Rather than replacing IKEA’s electronics, the microcontroller is simply listening in on the UART communications between the sensor and the original controller.
While some of us would have been tempted to gut the VINDRIKTNING and attach its particle sensor directly to the ESP8266, the approach has used is actually quite elegant. Just three wires link the ESP8266 to the PCB. Looking to improve on this simplistic interface, tacked an ESP8266 to the board so it can broadcast sensor readings out over MQTT.
Introduced back in June, the IKEA VINDRIKTNING is a $12 USD sensor that uses colored LEDs to indicate the relative air quality in your home depending on how many particles it sucks up.
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