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CC1101: Capture garage control codes

Javier Vargas Garcia
Prodigy 110 points
Part Number: CC1101

Hello,

I am trying to copy external radio frequency codes around 433MHz, the problem is that there is no communication with synchronization word, I have tried to configure the MDMCFG2 registry to avoid the word, however I am not able to receive anything, I can only communicate two chips CC1101 with each other with sync word, as soon as I try to receive a garage remote control or any other device I do not receive, maybe I'm not doing the routine correctly, what are the registers that I have to modify? Which algorithm should I follow?

Thank you very much, greetings

Javier

  • 0
    TI__Mastermind 36395 points
    Javier,

    This is not something we can help with on this forum, I suggest looking at fully software defines radios. When you think know exactly what packet format and modulation scheme you need then we can help configure it.

    Regards,
    /TA
  • 0 in reply to TA12012
    TI__Guru**** 317180 points
    A garage control remote most likely uses OOK with an old protocol without preamble and sync meaning that you need to use async mode to receive the bit stream.
  • 0
    Prodigy 240 points

    Try searching for the FCC filing for your device. It will describe the signal. 

    Another way to find the format, is to record it with a $20 RTL-SDR, and then look at the recording with some editing software. This is a great way to learn about different encoding techniques, and fun too.