RuuviTag is an open source sensor platform that measures temperature, air humidity, air pressure and acceleration. With the Ruuvi firmware application, Ruuvi sensors continuously broadcast sensor data at 0,8Hz and simultaneously log environmental sensor data at a 5 minute interval for 10 days. Sensors are updated by default at 0,4 Hz. This means that 2 consecutive broadcast messages have the same sensor data. In most uses, battery lifetime normally exceeds 2 years.
Recommended Operating Temperature: -20°C to 70°C(-4°F to 158°F)
Maximum operating Temperature: -40°C to 85°C(-40°F to 185°F)