Lightning detector?

Hello,

Does anyone know how to add a lightning detector on my WS2020?
I wouldn’t buy a to expensive device if possible:::::

Is it possible to build it myself???

How far away can those detectors can detect lightnings???

Thanks for your help…

Best greetings from switzerland…

you could use a dallas 1 wire lightning counter.
all you need is a spare com port (or a USB to serial comport)
and you then just configure wd , under setup, comport

see here:
http://www.jjware.com/index2.htm