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Ambien ESP32 CO2 sensor with 4.2 inch e-paper display showing temperature humidity and CO2 readings
amateur radio open source Technology

Ambien: An ESP32 CO2 Sensor With E-Paper That Runs a Year on Two 18650s

9M2PJU 03.11.2026

mcer12's Ambien pairs an ESP32 with Sensirion CO2 and humidity sensors and a 4.2 inch…

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