https://community.hubitat.com/t/air-gradient-integration-with-maker-api/100928 geerlingguy/internet-pi#335 https://github.com/airgradienthq/arduino/blob/master/examples/DIY_PRO_V3_7/DIY_PRO_V3_7.ino https://github.com/geerlingguy/airgradient-prometheus/tree/master/AirGradient-DIY https://www.airgradient.com/open-airgradient/instructions/basic-setup-skills-and-equipment-needed-to-build-our-airgradient-diy-sensor/ https://www.airgradient.com/open-airgradient/instructions/diy-pro-presoldered-v37/