This project has its roots in a chance sighting of some, what I thought
were, interesting looking API parameters on the
Met Office weather data submission service. I've been running a small weather
station for about a year with its data output being harvested by a RaspberryPi
and packed off to the Met Office observation service.
Many months ago a friend and I were idly browsing to see what
other interesting data people were collecting and sending there when we
spotted, to our surprise, soil temperature measurements using sensors
buried at 10, 30 and 100 centimetres. These depths are certainly not
arbitrary; they may represent three of the many soil horizons: A, B and
C (See the Wikipedia page regarding soil horizons). This sparked
off a thoughts on the possibilities of home made sensing, gathering and
aggregating soil temperature readings to a service on the internet.
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