Hi Guys,
I'm trying to find a better option than the MQ2 sensor. The problem with the MQ2 for me is it takes 24 hours to preheat..which I don't understand, but whatever...if there's one that consumes less energy rather than the 5v the MQ2 consumes...that would also be useful. I'm trying to connect 4 thermoprobes, plus the smoke/humidity sensor...so any board recommendations, or would an uno be able to handle that? TIA! 