Using ESP8266 with Sensirion SCD30 and BME280 to monitor CO2 level, air humidity and temperature.
Weather station located in Uchaly (Russia). Hardware used: NodeMCU3 (ESP8266) + SHT31 + BME280 sensor.
ESP-32/BME280 combo, solar power with LiPo battery. Location: Immelstetten, Bavaria, Germany.
Meteo data from Vihorlat Mountains, Slovakia. Measured by BME280 sensor. Data is transmitted by IOT LPWAN SigFox Node UART Modem 868MHz.
ESP8266-NodeMCU-12E-BME280 Located at Ernakulam , Kerala , India.