@gohan said in Assistance on sensor project: While you are at it, get some extra parts too, just in case you fry something since in the beginning it is not that hard. And they're cheap.

I hate to disappoint you @micah but @Mike-Musskopf has got a point: MQ* sensors are power hungry. You may want to connect everything up to 240V via a small PSU. There is a big thread on mysensors about air quality detection. DHT is not the best sensor for a battery application. Please check BME280 (pressure, temp and hum) or Si7021 (temp and hum) - these would be my favourite sensors for low power consumption. Small tip - your Arduino Pros must be 3.3V and not 5V for the battery usage.

@Samuel235 I am looking at a CO sensor too, do you have any updates on the ones you are using? What is the exact model?

Go with the Z19. Here's some ready made code: https://forum.mysensors.org/topic/6528/mh-z19-co2-sensor/5

Hi, Working with tgs2602 , tgs 2620 and tgs2611 . I've read the replies from top to bottom but haven't understood how exactly i take data from the graph in datasheet and use it with power regression .