00:01:04 Meet Achim: From Siemens to Thailand and a Wildfire Crisis
00:03:20 Burning Season 2019: The School That Sparked AirGradient
00:07:50 DIY to Open Hardware: Arduino, ESP32, PM2.5 + CO2, and Dashboards
00:12:24 Values: Repairability, Ownership, and CC BY‑SA Licensing
00:16:40 Global Takeoff: Hacker News, Jeff Geerling, and the Kit Era
00:20:16 ESPHome vs Native: Building the Official Home Assistant Integration
00:32:26 Works with Home Assistant Platinum: Local‑First and Privacy by Default
00:36:40 Open Culture, Community, and Academia: Why Sharing Pays Back
00:41:45 UNICEF Laos: ML Air‑Quality Forecasts + Open Map Integration
00:44:55 Roadmap: Larger Displays, Portable Monitors, and More Pollutants
00:46:27 Safeguarding the Mission: Foundation Plan (Switzerland)
00:49:45 Achim’s Home Assistant Setup: Z‑Wave, ESPHome, Geofencing
00:56:16 Real‑World Use Cases: Factories, Schools, and Ventilation Control
01:01:58 Accuracy Matters: Calibration, Pitfalls, and Transparent Limits
01:23:46 Outro and Show Notes