad like the H31, the H10 fills that need just right. The only thing miss is that the H31 is waterproof and the H10 is not. I don't imagine that's the biggest concern for most people, but be aware of that difference. Here it is for $25 currently on eBay:
www.ebay.com/itm/JJRC-H10-2-4G-4CH-6-Axi...7:g:EWIAAOSwEzxYS3ay

2. SECOND BEST: WL Toys V686 $40-$45 on eBay. Again, it's about the same size as the H31, but more money. This only comes with a camera (in several versions...V686K, V686G, maybe others), and it sounds good on paper because the camera not only records to an SD card (which is also included!), but that same video is transmitted over 5.8 GHz as an FPV feed you can pick up with your own goggles or with the LCD monitor (which is ALSO included!). Sounds too good to be true, because it is too good to be true. It all works, but the frame rate on the recording is like 15 fps (which I can't stand) and there is massive latency on the FPV signal, so it's virtually unflyable by FPV. So if you throw out the FPV part, and you only assign a small value to the built in video recording part, then the V686 is a distant 2nd best option to the H10...but I just thought I'd mention it anyway because it does fly really, really well, and it does bind to our Devos (CX10 protocol). Here it is on eBay:
www.ebay.com/sch/2562/i.html?_from=R40&_nkw=v686&rt=nc&_udlo=35

If I knew before I bought an H31 what I know now, I never would have bought one. And if I knew before I bought my V686 what I know now, although I do like the way it flies, I would have instead bought an H10 for $25 and been happy as a clam.

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14 Sep 2018 06:12 #70895 by thecric
Replied by thecric on topic protocol for JJRC H31?
to StevePropHead: interesting thoughts ;-)

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