Home automation at Murasakijou: reading my 433 MHz DSC alarm sensors

After a long break, we are back to my "Home Automation at Murasakijou" series. When I bought my home, it came with a burglar alarm system. If I wanted to keep using it, I would have to pay an expensive monthly subscription to a private security company that installed it. This was during the pandemic panic and so everyone was always at home, and because I live in the middle of a forest in the…