Simple enhancement for PressureSensor example (Weatherstation)

[Heinz]

The pressure sensor example of the mysensors library contains a simple forecast algorithm. When integrating this into FHEM I noticed that the forecast is "stable" most of the time. What I wanted to have was an additional indicator which displays the current weather situation based on the sealevel pressure of 1013hPa. Well, actually this is what a simple analog weatherstation does. So I modified the PressureSensor example so that it transfers a second sensor value: weather situation

enum WEATHER_SITUATION
{
	VERY_LOW_PRESSURE = 0, // p>-7.5hPa
	LOW_PRESSURE = 1,      // p>-2.5hPa
	NORMAL_PRESSURE = 2,   // p <+/-2.5hPa	
	HIGH_PRESSURE = 3,     // p>2.5hPa
	VERY_HIGH_PRESSURE = 4,// p>7.5hPa
};

WeatherStationSensor.ino

The FHEM plot looks like

Sorry for the german labels:
Vorhersage = forecast
Wetterlage = current weather situation

HH = very high pressure
H = high pressure
T = low pressure
TT = very low pressure

In the picture you can see that the forecast is sunny though the current weather situation is rainy: indeed it's raining cats and dogs and cows at the moment.

BTW:
To make it a real weatherstation i merged the dht-22 code into it to get the humidity value, too.

[hek]

Adding a humidity sensor and making a full fledged Weather-station example really makes sense together with the current situation data.

Would it be possible for you to create a pull request of this to the dev-branch?

Converting it to 1.6 is quite simple (you can look at the other examples if you need additional help):
https://docs.google.com/document/d/1NKq5uuNdnxF5jWnum7VT32mbKLjuvqlx2A5D1qQ-H3Q/edit#

[Heinz]

Ok, no problem, I will create a pull request this weekend.
rgrds Heinz

[Heinz]

Pull request done.

[mfalkvidd]

Link to the PR in case someone wants to find it later: https://github.com/mysensors/Arduino/pull/261