Following my first iteration of the IKEA GRÖNÖ Lamp, I wanted it to be a bit… well less smart?

It’s all working well and good, but if one wants to turn the light on or off, one needs to open the Home-Assistant app/website to control it.

I wanted to add way to allow the light to be manually turned on/off if needed.

So I decided to use a spare HC-SR04 Ultrasonic sensor.

HC-SR04

Now it is possible to simply “swipe” a hand above the light to turn it on or off, and it also updates its status on MQTT so Home-Assistant can be updated too.

IKEA-GRONO-HC-SR04

The code can be downloaded from my github