Gas Monitor

ESP32 Bluetooth Low Energy Dashboard

Disconnected

MQ-2 Raw ADC

—

MQ-135 Raw ADC

—

Temperature

— °C

Humidity

— %

Fan Relay: OFF

Buzzer: OFF

MQ readings are raw ADC values, not calibrated ppm. This prototype is not a certified gas alarm. Keep ESP32 ADC inputs at or below 3.3 V. MQ modules powered at 5 V may need voltage dividers.