domoticz-watermeter

Python plugin for measuring your watermeter with a NPN sensor on a GPIO pin

why this plugin?

I struggeled with all the manual steps for getting a watermeter in domoticz, using instructions like https://www.domoticz.com/forum/viewtopic.php?f=28&t=17123 or https://ehoco.nl/watermeter-uitlezen-in-domoticz-lua-script/

so i automated the following steps by rewriting the python script i found in the thread above to this plugin

Pin is automatically exported (no need for exporting the pin in shell scripts before starting domoticz)
pluging starts and stops with domoticz, so no steps to keep a seperate python script up and running on your system all is handled within domoticz
Counter is automatically created, so no difficult json commands to create the counter manually

support

is only tested on a raspberry pi 3b+

Installation

install the dependency by giving the command "sudo apt-get install python3-rpi.gpio"
go to you plugins directory
give the command "git clone https://github.com/akamming/domoticz-watermeter.git"
restart domoticz
add the hardware. In the hardwarepage there is a description on how to configure the plugin
Make sure your rfxcom divider setting for water (Setup/Settings/Counter settings) in domoticz is set to 1000.
have fun!

Debugging

If you feel like debugging, there are 2 settings you can configure

If you create the file DEBUG in the plugin directory, debug logging will be switched on
If you create the file TESTPULSE in the plugin directory, the plugin will fake increments on the watermeter. every 10 sec it will act like it got a pulse from the GPIO pin. This can be used for testing purposes