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Step 8Implementation 2 - weather station
When I equipped the server room with temperature sensors, I just couldn't resist putting some on the roof aswel!
The weatherstation is a bit trickier than the serverroom.
There is a lot of interference outside.
The sun may hit a sensor, sending it from -1 to 30 c in 5 minutes.
I solved this by using three sensors placed at points which would receive sunlight at different times during the day. Since heat is the only "noise" in the measurement, I just use the sensor with the lowest reading at any time as my "outside temperature".
This temperature is again smoothed by averaging the last few minutes.
The weatherstation is a bit trickier than the serverroom.
There is a lot of interference outside.
The sun may hit a sensor, sending it from -1 to 30 c in 5 minutes.
I solved this by using three sensors placed at points which would receive sunlight at different times during the day. Since heat is the only "noise" in the measurement, I just use the sensor with the lowest reading at any time as my "outside temperature".
This temperature is again smoothed by averaging the last few minutes.
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Sep 5, 2010. 3:29 AMwareneutron
says:
you have to work in weather forcast
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