Using IKEA pm2.5 Air Quality Sensors in Home Assistant

I’ve been doing research on making some custom air quality sensors for inside and outside my house. The laser cutter is a main focus point for these as it would be nice to know how it affects air quality (and in the future, maybe activate an air filter based off the sensors readings). When I found out IKEA makes some simple air quality sensors that can be easily hacked using an ESP device, I decided to try it out.

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Using Z-Wave Groups vs Home Assistant Automations

I installed two Z-wave switches into my house that i wanted to be synchronized, turn on one light switch, have the other turn on too, and vice versa. I first created a home assistant automation that worked using Z-Wave JS to MQTT, this worked but had a lag of a few seconds. I was hoping to find a way to have less latency to make everything work, so in comes Z-Wave Group Associations.

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Motion Sensing Lights with Home Assistant

I’ve already setup some fairy lights on the stairs which come on just before sundown and stay on until bedtime, but I started wondering, can I use them as night lights on the stairs for when I don’t want to turn on the main overheads, and can I do that all with motion sensors. For this project, I’d like to take my lights from here and add motion sensors so they turn on for some time period after being triggered and act as automated stairway night lights.

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Novelkeys Novelty Big Switch Macro Pad

After putting together the EspDeck 9 key pad, and talking to the wife of other places we could make things better, the bedroom fan and lights came up. I mentioned that we could use smart switches for them and make a small 2 key control for our night stands, which she was super excited about, and then I showed her the NovelKeys big switches and it was sold, we were going to have some hilarious macro pads to control our bedroom lights.

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Automated Pantry Light

I have a light in my pantry that isn’t super obvious when its on if the door is closed, and I may leave the light on from time to time by accident. The light switch is also partially buried in things hanging from the wall, so why not automate it to make things a bit easier, that is what smart homes are for. My idea is to use a smart door sensor and light switch to automate it and keep things from being left on.

Goal

  • Turn on the pantry lights while the door is open
  • Close the pantry lights when the door is closed
  • Allow lights to be turned on with the door closed
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