Furibee F36 protocol attempt

p1p3rn0 wrote:

wasp09 wrote: I brought an F36 but have been flying it with another FC that supports silverware and using a protocol supported by deviationtx, Get one of those for around $10 instead of chasing after mission impossible. F36 is good mainly because of it has bigger motors. I don't see why we have to stick with its unknown protocol.

Thank's! Now me too I have one of those for around $10 and I'm very happy
The only thing I'm in trouble is changing settings ..for example acro mode (left-left-down): many times it doesn't react.
Did you know if I have to change something in my jumper? Seems stick values don't reach max values or something similar.

It's something to do with the scaling of the stick, you may have to set it to over 100% to recognize gesture properly. I use a switch on my devo 10 for acro mode instead. I can flip between 2 modes literally on the fly.

wasp09 wrote:

p1p3rn0 wrote:

wasp09 wrote: I brought an F36 but have been flying it with another FC that supports silverware and using a protocol supported by deviationtx, Get one of those for around $10 instead of chasing after mission impossible. F36 is good mainly because of it has bigger motors. I don't see why we have to stick with its unknown protocol.

Thank's! Now me too I have one of those for around $10 and I'm very happy
The only thing I'm in trouble is changing settings ..for example acro mode (left-left-down): many times it doesn't react.
Did you know if I have to change something in my jumper? Seems stick values don't reach max values or something similar.

It's something to do with the scaling of the stick, you may have to set it to over 100% to recognize gesture properly. I use a switch on my devo 10 for acro mode instead. I can flip between 2 modes literally on the fly.

You mean I can configure a switch on my jumper to perform 3 commands? (left-left-down) I'm trying in mixer - complex but no success for now.

sirdomsen.diskstation.me/dokuwiki/doku.p...=basic_devo_multipro - acro switch set up

To compete the gesture it needs to have high rates as there is a specific time for the gestures to register on the FC. What rates are you using?

p1p3rn0 wrote:

wasp09 wrote:

p1p3rn0 wrote:

wasp09 wrote: I brought an F36 but have been flying it with another FC that supports silverware and using a protocol supported by deviationtx, Get one of those for around $10 instead of chasing after mission impossible. F36 is good mainly because of it has bigger motors. I don't see why we have to stick with its unknown protocol.

Thank's! Now me too I have one of those for around $10 and I'm very happy
The only thing I'm in trouble is changing settings ..for example acro mode (left-left-down): many times it doesn't react.
Did you know if I have to change something in my jumper? Seems stick values don't reach max values or something similar.

It's something to do with the scaling of the stick, you may have to set it to over 100% to recognize gesture properly. I use a switch on my devo 10 for acro mode instead. I can flip between 2 modes literally on the fly.

You mean I can configure a switch on my jumper to perform 3 commands? (left-left-down) I'm trying in mixer - complex but no success for now.

Not sure what you meant by jumper.

To put acro mode on a switch, we have to configure (edit the source file of) the firmware (silverware) to put the acro mode control on a channel. (Remove the corresponding gesture to save code space. Optional) Recompile the firmware and flash it onto the FC. Then reconfigure devo 10 to put that channel on a switch.

wasp09 wrote:

p1p3rn0 wrote:

wasp09 wrote:

p1p3rn0 wrote:

wasp09 wrote: I brought an F36 but have been flying it with another FC that supports silverware and using a protocol supported by deviationtx, Get one of those for around $10 instead of chasing after mission impossible. F36 is good mainly because of it has bigger motors. I don't see why we have to stick with its unknown protocol.

Thank's! Now me too I have one of those for around $10 and I'm very happy
The only thing I'm in trouble is changing settings ..for example acro mode (left-left-down): many times it doesn't react.
Did you know if I have to change something in my jumper? Seems stick values don't reach max values or something similar.

It's something to do with the scaling of the stick, you may have to set it to over 100% to recognize gesture properly. I use a switch on my devo 10 for acro mode instead. I can flip between 2 modes literally on the fly.

You mean I can configure a switch on my jumper to perform 3 commands? (left-left-down) I'm trying in mixer - complex but no success for now.

Not sure what you meant by jumper.

To put acro mode on a switch, we have to configure (edit the source file of) the firmware (silverware) to put the acro mode control on a channel. (Remove the corresponding gesture to save code space. Optional) Recompile the firmware and flash it onto the FC. Then reconfigure devo 10 to put that channel on a switch.

yets wrote: sirdomsen.diskstation.me/dokuwiki/doku.p...=basic_devo_multipro - acro switch set up

To compete the gesture it needs to have high rates as there is a specific time for the gestures to register on the FC. What rates are you using?

Thanks for the info!
jumper is my new radio: www.rcgroups.com/forums/showthread.php?2...G-transmitter-review
I think it's the same as devo and I was thinking it was possible to configure a switch to perform a sequence of commands (left-left-down) when you tell me about acro by switch.
Anyway I will try silverware recompile and flash.
This is my fc: betafpv.com/products/betafpv-lite-brushed-flight-controller ..how to connect to pc?

I am using Bwhoop FC's

www.tmart.com/BoldClash-Bwhoop-RC-Quadco...r-Board_p362763.html

goebish wrote: A STLink V2 is required to flash silverware to this board:
www.aliexpress.com/item/ST-Link-V2-Progr...New/32631496848.html

wasp09 wrote: I am using Bwhoop FC's

www.tmart.com/BoldClash-Bwhoop-RC-Quadco...r-Board_p362763.html

Many thanks!!!
True we are OT, but I'm thinking this is best way to use furibee F36 ..like wasp09 sayed

Weather is bad here, so I started to play with the LT8920 again.
Here are my findings:
I have started with the Arduino codes Goebish shared.
I have hooked up two Arduino Pro micros to two XY-WB module.
I can send out the CH0 binding packet and receive it with the another LT8920 module. There was an bug/side effect in the bool LT8900::sendPacket(uint8_t *data, size_t packetSize): it prefixed the packet with the packet size.
At binding (when the throttle is not in the lowest most position) seems to be transmitting on CH0, 12 and 24 as well.
There are some packets which only sent at the binding beginning: (try to turn on the TX then the quad and it will not bind) and these packets sent on the non 0 channels.

Stay tuned!

Neat! I was glaring at my F36 sitting on a table... I have other models but I spent a while soldering a tiny 25mw VTX power lead onto the board and can't bring myself to discard the FC, did you make any progress binding and sending commands?

Thanks!

martonmiklos wrote: There was an bug/side effect in the bool LT8900::sendPacket(uint8_t *data, size_t packetSize): it prefixed the packet with the packet size.

I've written a LT8900 emulator for the Shenqi protocol a long time ago. It's available in the Multi code here: github.com/pascallanger/DIY-Multiprotoco...RF24l01_SPI.ino#L493
You'll see that there are different flags that I've implemented just like the real LT8900 to enable/disable features. One of them is used to turn on/off the packet size in the payload

The working Shenqi protocol is an implementation of this emulation layer. It's available here: github.com/pascallanger/DIY-Multiprotoco.../SHENQI_nrf24l01.ino

I hope it can help, Pascal

Hi planger,

Do I understand it correctly that you are emulating an LT8900 with an nRF2401 in this project?

Yes, it emulates send and receive.
Not all the features of the LT8900 component are emulated. I've done what was needed to get the protocol Shenqi working and more with adding flags that were detailed enough to be implemented without having any test component in hand.

Good morning

I have a jumper since yesterday, and I have a furibee f36.

Is it already known which protocol works for the furibee f36?

With kind regards Richard

Hi Richard,

AFAIK there is not any way to control a Furibee F36 other than it is original remote.
It uses an LT5916 with integrated radio which makes the reverse engineering of the protocol a bit harder.

Today I have pissed myself off again, so I have started to play with LT8920 again.

No real progress yet (I still cannot even start the binding procedure), still trying to figure out the radio config.

I write my findings here because it might be useful to others.

So my setup is: an Arduino Pro micro hooked to a XY-WB module.
Aduino code (including the LT8900 polished lib) from Goebish from this thread.

The following seems to be verified:

• 3 byte preamble (0x555555)
• 8 byte syncword: 0x74097111cb783004
If any of these config changed no packets received (the sync word max allowed error bits set to 0).

• From FEC wise I only know that the FEC is whether FEC_NONE or FEC_13. If I set to FEC23 the FEC23 in the 48th register got set.
  (The Chinese 8900 documents its error bit behavior: FEC23 错误标志位,1 表示错误,0 表示正确 == FEC23 error flag, 1 for error, 0 for correct, the 8920 says nothing about it's interpretation...)
• No CRC: if it set the CRC error will be set in the 48th reg

---

So the open questions are:

• Trailer length
• Packet type
• FEC

Basically what I am trying to do is capture the channel 0 from the transmitter while it's throttle is not in neutral position and play back to see if the quad starts blinking faster.

Unfortunately my SDR setup is not going to be functioning since I bought a downconverter for higher frequencies (2500-2800 MHz) so it is pretty shooting in the dark.

Any help, guidance is highly appreciated!

Well my intentions to fly a Furibee with a custom TX has not lowered. Due to my unsuccessfulness with SDR and brute force register peeking I got some inspiration from here:


I have managed to XRAY the IC in the F36 TX (see attached photos). The bond wires between the MCU and RF part are clearly visible.
I will try to decap that area and sniff the wires with a logic analyzer.

Ps. if you have decapping experience please let me know!

Well or I will just step back one

Well I tried the easy way: the laser and unfortunately it destroys the bond wires. I have to figure out how can I get some fuming nitric acid.