Re: [Discuss-gnuradio] CC1101 GFSK packet decode with variable length

[Andre Puschmann]

Hey,
not sure if this still works but I've worked on a CC1101 receiver a
while ago. Have a look here [1] if you're interested.

Cheers
Andre


[1] https://github.com/andrepuschmann/gr-cc11xx

On 31/12/18 1:00, Alban Meffre wrote:
> Hi
> I would like to decode a simple GFSK packet
> 
> here is the packet structure :
> preamble : AAh x 4
> sync word : D391h
> length byte : 1 byte
> payload : 1 to 64 bytes
> CRC : 2 bytes
> 
> TX : arduino + CC1101 module, 2GFSK, 100kbps, excursion 50kHz, carrier
> 433 MHz
> RX : RTLSDR
> 
> until now i was able to demodulate the signal and add a "sync" tag using
> the correlate access code.
> 
> my goal is to extract the payload and send it to a file or a socket.
> is there a simple way to do that without writing my own block ?
> 
> i can't go further, because i do not manage to find the info i need
> i do not know where to start : stream, tagged stream, PDU, messages, etc..
> i do not figure out how to use these tag for variable length. nothing
> clear in the doc
> 
> i'd be glad if someone helps me
> best regards
> bob
> 
> 
> 
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