Can anyone suggest if a commercial PIR 433 MHz can connect with a Transmitter_Receiver 433 MHz module .
If they support same modulation, should work.
But if it’s from alarm system, there might be two way communication or rolling code.
My Pir 433 Mhz sensors work with both the Sonoff Rf Bridge (flashed) and RFLink.
My CT60M’s works very well on RF433 (using them with a Sonod bridge tx/rx)
Love the fact they do over 2 year with their batteries 