Hi,
I had a question that how does outdoor unit and a indoor unit of a air con communicate using a signal wire.

So , i hooked the communication wire to an oscilloscope to visualise it . I have attached signal image document.



It is same as of UART. So i hooked it to the serial pin of the ardunio and tried to decode it by changing baud rates, but it did not work, nothing got print to it.

So i decided to decode it manually. By browsing i found that the pulse with duration
32+88 is a 1 and pulse with duration 32+48 is a 0 and the long pulse the gap between the data stream.
I decoded it the format of binary as 1 and 0.
But I found that every 3 minutes it changes the
Pattern.

So my question is can a ardunio do it for me??
If yes!!
how should i program??

 

they have not provided any details about it. instead then have only provided the wiring diagram of the whole unit.