[AllyCat]

Hi,

The data packet with Wind data (which includes Gust, 2 min average speed, 10 min average speed and direction)  is the only one that is sent at each 3 seconds.

So a "user" (Toby) could change the definitions to (perhaps) "fast gust" (1 second or less), "normal gust" and "average" (2 or 10 mins as desired) ?

It doesn't need an Ultrasonic sensor to measure faster gusts:  For example: Measuring the PERIOD of a single rotation of a cup anemometer may be good enough.  Then the Gust (speed) = "Reference distance" / "Time of one revolution (or pulse period)".  The "distance" would be the "circumference of the cup rotor" multiplied by the "Anemometer factor"  (divided by pulses / revolution when necessary).

I don't know enough about the Arduino hardware, nor Weatherduino software, to say if that would be an "easy" or even a "possible" modification to the software.  

The relief at home is particular with winds which come from the valley by going up (it is very particular on the left with 100m or on the right there is more this phenomenon.
If you look at the comparative one on MéteoCaldas, you will see that the direction of the winds at home is often different.
I simply seek to understand this phenomenon at home.

That is rather more difficult.  It is reasonably "easy" to calculate a gust speed over any (short) time and then choose the maximum (fastest) value to transmit (and read) at a more acceptable rate.  

But what is the "maximum" of a wind DIRECTION ?  Theoretically, there is the "Rate of Change of Direction" but most (good) wind vanes are damped to avoid fast swings (see all the complaints about the Fine Offset vanes because they are NOT damped). So for that, perhaps you  DO need an Ultrasonic Sensor !

Cheers,  Alan.

PS: I don't know how well the "Translator" can manage this technical stuff.  Feel free to explain in Portuguese if it helps.