• Author Author: wymand
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TI HDC1000EVM Temperature sensor and thermal mass

wymand


NOTE!!! After 7 months the sensor has died.

The first symptoms were erratic reads.  The comment below was to try and stabilize the

readings.  Sorry but I will stick to the cheap ones that have worked for years.


The TI  HDC1000EVMHDC1000EVM that I tested is great however there is one thing to keep in mind

Thermal mass:


The thermal mass of the TI  HDC1000EVMHDC1000EVM is very low which is excellent for instantaneous temperature or fine resolution

temperature sensing.  However you may want a more moderated response.  In graphing my sensors over time the TI  HDC1000EVMHDC1000EVM

was wildly erratic but it is mounted outside and the low thermal mass means the sensor reacts to the momentary temperature.  If a

breeze blows it will change the temperature to reflect the instantaneous temperature and not the average temperature.


Since I wanted a nice smoothed graph of outside temperature I added thermal mass by putting some modeling clay around the sensor.

What ever you use it has to be non-conductive of course.  Now I get a nice smooth graph of outside temperatures.


I also have updated my graphing software posted elsewhere on this system and will post the updated code (Python JPG graph output)


Thank you again Element 14 for allowing me to road test this device.  I love it.


   Doug Wyman

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