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Excessive precision on readings #23

@malcolmmackay

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@malcolmmackay

An anonymous user has stated the following by email:

Since the HDC2022 specs states Humidity accuracy: ±2% (typical), ±3% (maximum) and Temperature accuracy: ±0.2°C (typical), ±0.4°C (maximum) It seems that you should be using only integer humidity and 1 significant fractional digit for temperature.

I accept this is a mistake. Thank you to the user above for pointing it out.

To quote David R. Caprette:

Whenever you make a measurement, the number of meaningful digits that you write down implies the error in the measurement. For example if you say that the length of an object is 0.428 m, you imply an uncertainty of about 0.001 m.

As it stands, both temperature and humidity readings are given to 2 decimal places. This level of precision is at best unnecessary and at worst misleading, given the accuracy of the HDC2022 sensor on cuplTag.

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