My idea is to make my own smoke detector. I already have a MQ2 sensor on my part list. Somewhere I read that a MQ2 sensor isn't always reliable, but you want a smoke detector to be reliable, so that's why you might consider multiple sensors.
I also have a MQ7 sensor on my list, so I'm considering to combine the MQ2 and 7 to only raise the alarm when both measure 'smoke'. Not really sure about that yet, as I'm still looking about/if smoke always contains carbon monoxide.
Except for the MQ2, what other sensors etc can I use to make my smoke detector reliable? I know I can use a temperature sensor, but I think that there isn't always a higher temperature when there's smoke (especially not at the beginning of a fire).
I'd love to hearing back from you guys! Thanks!