Developing a universal module

PhracturedBlue wrote: I just saw this:
blog.cyberexplorer.me/2014/01/sniffing-a...ng-nrf24l01-and.html

This is (potentially) half of the holy-grail we've been looking for. It should allow scanning any protocol from any 2.4GHz device at low cost. Of course, it can't transmit, so you can't use it as a universal module, but it could make protocol analysis much easier.

Nice project

Certainly looks like a fun setup, but a bit much with the downconverter and software processing for embedded use.

For analysis I'm not actually sure it's superior to using a logic analyzer on the SPI interface. One thing is that as soon as you start dealing with raw RF, you see all sorts of things which aren't your traffic of interest. It might help with identifying unkown chipsets without opening the case, but with the exception of the chip-on-board Bekin/Hope systems (unlabeled dot of epoxy), that's not really very hard.

In terms of actually making a universal module, the key question would be if there's either a chip that is versatile enough to do everything, or else something that could function as a sufficiently frequency agile up/down converter to allow a $10-20 class FPGA (or possibly even very fast processor) to do the modulation/demodulation at a sample rate consistent with only the instantaneous channel bandwidth, and not the 100 MHz bandwidth of the entire ISM band. If not, there are faster FPGA solutions which could handle the whole bandwidth, but they start getting more expensive and needing more expensive ADCs.

But most of the modules in use are really cheap...

I have 2 questions:

1. Will this module be compatible with the Devo12S?
2. If yes, will it maintain telemetry functionality?

can we order this board yet

Hi PB,

A lot of deviationx's users are waiting very attentively such universal module. Definitively since your return into the scene, the deviationx developpement have again a big boost.

I noticed, a new RF chips appearing on some toy quad, the LT8910 (precisely the LT8910S5C)

www.nst-ic.com/f/1/1311114648.pdf

Do you already know it ?

PhracturedBlue wrote: That is interesting. It looks like it may overlap in functionality with the CYRF6936 such that in some cases you may be able to use one chip to talk to the other. I don't read Chinese, so I can't verify that, but it looks like it supports GFSK at 1Mbps, which is something the CYRF6936 can do. There are other modes that may not be supported, so if it is possible at all, it is likely protocol specific.

Whatever, the performances of this RF chips seems to be not as good as for the nRF24L01


SOC solution with integrated on-chip components including transmitter, receiver, frequency synthesizer, GFSK modem
Power-adjustable transmitter with a max transmit power of 6dBm
Lower-middle-frequency receiver with spread-spectrum digital communication mechanism and -96dBm sensitivity
Energy detection of digital channel for channel quality monitor
Data rate: 1Mbps / 250Kbps / 125Kbps / 62.5Kbps
Transmit distance: 200m
Supply voltage: 1.9V to 3.6V
Operating temperature: -40℃ to 85℃
Sleep mode current:1μA (while maintain the register values)
Frequency-Hopping Spread Spectrum
SPI / I2C interface
Built-in CRC, FEC, auto-ack and auto retransmit
QFN24(4*4mm) and SSOP16 Package (in accordance with RoHS)
Applications: remote control, wireless keyboard and mouse, wireless networking, intelligent home furnishing, industrial and commercial short-range communication, IP phone, cordless telephone and mutual communication between machines

This topic is very interesting .
was wondering if it would be possible to design the board in two pieces.
and connect them together using a cheap ribbon cable of sorts .
thus making each Half circuit useless with out the other half and maybe not law defiant. as a single board would do nothing making the individual boards legal. It would be up to the buyer to obtain both and put them together.???
possibly made by 2 different manufactures

Of its working, could you please send me some pictures of them? Is it also possible to get the schematic? That would be very helpfull for me. Tank you

Does i understand this right? GIO1 is connected to TXEN, and GIO2 to RXEN? Are the other connections as described in Moduleinstallation.pdf?

In TX.ini, i activate the module.
with enable-a7105
Using TMS: ‘A13’(Is this the Chip enable Signal?)
And for what is the "has_pa-a7105" command?

Sorry for those many questions and
thanks for answer