ESPHome, Home Assistant Integration, Sensors & ComponentsSCD40 vs SCD41 with ESP32 and ESPHome: Real CO₂ Monitoring for Home AssistantConnect Sensirion SCD40 or SCD41 to ESP32 and ESPHome for real CO₂ monitoring in Home Assistant. Compare accuracy, wiring, low-power modes, self-calibration, offsets and ventilation alerts. panakos23 September 2026