Writing the Rx code?

I've got a new toy coming - an RC yacht. Telemetry for these things is limited. Eagle tree has some stuff, but it uses it's own Tx/Rx pair, is targeted at power boats, not wind driven, and is incredibly expensive.

I was thinking that the flexibility of deviationtx would make it a great tool for experimenting with this stuff. I.e. - grab an arduino or RPi and an nrf24l01 from my parts bin, order some I2C sensors from one of my non-rc toy stores, and I'm set for hardware.

But I need Rx software. Would one of the NRF24L01 protocol modules provide a good starting point? Or would I be better off designing a protocol from scratch? I was thinking about abandoning the channel packet model, and going with a device addressing protocol that just reported changes, sort of like the protocols the sphero or the pololu servo controller use. I would actually prefer the latter, as it would allow for a future controller that ran on a mobile device that could address however many device id's I allowed in the packet.

Anyone got any advice?

I would check the web, there are plenty of topics projects around related to DSM/X, FRSKY and Flysky.

www.rcgroups.com/forums/showthread.php?t=2124647

www.rcgroups.com/forums/showthread.php?t=1798913

www.rcgroups.com/forums/showthread.php?t=1726960

Hi,
I want to do the same thing : plug a A7105 (Hubsan/Flysky) to a naze32 (flight controller) to make a receiver with telemetry. All the data available on the flight controller will be available on the radio.
Why A7105 ? Cause i don't have multimod, so i can't use telemetry with NRF24L01. (Don't found the space in the Devo10 to put multimod)
I try to modify FlyskyRx code, but i don't have the time....
Starting from Hubsan will be easier, but i don't have the source..

probably, and better range too.
but i love diy...
Oh and changing pid from radio would be nice

PhracturedBlue wrote: FrSky has a pretty open-architecture for telemetry. So another option would be to use an Frsky receiver with custom telemetry modules.

Is there official documentation? I've been working with the DSM telemetry because the ports have been reverse engineered and the FrSky protocol in deviationTx seems to be a bit wonky as yet.

Of course, it seems like the DSM protocol with telemetry enabled has it's own problems, so maybe I ought to look at the FrSky stuff again.

A very good option would be to develop the Flysky AFHDS 2, protocol. Not sure if there are already informations on the web.

-Very cheap RX options (multiple types)
-Diversity antennas
-DATABUS for telemetry sensors on Rx
-Good Range Reports
-A7105

github.com/esden/superbitrf-firmware

Could have DMS / DMX

1bitsquared.com/products/superbit-cyrf-module

Deviationtx Devo10 is on recommended tx list.

There's plenty of room for the multimodule in a Devo 10. SebyDocky's tutorial video shows how he put it in his.

Is there an AFHDS 2 protocol module available for deviationTx? It's not in the latest version of the team repository. And I cant seem to find docs on the DataBus.

The superbit stuff looks interesting, but CYRF modules seem awfully dear.

To use an existing protocol, I need a protocol that deviationTx supports, Rx's, and documentation on how to build my own sensors. So far, the best bet seems to be just going with DSM Rx's and using the reverse engineered sensor docs. But adding a robotics style protocol to deviationTx sounds like more fun.

Would be cheaper to build your own module and codes in the git.
And CYRF6936 based module is cheapest/lowest part count (simplest RF section).

Or

Buy lemonRC Sat and use that for parts....
And would give everyone a sporting chance of building there own hardware.
Banggood does carry now all tools + extras for DIY route.

SadSack wrote: Would be cheaper to build your own module and codes in the git.
And CYRF6936 based module is cheapest/lowest part count (simplest RF section)..

What do you mean by "build your own module"? Buy an RF module & microprocessor? Or design and build a board to mount RF module & cpu on? Or something else?

As far as I can tell, they CYRF RF modules start around $20 for an RF module board, and $3 for the chip. The NRF24L01 module boards start at $1. Personally, I favor the NRF24L01 or A7105 because I have spares of those from deviating my Tx's.