I’ve got a requirement to put a fire sensor in an enclosed space. (About 1m3.) I’ve already got 3 Arduinos in the space, so obviously I thought of connecting it to an Arduino and having the fire alarm go through my Arduino network.
Other than one instructable showing an MQ2 sensor - which is not a flame or smoke sensor - I’m not finding anything related to Arduino. Domestic type smoke alarms don’t seem to have a simple digital output I can use. Other stuff seems to always be part of a building alarm system and uses a proprietary protocol to talk to the fire panel.
What sensors are there out there for flame/smoke/heat, like a domestic alarm, which has a 5V or 12V output? I’ll even take a serial output if the protocol is available. It also has to run on 5V or 12V (no mains power.)