I've attached what one 128 bit code looks like in Audacity. Expanding the x-axis lets you see that each '1' is made of several sine curves. It is on off keying. Zeros have no amplitude.
It probably contains: start + id + action (open/close) + crc bit. These are codes for window sensors. Open and close a window would be different actions for the same id.
Understanding the format would allow recording one code to know both the open and close action. Each code would still have to be associated with a sensor. Otherwise the open and close action could be learned independently without understanding. One 128 bit code would be living room window open. Another 128 bit code would be living room window close. Understanding the format seems like a secondary issue.
Primary issues are receiving the signal and demodulating the signal to a 128 bit sequence.
It looks like the OOK Signal Demodulation project code convert it to a 128 bit sequence. The software is in C. I assume this is for a PC rather than an Arduino. I wonder if an Arduino could do this or does it require Rasp Pi or PC. GNU Radio would work too.
As far as using the T5744, how easy is it to use an IC like this? it is not stocked on DigiKey. How would the frequency be set? It looks like a single pin is for the result. How would this be read? Are there any alternatives with clear instructions around its usage?
