Windvane weather sensors with display virtual serial port connectivity

[Tibor]

Hi,

I just my weather sensor. I read through the post - still have a few questions if i understand the wiring correctly:
in github, the wiring:
rj12 - arduino - rj12 - connections
wire color - pin - pin
red - gnd - pin 3 - potentiometer power A - reed switch A
yellow - 5v - pin 5 - potentiometer power B
green - a7 - pin 4 - potentiometer reading
black - d2 - pin 2 - reed switch B

does it mean that the a7 and d2 are the two connections to the wind vane?
My other question: how does it communicate with the Rpi/ through wifi, or I need to connect it somehow?

Best regards,
Tibor