Currently the appearance of really low power
wireless transceivers at very low prices is motivating
the development of many wireless applications out of
the industrial field, which up to now turn to be large in
size and expensive. We present the design of a tiny and
low cost Wireless Weather Station to measure accurate
temperature (±0.1ºC), relative humidity (±3%), light
intensity and atmospheric pressure (±0.8hPa). These
direct climatic variables and others indirectly
attainable, like the dew-point, wind chill, etc, are
readable through a web page. The chosen sensors are
factory calibrated and have a digital interface. The
Weather Sensor Nodes are able to achieve ultra low
power consumption (40µA average), allowing a single
supercapacitor to power them for 52 days