Solar cells connected in a cube-like shape and exposed to the sun. Depending on the time-of-day (solar incidence) the power generated by each cell may be different.

weather station based on electric imp connected to external unit via radio channel link (nRF24L01+).

Wasserpegel am Zulauf einer Fischaufzucht

sensor box for a small pond in germany

Temperatur und Luftfeuchtigkeit, Luftdruck

Collect and log weather data (temperature, humidity, air pressure) using bme680 and wemos d1 mini in Erlangen, Bavaria, Germany

ESP-01/BME280 powered by 2x 1.5V AA-Cells + 470uF Capacitor; 300s-SensorReadOut Interval with DynamicAverage calculation; 900-3600s dynamic ChannelUpdater Interval (Runtime optimization in relation to the remaining power)

Private weather station at Rolan Mountain, Lennestadt. Elevation: 299m above sea level. Measurements: Temperature, humidity, soon: barometric pressure. Measuring interval: 15 seconds.

Die Wetterdaten aus Julbach

ESP8266 Solar-Daten-Logger

Temperature, pressure and humidity in Weyher in der Pfalz, Germany. Solar powered Wemos with BME280 connected to public Wifi "Freifunk Weyher"

Radioactivity readings with a Geiger Müller kit from Landshut in germany. Measured with a SBM20 tube.

Outdoor Temperature in Dortmund, Germany

ESP8266 und DS18B20

Aktuelle Temperatur, Luftdruck und Luftfeuchte in Lünen