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I bought a cheap pm2.5 sensor and got it working with ESPHome for my outdoor air quality sensor suite. (github.com)

submitted 1 week ago by MuttMutt@lemmy.world to c/homeassistant@lemmy.world

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Long story short I'm in the process of building an outdoor air quality, temperature, humidity, pressure, and motion sensor setup for my front porch. One is the PM1006K which is a cheap (10.00 on Amazon) pm2.5 sensor. It's supposedly used in some consumer air filter systems and a review said it worked with ESPHome... well it does after a ton of poking and prodding with a little flogging of the wires.

The link is to the github page where I have the final product posted. I know there are better sensors available but they tend to run more and the really good ones use a laser sensor and burn out over time so it becomes an ongoing (some only last 8000 hours) expense.

This one is a DC01 Infrared PM2.5 Air Quality Sensor. And I'm pairing it with a DHT22 for temperature and humidity, a BMP280 temperature and barometric pressure sensor, an MQ-2 + MQ-7 + MQ-135 for hazardous gasses and smoke, and a BH1750 light sensor, a AM-312 + a HC-SR04 for motion detection. All running on an ESP32-S3 which is also acting as a Bluetooth Low Energy proxy.

All the code will be able to be found at https://github.com/nightshade00013/MuttMutt-ESPHome when it's 100% completed. But being the pm2.5 working correctly was a huge step in the right direction. And the main reason why I am posting this now so others who are interested in building a cheap sensor can get started.

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[–] MuttMutt@lemmy.world 1 points 1 week ago

Nope this is a different version than the official docs. I tried that and it didn't work at all. This version constantly sends data every second and does not accept communication. You don't even have to connect the device rx pin. The output is via UART continuously, all you can do is receive the output information.