Simple geolocated air quality(AQI) notifier , on an esp8266 Wemo R1D1 wired with a 0,96 oled screen. Should work on any esp8266 card, with maybe a few adaptations...
Use the https://aqicn.org API (https://aqicn.org/api/) Suscribe to get a free API key, change the reference in the sketch, and you're good to go !
World Map of the https://aqicn.org/ project is here : https://waqi.info/
11/03/2025: I've added real time Nasdaq and CAC40 indices infos, to help you get included in the global economy movement, and help you to make the right choices about it.