ChipsHackadayabout 1 hour ago
Maker Creates CO₂ Sensors That Fail Visibly
1 min read
William Collis addresses the risk of silent CO₂ sensor failure by modifying Sensirion SCD30 units to flash a visible fault LED. The setup uses Seeed XIAO ESP32-C3 chips running ESPHome firmware to communicate with Home Assistant, ensuring a flat unchanging number no longer hides a dead sensor without alerting the user.
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