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

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

---

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.

If some one want a Bug Check i have the Equipment and Telemetry Sensors.
Tx are 8D and 7E with A7105 Chip

greetings Alex

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

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 ?

Anyone who could look at this protocol, on paper very promising protocol.

Is there any news about this protocol?

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.

@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

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

Later i will make capture for the binding sequence too, and with different failsafe settings.

@Goebish,
No problem,I'll do it.

@goebish

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

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 ?