4、Estimate the weather every hour (estimate the weather according to the air pressure diversification in the
former 4 hours). If air pressure value goes up gradually, it indicates that the weather will turn into better. If the
air pressure value goes down gradually, it indicates that the weather will turn into bad. There are 4 kinds of
weather status (from good to bad): Sunshine, Cloudy, Overcast sky, Rainy.
Method:
a) Detect the pressure every 59min 59s
b) The pressure from former 1 hour minus later 1 hour’s, totally 4 value(if the absolute value more than
2.5mbar,then it is useless),only use the valid value for their average. The weather is judge from the average
value.
Sunshine： 0.8~2.5(mbar/h)
Cloudy： 0.5~0.8(mbar/h)
No change： - 0.5~0.5(mbar/h)
Overcast sky： - 1.0~ - 0.5(mbar/h)
Rainy： - 2.5~ - 1.0(mbar/h)
Notes:
temperature measurement by personal temperature (when you wear a watch), the effect of direct sunlight and
humidity. In order to make the measurement of temperature more accurate, please take the watch from the wrist
and place it in a place not directly exposed to the sun and good ventilation and dry the case. It takes about 20 to
30 minutes for the watchcase to reach the actual ambient temperature.
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