Step 1 - Visit the PurpleAir Plugin
Inside TRMNL, navigate to Plugins > PurpleAir.
Step 2 - Hop over to the developer dashboard for the API key
NB: TRMNL is very careful about the PurpleAir API usage. The first call fetches the last 24 hours. Subsequent calls only fetch the delta since last request (up to 24 hours). The estimated depletion time for the free credits is 2.5 years.
Step 3 - Select the sensor ID that you would be viewing
You can find the Sensor ID from the PurpleAir Map URL. Example URL:
https://map.purpleair.com/air-quality-standards-us-epa-aqi?opt=/1/lp/a10/p604800/cC0&select=115463#12.23/38.73235/-9.20914
The id to copy is the "select" parameter value: 115463.
Or via the MAP UI:
Step 3 - Fill in the plugin Form on the TRMNL Dashboard
Fill in the sensor id and the API key that we have obtained above. The "Read Key (Private Sensors)" is optional that is required only for sensors that are private to you.
Step 4 - You're Done!
Based on your device's refresh settings, you'll begin seeing PurpleAir data very soon. Breathe easy!