Arduino Pro Mini (3.3 V, 8 MHz) measuring outside temperature and humidity using a DHT21. Powered by 3 AA eneloops using (only) the on-board voltage regulator. Battery voltage is measured by internal ADC. Wifi connected by esp8266

Weather data from BME280 sensor located in Montreal, Canada.

ESP8266 WiFi with DHT22 Temperature and Humidity Sensor

Ambient temperature

Barometric pressure in hPa

ESP8266 ESP-12 DHT-21 BMP-180 House Weather Station

Outside Temperature and Relative humidity in Brampton, Canada. DHT22 measures and solar powered ESP8266 uploads.

AIUD TEMPERATURE HUMIDITY AND ATMOSPHERIC PRESSURE

Plant Environment Data Gathering 2x DS18b20 1x ADS1115 + Moisture Sensor

http://homes-smart.ru

CO meter

Temperature / Humidity Monitor

Vijayanagar, Bangalore Weather

Room temperature & humidity

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