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Topic: Unknown 433MHz remote signal (Read 97 times) previous topic - next topic


Hi all,
I have some experience in electronics and I have been using Arduino for a while. I am trying to make a copy of a 433 MHz remote control for my apartment because they have asked a huge amount of money for a copy.

I have investigated original keyfob and it has some kind of microcontroller in it. There are no dipswitches, jumpers etc. I wired up a small 433 receiver to my logic analyzer and I looked up on a signal and it is not code hopping. (transmits same signal every time) I tryed rc-switch library with no luck. Can anyone recognize this protocol? I can actually implement it using bit banging but I don't want to deal with hundreds of high and low pulses. So, trying to find a pattern or protocol itself is better approach for me.

Timings are varying a little bit,
Short signals: 0.43-0.51 ms
Long  signals: 0.91-1.01 ms

rc-switch library: https://github.com/sui77/rc-switch


Feb 14, 2020, 10:41 pm Last Edit: Feb 15, 2020, 02:19 am by jremington
That is certainly not an RC-Switch type protocol. 

If you have only one example of a signal, there is no way to deduce the actual encoding scheme.  Cloning may be your only option, and that is presumably just a matter of recording and encoding the on/off timings in a convenient form (as done with IR remotes).

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