NANO-CUL.md

wmbusmeters with NANO-CUL

Raspbian Buster + wmbusmeters with NANO-CUL (mbus) 868 Mhz

NANO-CUL (mbus) 868 is a lot easier to use because it only requires wmbusmeters. The resources (memory) required are also less compared to the variant with RTL-SDR and rtl-wmbus.

Please not, that you do need the NANO-CUL (mbus) 868 Mhz for wmbusmeters not for ***\*FHEM\****!! . smart-home-komponente.net can flash the firmware for wmbusmeters.

Install dependencies

• wmbusmeters Program receives and decodes WMBus telegrams https://github.com/weetmuts/wmbusmeters, build see: build-wmbusmeters

Install dependencies

• wmbusmeters Program receives and decodes WMBus telegrams https://github.com/weetmuts/wmbusmeters, build see: build-wmbusmeters

Integration

In the wmbusmeters reporting mode, data will be published to the MQTT broker topic "tele/wasser/verbrauch".

This data can be subscribed to and processed by other applications. From this point forward your options are endless. Example for simple mode - publish all smartmeter display data:

{
    "media": "water",
    "meter": "izar",
    "name": "watermeter",
    "id": "1231150",
    "total_m3": 166.625,
    "last_month_total_m3": 162.614,
    "last_month_measure_date": "2020-07-01",
    "remaining_battery_life_y": 13,
    "current_alarms": "no_alarm",
    "previous_alarms": "no_alarm",
    "timestamp": "2020-07-16T11:32:38Z"
}

Continuous Daemon/Service

You most probably want to execute the program continuously in the background. This can be done either by using the internal daemon or cron.

Attention: Daemon mode must be enabled in the configuration file (default).

1. Systemd service - on systemd powered systems the recommended option

   sudo cp /opt/ha-watermeter/service.template /etc/systemd/system/ha-watermeter.service
   
   sudo systemctl daemon-reload
   sudo systemctl start ha-watermeter.service
   sudo systemctl status ha-watermeter.service
   
   sudo systemctl enable ha-watermeter.service