Hello everyone. I am looking for some help with a little quest.
I have an old fashioned alarm system with wireless sensors around the house connected to a central unit.
The unit is gsm and sends sms or gives phone calls to set numbers (but drains money from the sim card) and obviously triggers a buzzer/siren when it detects intrusion.
My goal is to connect a wifi device (an rfm69 module attached to what? with MQTT language) physically to the siren wires (protecting the device with an optoisolator or a relay) and detect when it goes on and off.
When the signal is triggered I would like the wifi device (rfm69+MQTT) to send the status (on or off) to my openhab or nodered or even better emoncms gateway (a raspberrypi acting as emonhub) so to receive an email or a push notify even better.
I just need some simple instructions to start with. What components to use to connect the siren wires to the rfm69 and from there how to make it send status to the raspberry pi through MQTT.
Any answer will be very appreciated.
Thanks to everyone.