Flysky AFHDS 2A, protocol as used i10, i6, iT4,

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15 Jan 2016 19:24 - 15 Jan 2016 19:25 #41792 by Fernandez
Flysky makes nice receivers cheaply and there are a lot of people using those tx....They are found relibale and to have good range reports.
The AFHDS2A protocol for A7105chip, has 14channels, telemetry, the receivers come with cppm, diversity antennas and telemetry bus named ibus, cheap sensors.

It has allready been reversersed enginerered by others so mayby goebish or our other hardcore Deviation programmers could implement it o deviation, would be appreciated.

The blog of this French tweaker give all info, so all credits to him!
basejunction.wordpress.com/2015/08/23/en...i6-14-channels-part1

Some info copied from part 2:
xA0

xE0

x05x58
x5Ax89
x36x77
x41x88
xD0xB2
x5Cx05 chan 1
x17x06 chan 2
xF1x03 chan 3
xD1x04 chan 4
xD0x07 chan 5
xD0x07 chan 6
xDCx05 chan 7
xDCx05 chan 8
xDCx05 chan 9
xDCx05 chan 10
xDCx05 chan 11
xDCx05 chan 12
xDCx05 chan 13
xDCx85 chan 14
x00

x0F
xXX
Last edit: 15 Jan 2016 19:25 by Fernandez.

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16 Jan 2016 11:43 #41819 by goebish
Pretty interesting blog posts, but there's not much about the protocol there, it's mostly about hacking stock firmware (patching the binary).

I could have a look at this protocol, but only if someone can provide SPI dumps or lend me a TX/RX pair (from France if possible, or that will cost an arm to ship it back ...).

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03 Mar 2016 06:46 - 03 Mar 2016 06:55 #44007 by stinkydiver73
Replied by stinkydiver73 on topic Flysky AFHDS 2A, protocol as used i10, i6, iT4,
Hi!
Here is the captured SPI data from a tx with the original fs-i6 firmware.
Channel numbers repeated after every 16 packet. After each packet sent, ready to receive the answer on txchannel-1, with same antenna, but only every 15th packet answered. Next packet tx/rx uses the other antenna. After every 16 packet, no antenna change, to use same channels on the other antenna next time.
The receiver(fs-ia6b) already running when the tx powered on. I made few comments in the spi capture text file. Its an A7106 chip, i compared the datasheets, only minor differences found, A7105 must be working.
Attachments:
Last edit: 03 Mar 2016 06:55 by stinkydiver73. Reason: typo

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05 Mar 2016 06:43 - 05 Mar 2016 14:04 #44133 by Alexandro
Replied by Alexandro on topic Flysky AFHDS 2A, protocol as used i10, i6, iT4,
If some one want a Bug Check i have the Equipment and Telemetry Sensors.
Tx are 8D and 7E with A7105 Chip

greetings Alex
Last edit: 05 Mar 2016 14:04 by Alexandro.

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14 Mar 2016 03:26 - 14 Mar 2016 03:27 #44536 by john
great . i used tx flysky i6 , range very far. and cheap
Last edit: 14 Mar 2016 03:27 by john.

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14 Mar 2016 03:52 #44538 by dc59

john wrote: great . i used tx flysky i6 , range very far. and cheap


I have seen youtube video of i6 , it can reach 1.7KM ? is it true ? :ohmy:

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22 Mar 2016 18:50 #44988 by Fernandez
Replied by Fernandez on topic Flysky AFHDS 2A, protocol as used i10, i6, iT4,
Anyone who could look at this protocol, on paper very promising protocol.

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12 Apr 2016 09:24 #46346 by dc59
Is there any news about this protocol?

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12 Apr 2016 11:08 #46350 by goebish
Last time I checked there was only some data stage dumps, not enough informations to reverse the protocol... We also need dumps of bind stage from a few transmitters to figure how it works.

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12 Apr 2016 13:51 #46361 by dc59

goebish wrote: Last time I checked there was only some data stage dumps, not enough informations to reverse the protocol... We also need dumps of bind stage from a few transmitters to figure how it works.


OK,I will try to get those data.
Thanks a lot. :cheer:

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15 Apr 2016 10:58 - 15 Apr 2016 10:59 #46553 by Alexandro
Replied by Alexandro on topic Flysky AFHDS 2A, protocol as used i10, i6, iT4,
@goebish

You are at EU (France ?)
Do you want the Hardware for making the Protocol ?
I have a TGY-i10 Box with RX and Telemetry Sensors. You can have it to log all the Data you want !
If you kill it then trash it , i want no money if it get broken by Solder, ........

If all then done you can send it back to me.
It is my Spare TX
greetings Alex
Last edit: 15 Apr 2016 10:59 by Alexandro.

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15 Apr 2016 11:00 #46554 by goebish
Yes, I'm in France :)

Thanks for your offer but I do not have the time to do it for now, maybe next month, I'll come back to you then :)

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15 Apr 2016 11:09 - 15 Apr 2016 11:09 #46556 by Alexandro
Replied by Alexandro on topic Flysky AFHDS 2A, protocol as used i10, i6, iT4,
pm me your Adress, i send it this week. No worry about the time, if it takes some month then it is ok.
I do not need it, it is collecting Dust :)
i pay the Post Ticket !

greetings Alex
Last edit: 15 Apr 2016 11:09 by Alexandro.

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15 Apr 2016 11:16 - 15 Apr 2016 11:32 #46559 by goebish
Ok, PM sent, but don't hold your breath ;)

dc59, I'm still interested if you can have some dumps as I'll probably need some from a few different transmitters. Also, an important capture to have is bind sequence.

Thanks stinkydiver73 for posting an annotated dump already, that should help to understand A7105 ID Data, channel hopping sequence etc ... but no bind sequence here to my understanding.
Last edit: 15 Apr 2016 11:32 by goebish.

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15 Apr 2016 12:46 #46562 by stinkydiver73
Replied by stinkydiver73 on topic Flysky AFHDS 2A, protocol as used i10, i6, iT4,
Later i will make capture for the binding sequence too, and with different failsafe settings.

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15 Apr 2016 12:48 - 15 Apr 2016 12:59 #46563 by goebish
Thanks :)

No hurry, as I said I probably won't have the time to tackle that until mid may.
Last edit: 15 Apr 2016 12:59 by goebish.

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15 Apr 2016 13:37 #46564 by dc59
@Goebish,
No problem,I'll do it. :cheer:

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15 Apr 2016 13:56 #46566 by Alexandro
Replied by Alexandro on topic Flysky AFHDS 2A, protocol as used i10, i6, iT4,
@goebish

what service is the best for You to save the waiting at Post Office ?
the Box is 27 ,14 ,25 cm

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15 Apr 2016 14:02 #46567 by goebish
That looks fine:
www.colissimo.fr/particuliers/envoyer_un...e_sans_signature.jsp

... though in the same paragraph they say

"Le colis est livré sans signature en boîte aux lettres du destinataire. En cas d'absence lors de la livraison, un avis de passage est laissé dans la boîte aux lettres du destinataire."
Lol !

Don't worry anyway, I live 100 meters away from the post office ;)

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15 Apr 2016 22:51 #46587 by dc59
Need some help for capture SPI.
scs -> enable
sck -> clock
sdio -> mosi
gnd -> gnd
Can't find a pin for miso ??? or just leave it alone ? :unsure:

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