Add samples for CED7000 shot timer

[ppapadeas]

Signed-off-by: Papadeas Pierros [email protected]

[zuckschwerdt]

Thanks! Your analysis seems to be a perfect protocol description already!

Note that each repeat of the signal is prefixed with a aaaa preamble and then a 4d5e (de-)sync word, which does not decode as MC.

[ppapadeas]

thanks @zuckschwerdt for the initial review.

Looking at the decoded data I cannot find the 4d5e , how do you mean?

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-01-10 19:57:56
model     : CED7000      count     : 1             num_rows  : 1             rows      : 
len       : 280          data      : 00008092800928009212f003c0002024a0024a002484bc00f00008092800928009212f
codes     : {280}00008092800928009212f003c0002024a0024a002484bc00f00008092800928009212f
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-01-10 19:57:59
model     : CED7000      count     : 1             num_rows  : 1             rows      : 
len       : 280          data      : 00004049200c2c00a982f003c000101248030b002a60bc00f00004049200c2c00a982f
codes     : {280}00004049200c2c00a982f003c000101248030b002a60bc00f00004049200c2c00a982f
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-01-10 19:58:12
model     : CED7000      count     : 1             num_rows  : 1             rows      : 
len       : 280          data      : 0000c02ce80424808c82f003c000300b3a0109202320bc00f0000c02ce80424808c82f
codes     : {280}0000c02ce80424808c82f003c000300b3a0109202320bc00f0000c02ce80424808c82f

[zuckschwerdt]

Try to get the raw PCM data (the MC decode will hide errors -- it is "lossy"):
rtl_433 -X "n=CED7000,m=FSK_PCM,s=1300,l=1300,r=9000" or
rtl_433 -X "n=CED7000,m=FSK_PCM,s=1300,l=1300,g=3500,r=9000"

[zuckschwerdt]

Why though? :) Any MC data stream of about this length could be this device. But read PCM, find the sync and only then decode MC. Now you know it is this device proper.

[ppapadeas]

Thanks for the pointers @zuckschwerdt !

After using this rtl_433 -X "n=CED7000,m=FSK_PCM,s=1300,l=1300,g=3500,r=9000, match={12}0xf55" -f 434348000
I am getting this results:

time      : 2023-01-12 10:12:36
model     : CED7000      count     : 1             num_rows  : 4             rows      : 
len       : 204          data      : f55549abd2cb34aaacaab4acb532aab5332caaaaad34b552b54, 
len       : 201          data      : aaaa4d5e9659a5556555a565a99555a99965555569a5aa95aa0, 
len       : 201          data      : aaaa4d5e9659a5556555a565a99555a99965555569a5aa95aa0, 
len       : 0            data      : 
codes     : {204}f55549abd2cb34aaacaab4acb532aab5332caaaaad34b552b54, {201}aaaa4d5e9659a5556555a565a99555a99965555569a5aa95aa0, {201}aaaa4d5e9659a5556555a565a99555a99965555569a5aa95aa0, {0}
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-01-12 10:12:40
model     : CED7000      count     : 1             num_rows  : 4             rows      : 
len       : 204          data      : f55549abd2cb34aab4aab4b2caacaaaab534aaaaaab4d2d4b54, 
len       : 201          data      : aaaa4d5e9659a555a555a59655655555a9a5555555a696a5aa0, 
len       : 201          data      : aaaa4d5e9659a555a555a59655655555a9a5555555a696a5aa0, 
len       : 0            data      : 
codes     : {204}f55549abd2cb34aab4aab4b2caacaaaab534aaaaaab4d2d4b54, {201}aaaa4d5e9659a555a555a59655655555a9a5555555a696a5aa0, {201}aaaa4d5e9659a555a555a59655655555a9a5555555a696a5aa0, {0}

Is there a way to see a binary representation of those?
Rows 2 and 3 work perfectly in bitbench applying manchester on top of the original results, but on row 1 I am having issues with the possible initial sync/preamble not being byte sized(?)

[zuckschwerdt]

BitBench is the right tool for other representations, from rtl_433 you'll only get hex codes.
In BitBench try 8b or even just v
The alignment in the first row is off, and that is always to be expected. Best to align on the sync word, e.g. use
rtl_433 -X "n=CED7000,m=FSK_PCM,s=1300,l=1300,g=3500,r=9000, preamble=aa4d5e"

[ppapadeas]

merbanan/rtl_433#2319 contains a working description of the protocol that works with the captures of this PR.