Wow thanks for your long reply. I will do some more investigation with your suggestions.
I use a 5V PNP, without any resistors. Maybe I should change that too.

Will let you know.

Any idea why I have a mismatch of some hunders of liters every week? I tried to change the position of the PNP very often but that won't help anything. It is not that it counts 505 instead of 500 per day, it just ads random about 100 liters in one hour and then for several hours it's ok. Could it be ...

My PNP with the plugin was running fine, but this week I had 3 times the issue that the measuring went crazy. Examples: in one hour it said I used 400 liters, out of the blue and even one time 15.000 liters. Tried to place the PNP a it different, but so far it didn't help. Anyone else seeing this ...

It is running for some days now and so far so good. But in the last 48 hours I see empty parts in the graphs. Why is this? So far only during the night. Any idea? Capture1.png Do you use ESPEasy? i heard before that a reboot of the unit can reset it to 0. perhaps you can eliminate that the espeasy ...

It is running for some days now and so far so good. But in the last 48 hours I see empty parts in the graphs.
Why is this? So far only during the night.

Any idea?

Yesterday I received this PNP: https://nl.aliexpress.com/item/32826250006.html?spm=a2g0s.9042311.0.0.437a4c4d4F0j02 And I can confirm it works! Installed it without any resistors. But..... I miss some liters waters per day. Maybe I have to place it bit different on the watermeter. In about 10 hours ...

Forgive my stupidity, so no resistors at all and configure pull up in the settings. And that pullup is build in the Pi, that ineternal 10k or something? Gonna try that, but comared to yours, I think I need the 5V then. I did not use any resistor, only connected the sensor as described in this ...

So you don't use any resistors at all? Correct. I only configured the internal pull up resistor Forgive my stupidity, so no resistors at all and configure pull up in the settings. And that pullup is build in the Pi, that ineternal 10k or something? Gonna try that, but comared to yours, I think I ...

Hmmm I connected my NPN as the scheme above. Took 3 resistors (1k), as you need 2k, I soldered them after each other to make it 2k. Connected it to my Pi 3 model b at the pins shown above. But it doesn't count. If I use metal in front of the NPN I see the led turing on. I ordered one from Ali ...

Ok, will stick to the forum then. Welcome, happy to make your plugin working 100%. I think I need a bit more explanation about the pull-up resistor.... sorry. So, long story short, this has to be used to make it work? watermeter.JPG You said: "Mine works also fine directly connected. Not at once ...

Started from scratch. Removed all and used your latest version 1.01 Placed an empty TESTPULSE and didn't connect a PNP yet. Set it to GPIO21 with resistor NULL But then I get this error and NO device is created: 2019-12-20 21:35:53.458 Error: (Watermeter) 'onStart' failed 'AttributeError':'module ...

SOLVED! If you are using Raspbian Stretch, RPi.GPIO is NOT included in Python 3.5 by default. sudo apt-get install python3-rpi.gpio After that.... I have a new device Watermeter. TESTPULSE option seems to work. So now the real work, get the NPN connected and working. EDIT1: did you use the script by ...

Thanks, reinstalled the plugin. few things i can think of: 1. Can you try to install other plugins (e.g. you could try the buienradar plugin) to find out this issue is specific for the watermeter plugin? Installed buienrader, works 100%. 2. Did you already try to make the plugin.py exeutable (chmod ...

Version: 4.10717
Build Hash: b38b49e5
Compile Date: 2019-05-09 13:04:08
dzVents Version: 2.4.19
Python Version: 3.5.3 (default, Sep 27 2018, 17:25:39) [GCC 6.3.0 20170516]

Pi 3
PRETTY_NAME="Raspbian GNU/Linux 9 (stretch)"
NAME="Raspbian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
VERSION_CODENAME=stretch
ID=raspbian

Python 3.5

2019-12-18 22:23:10.717 Error: Watermeter hardware (6) thread seems to have ended unexpectedly 2019-12-18 22:23:24.720 Error: Watermeter hardware (6) thread seems to have ended unexpectedly 2019-12-18 22:23:29.986 Error: (WMPS) failed to load 'plugin.py', Python Path used was '/home/pi/domoticz ...

Yes. Earlier I added my smart meter, so that should work.

I see the hardware is added to the list, but no new device

Ok, hardware can be found now in the list. But after the add and the message, device added, there is NO new device!

Any idea?

Seems I had to install de python DEV part......

Update: i have found the gpio pins using the domoticz driver very unstable, so if someone can answer my previous post, that would be much appreciated Nevertheless for now i accept this. But to circumvent all the manual steps written in this thread i've rewritten the python script to a domoticz ...