Thanks to the work of github member “Hypfer”, it’s now possible to use the cheap IKEA PM2.5 sensors as a MQTT source. I set it up with my homey as follows:
- Applied the hardware mod with a Wemos D1 Mini
- Put the supplied sketch onto the D1.
- Installed MQTT broker and MQTT client on Homey.
- Set up MQTT on the D1
- Create a virtual device on Homey (type: sensor, air quality) by using the Virtual Devices app
- Add a flow to homey: "
MQTT Client Trigger when a message is received on
PM2.5 (virtual sensor) Set the value of a virtual sensor measure_pm25 to “message recived via topic”
It will work like a charm
And it’s pretty cheap for a smart sensor of this kind.
Find the github repository here: