IKEA recently discontinued Vindriktning, their older air quality monitor.
Inside the device, they put a cubic PM1006K particle sensor. I bought three for $16.95 each last year, because I’d seen people hack them by adding sensors and a Wi-Fi microcontroller to send all of the data to Home Assistant. For my modding I bought:
The YouTube video linked above is a great guide to follow. I didn’t connect wires to the fan or the light sensor since I had no use for them. I also didn’t stack my sensors because I wanted the BME280 to be outside of the enclosure, where it would be less affected by the heat produced by the ENS160 and D1.
Even with the sensor outside of the case, the BME280 still reads high, because it heats itself up. I actually tested different lengths of wires and placements of the sensor before realizing I was still going to have to adjust the data. An ESPHome filter made the adjustment easy, which I did individually for each unit after comparing to a mobile Ecobee thermostat sensor. This is the code from the unit for my shop.
substitutions:
slug: shop
friendly: Shop
esphome:
name: ${slug}-air-quality
friendly_name: ${friendly} Air Quality
esp8266:
board: d1_mini
logger:
level: WARN
api:
encryption:
key: 'xxx'
ota:
- platform: esphome
password: 'xxx'
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
manual_ip:
static_ip: xxx
gateway: xxx
subnet: 255.255.255.0
i2c:
frequency: 100kHz
uart:
- rx_pin: D7
baud_rate: 9600
sensor:
- platform: pm1006
pm_2_5:
name: PM 2.5µm
- platform: bme280_i2c
address: 0x76
temperature:
name: Temperature
id: ${slug}_temp
filters:
- offset: -3.38
humidity:
name: Humidity
id: ${slug}_humid
filters:
- offset: 7.63
iir_filter: 16x
- platform: aht10
variant: AHT20
temperature:
name: AHT21 Temperature
id: ${slug}_aht21_temp
humidity:
name: AHT21 Humidity
id: ${slug}_aht21_humid
- platform: ens160_i2c
address: 0x53
eco2:
name: CO²
tvoc:
name: VOC
aqi:
id: ${slug}_aqi
name: AQI
compensation:
temperature: ${slug}_aht21_temp
humidity: ${slug}_aht21_humid
text_sensor:
- platform: template
name: AQI Rating
lambda: |-
switch ( (int) ( id( ${slug}_aqi ).state ) ) {
case 1: return {"Excellent"};
case 2: return {"Good"};
case 3: return {"Moderate"};
case 4: return {"Poor"};
case 5: return {"Unhealthy"};
default: return {"N/A"};
}
These resources were a huge help when I wired everything up and made changes to the YAML code:
- D1 Mini Pinout Reference
- IKEA-Air-Quality-Sensor on GitHub
- PM1006 Particulate Matter Sensor from ESPHome
- ESPHome: I²C Bus
- BME280 from ESPHome
- ENS160 from ESPHome
- AHT10 from ESPHome
Here is how I’m displaying the data on one of my Home Assistant dashboards.
As I was working on this project I knew I wanted a couple more air quality monitors around the house, which will be finished soon.
Update: I’ve had to make a small update by adding a 47uF capacitor to each ENS160 board, because they have power issues, causing the reading to stop for periods of time. My boards matched up with the right ones in the picture at that link. Here’s a picture of another ENS160 I modified, since it was a tight squeeze to made the modification on the devices I posted about here with everything already wired up. I also realized I was powering these through the 3V3 pin instead of VIN, so I fixed that.
I’ve also improved the display of the data on my dashboard by using mini-graph-card.
Early this year, I enjoyed watching 
Pretty sure I’ve had this on my Kindle for at least 5 years, maybe even since it was released in October of 2011. After reading the Hardware Hacker and learning so much about electronics lately I felt it was a good time to dive in.
I’ve been on a kick tearing apart electronics. In addition to 
There are seven of them. The top has two and the bottom has one, which correspond to the 3 columns of keys on the grid. Then the left and right sides each have 2, which match up with the 4 rows of keys.
Nick Momrik 