What about Assan?

So I'm finally moving to a Devo8s. It should be here this week, but currently most of my RX's are ASSAN. I find they work really good and are generally fool proof.

So, In the FAQ it says make a request for new protocols so thats what Im doing. I would gladly lend my TX module and and RX for someone to analyze.

Some info via Hobbyking:
www.hobbyking.com/hobbyking/store/__296_...rs-2_4Ghz_Assan.html

Could this be of any help ?

tomsik.eu/assan_x8_hack

and Assan X8 receiver hacking continued

tomsik.eu/assan_firmware

There is a assan_scan archive at the end of the page, firmware and library for avr...

Only thing not working is binding.

I know it's a rx firmware but we all know that PB is a magician

This one uses bitrate not supported by nRF24L01 - 250kbit/sec. You need either use the same chip as they use - nRF2401 (no L), which is not very good - another chip support library, meaning code space can overflow the limit for Devo7E, another module, ancient programming techniques.

Another way is to use modern nRF24L01+ . I found a module - www.elecfreaks.com/store/nrf24l01p-pa-lna-v20-p-142.html .

I can not do this in the nearest future anyway - I still have ESky in works, playing with sunvsuv's code for HiSky (FBL100) and have Tactic SLT (Anylink, TX-Ready) in queue. And anyway, you need hardware for this even if you have a working code example and helpful individual who wrote the code for another platform.

It seems to be a Czech clone of one of Futaba protocols, am I right?

victzh wrote: This one uses bitrate not supported by nRF24L01 - 250kbit/sec. You need either use the same chip as they use - nRF2401 (no L), which is not very good - another chip support library, meaning code space can overflow the limit for Devo7E, another module, ancient programming techniques.

Another way is to use modern nRF24L01+ . I found a module - www.elecfreaks.com/store/nrf24l01p-pa-lna-v20-p-142.html .

Thx for the clarification.

But isn't the chip found on modules like this one http://www.ebay.fr/itm/NRF24L01+ : used to support the V202 and FBL100, appropriate?

It isn't the "p" revision only the nRF24L01+

victzh wrote: It seems to be a Czech clone of one of Futaba protocols, am I right?

I really don't know, just stumbled upon while doing a search.

I suspect that as Nordic moved to production of newer chip, nRF24L01+ (unfortunate name, BTW) instead of nRF24L01 everybody use it. It supports every other Nordic's 2.4GHz chips, both nRF24L01 bitrates - 1 and 2MBit/s and nRF2401 - 250kbit/s.

So with regards to Nordic we probably in the best position - everything is supported by chips which are now in production.

There is a assan_scan archive at the end of the page, firmware and library for avr...

Can you post a specific link?

I think he just copied the line in my precedent post, nevertheless this is the direct link to the assan_scan archive : tomsik.eu/sites/tomsik.eu/files/assan_scan.tar_.gz

mmm just checked the archive it's not really sniffed packets, but code.

If I only knew how to hook it up and a methodology to follow, I would buy a cheap logic analyzer and play with it, so someone else could have a go with the results.

As I have a V2 module and some 4,6,7 ch receivers.

any update information about Prtocol ASSAN ?

???? someone ?

I have no hardware and I need a TX and RX for this. They're expensive to just buy for fun of reverse engineering - I have no personal use for them. Also, there are many versions - 4, 6, 7, even 9 channel. Chances are we need to check many of these modules.

Also, some modules are harder to solder to than others. If you have some, and can take them apart, make detailed photos, and put somewhere (not here, this forum downsizes images) and put a link here that would help to decide of feasibility of such project.

For me it is the same as for dwhacks. I own about 35 ASSAN receivers and just got a Devo 8 from special sale. I flashed it to deviation 4.0.1. Hey folks, great work done here! After short time of usage I can say, I like it more than OpenTX. It works flawlessly with my Blade BNF models.

May be, it is possible to use the native ASSAN module in PPM mode. A problem will be the power supply because the Devo 8 uses 4 AA cells only. When being in other modes like DSM2 or DSMX the ASSAN module should be switched of automatically.

Is that an option that can be done more easyly?

a long time nobody update Assan protocol ? Nrf24l01 almost is public in all protcol atm.

devo 7e ,devo 10 install Assan protocol. great

People who can do this don't have the hardware and any incentive to buy it. Without hardware - TX and RX for testing it is impossible to add the protocol.

If you have Assan PPM TX module you can use it as any other PPM module.

i had it . but i still not yet know how to read signal , use a OSC ? Any guide on youtube ?

when i understand , i will try to post here . Futaba and assan protocol

First of all, make detailed photos of your RX and TX boards near the radio chip and put them here so that we can evaluate feasibility of soldering to it. Some boards are so hard to solder to that it complicates the effort a lot.

Then you need not an oscilloscope but logic analyzer to read the SPI bus. But first the photos.

Anny progres on protocole?

There have been no dumps from a logic analyzer, or even dumps from a board to figure out if it's possible.

If you're serious about getting this done but don't want to do it yourself, I now offer working on protocols as a service. patreon.com/mwm .

Thanks for the info and offer. I think i will switch all receivers to dsm2, sems to be a cheaper option to do.

Regards, Bojan