WM-i

Robust, ultra low-power cellular IoT pulse counter 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 water meter with a pulse or 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 up to 3 meters or sensors through its inputs.

It counts the pulses and collects M-Bus data of connected meters and sensors, then it transfers all data to the server or HES at predetermined intervals to Microsoft^® Azure Cloud IoT platform with TLS encryption via the LTE Cat.M / NB-IoT network.

The easily installable device was designed for long-term, maintenance-free operation, the WM-i 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: 2pcs independent Pulse inputs / M-Bus input / USB-C port (for local configuration and installation) / SMA antenna connector (50 Ω)
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
Optional protocol support: LwM2M, MQTT, etc. (in case of PoC)
Transfer of meter data (identifier, GPS 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)
Watchdog

Application

Design

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 (19’000 mAh)
Watchdog

Connections

2 independent Pulse inputs
1 MBus input
USB-C port (for local configuration and installation)
External SMA antenna connector (50 Ohm)

Operation

Automatic / configurable mobile operator, bands, access technology
Microsoft^® Azure platform support (MQTT), TLS (optional)
Automatic data transmission at preconfigured intervals
Configurable alarm thresholds (min/max consumption)
Storage and transfer of meter data (identifier, GPS location)
Tamper protection (security alarm if cover is tampered) – optional
Special “deployment mode” supports local installation (status checking)
Secure remote firmware updates (via Azure)

Accessories

Different battery options (by order)
Universal input cables (for Pulse and / or MBus connection) for tests, POCs, pilots
USB-C cable for configuration (order option)
Antenna (IP68-protected, SMA 50 Ohm – order option)
WM-E Term^® configuration software (for local configuration, FW updates)