Hello,
I have a P1 smart meter USB connected to my RPI3 B+ but after a while the P1 meter sort of crashes and the serial port closes.
If i disabel it and renable it it works just fine but will crash soon.
Does anyone else have this problem or the answer to it?

I tried making it work but i keep getting the following error:

Traceback (most recent call last):
File "/home/pi/downloads/domoticz/scripts/watermeter.py", line 21, in <module>
f = file(fn, "r+")
NameError: name `file` is not defined