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  7. Help to find the protocol for JJRC H31 please!

Help to find the protocol for JJRC H31 please!

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22 Apr 2019 12:48 #74085 by tianma780
Help to find the protocol for JJRC H31 please! was created by tianma780
Help!Help!Help! Help to find the protocol for JJRC H31,Goebish and HappyHarry,please come in!

The JJRC H31 is inexpensive, robust, good flight times, simple and straightforward basic quad to just tool around with. So please! please! please!
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22 Apr 2019 12:52 #74086 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
Hi,

First post some pictures of the electronics (transmitter & quad) so we can tell which transceiver it's using.
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22 Apr 2019 13:29 #74087 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
If you can't attach pictures to your post just upload them to imgur.com/upload for example then post the links.

Please use the forum, not github ;)
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22 Apr 2019 13:38 #74088 by tianma780
Replied by tianma780 on topic Help to find the protocol for JJRC H31 please!
Ok,thanks!
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22 Apr 2019 15:00 - 22 Apr 2019 19:54 #74089 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
According to this topic it's using a LT8910, we can't make it work with deviation.
www.deviationtx.com/forum/protocol-devel...rotocol-for-jjrc-h31
(or maybe there's a very small chance, but proper logic analyzer dumps are required first)
Last edit: 22 Apr 2019 19:54 by goebish.
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23 Apr 2019 01:06 #74095 by tianma780
Replied by tianma780 on topic Help to find the protocol for JJRC H31 please!
Can I send a h31 transmitter to you for capture?
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23 Apr 2019 01:08 #74096 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
Problem is that it's using a LT8910 transceiver, depending of the mode it's using there's no guaranty I'll be able to make it work with Deviation.

If you're fine with that I can give you my address in PM.
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23 Apr 2019 01:10 #74097 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
Also, I've no idea if only the transmitter is enough, the quad might be required as well if the bind stage is bi-directional.
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23 Apr 2019 01:11 - 23 Apr 2019 01:14 #74098 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
Can you get a logic analyzer to make a first dump so I can check the LT8910 parameters ?
I wouldn't like that you send one to me for nothing ...
Last edit: 23 Apr 2019 01:14 by goebish.
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23 Apr 2019 01:23 #74099 by tianma780
Replied by tianma780 on topic Help to find the protocol for JJRC H31 please!
Can you tell me what is the logic analyzer?how to get it and how to make a first dump?I have the telephone No. of JJRC H31 technician so I ask him about the LT8910 chip.
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23 Apr 2019 01:25 #74100 by tianma780
Replied by tianma780 on topic Help to find the protocol for JJRC H31 please!
My email:alanchan2772@yahoo.com.hk
I don't know how to send the picture to you!
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23 Apr 2019 01:44 - 23 Apr 2019 02:06 #74101 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
SPI dump guide:
www.deviationtx.com/forum/protocol-devel...95-spi-capture-guide

I know how the LT8910 works, but depending of the mode the protocol is using (baudrate, line coding, FEC ...) it might be emulated with the nrf24 or cc2500 ... or not.
Last edit: 23 Apr 2019 02:06 by goebish.
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23 Apr 2019 04:55 #74103 by tianma780
Replied by tianma780 on topic Help to find the protocol for JJRC H31 please!
thanks goebish .I have a learning
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23 Apr 2019 05:03 #74104 by tianma780
Replied by tianma780 on topic Help to find the protocol for JJRC H31 please!
OK,I can send the send the h31 transmitter and the quad to you for capture! My english is limited and this work is hard to me!
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23 Apr 2019 10:05 - 23 Apr 2019 10:05 #74109 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
Check your private messages, keep in mind that I'll do my best but there's no guaranty of result.
Last edit: 23 Apr 2019 10:05 by goebish.
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25 Apr 2019 09:45 #74129 by tianma780
Replied by tianma780 on topic Help to find the protocol for JJRC H31 please!
Goebish，I have sent the h31 transmitter and RX board to you for capture!Thanks your hard work！
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25 Apr 2019 09:47 #74130 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
Ok, I'll let you know when I receive it, thanks :)
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30 Apr 2019 10:11 #74173 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
Got it in the mail today, I'll try having a first look next week-end.

I see there are also other parts in the box, most seems to be E010 (?) but what's the other 2 channels tx/rx ? is it for GD00x protocol ?
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01 May 2019 07:38 #74178 by tianma780
Replied by tianma780 on topic Help to find the protocol for JJRC H31 please!
hah so fast.

the parts is JJRC H36，and the mottor all for you play.

the 2 channels TX/RX is for your capture and find the protocol,please,thank you.

can you tell me your email,thank you please！
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01 May 2019 10:09 #74179 by goebish
Replied by goebish on topic Help to find the protocol for JJRC H31 please!
no email, just use the forum ;)
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