CO₂ Calibration - The Quick method - Desktop Only not mobile

This should be done every 1-2 years.

The SCD40 CO₂ sensor has a long lifetime (over 10 years) but it requires re-calibration after 1-2 years back to a 420 ppm baseline!

This article will guide you through a simple calibration of your CO₂ sensor for any Apollo Automation device!

1. Plug in your sensor outdoors and leave it for at least 5 minutes to allow the readings to stabilize. This should be around 420 ppm per NASA.

2. Go to your Home Assistant dashboard and hit the letter "e" - It will pop up with an entity filter then type in "Calibrate CO₂" and select the correct device.

Hint

If you cannot get this menu to pop-up, click somewhere on the Home Assistant dashboard then press your "e" key.

3. Click on the button that says "PRESS" and then you are done.