Read anemometer data in background

[alphaville]

Patch

• Data acquisition happens in background
• Data are kept in a buffer
• API documentation (not complete - Jamie, I'm leaving the rest to you)

Basic Example

with Anemometer() as sensor:
    for _i in range(20):
        print(sensor.all_sensor_data)

More advanced example

Here we choose a data processor and a window length

processor = AverageFilter()
with Anemometer(window_length=5, data_processor=processor) as sensor:
    for i in range(20):
        time.sleep(0.1)
        print(sensor.all_sensor_data)

[alphaville]

@Minanchi I've invited to review this because you'll be working with the anemometer @pdavid747 You should review this code because you can reuse it for the GPS @Runway27 Since you'll be working with GPS too, have a look at this code; it is used to interface the anemometer, but it can be reused for any device that sends data over the serial

[jamie-54]

will we merge this

[alphaville]

will we merge this

Yes, this was just a patch to feature/87-read_anemometer_data_on_pi; I'm merging now.