WM-i MBUS

Robust, ultra low-power cellular IoT M-Bus data logger and data concentrator (DCU), which comes with a built-in LTE Cat.M, NB-IoT cellular module ensuring reliable data transfer in any environment.

The device can be connected to any meter or sensor with a Mbus output (for water, gas, BTU or any sensor like temperature, optical distance measurement (lidar), etc.).

Easily upgrade existing meters to smart meters with cellular connectivity, safeguarding your investments without the need for costly replacements!

Offering a standalone operation, it performs reliable automated meter readings. The device allows connection of a meter or sensor through its input.

It collects M-Bus data of connected meter and sensor, then it transfers at predetermined intervals to the Microsoft^® Azure Cloud IoT platform with MQTT protocol and TLS encryption via LTE Cat.M / NB-IoT network.

The easily installable device was designed for long-term, maintenance-free operation, the WM-i MBUS boasts a high-capacity battery lasting up to 10 years and an IP68 waterproof casing, making it ideal for challenging environments.

Optionally, add-on extension possibilities are available to extend capabilities for PoCs, unique orders (e.g. different connections, adding sensors).

Main Features

IP68-protected casing with fastening points
LTE Cat.M / Cat.NB / 450MHz cellular module with Nano SIM slot
Replaceable, high-capacity battery with up to 10 years lifetime
Connections:
- M-Bus input
- USB-C port (for local configuration and installation)
- External SMA antenna connector (50 Ohms)
Tamper protection (security alarm if cover is tampered) – optional
Cold start (supporting the installation)
Device displacement sensor – activable for PoC
Leak detection, excessive flow/consumption detection (exceeding the normal consumption, warning of a failure) – activable for PoC
Reverse flow detection and measurement – optional, for PoC
Automatic / configurable mobile operator, bands, access technology
Automatic data transmission at preconfigured intervals to Microsoft^® Azure platform (via MQTT)
Optional protocol support: LwM2M, etc. (in case of PoC)
Transfer of meter data (identifier, location, GNSS option)
Pre-configured settings at manufacturing
WM-E Term^® software for local configuration, FW updates
Secure remote configuration / firmware updates via Azure (TLS)
“Deployment mode” supports local installation (status checking)
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