In addition to the products available in our portfolio, we design and manufacture devices that our customers demand.

The layout and design of PCBs allow maximum flexibility to add new ports, add extension boards, and integrate different chipsets/modules. In some cases, even the housing of our devices is specifically designed to meet customer standards.


The experience our engineers have collected over the last two decades in working with different embedded microprocessors and microcontrollers is truly invaluable when it comes to firmware development.

Our developers are trained to use IoT secure coding best practices.


Our OpenWrt-based operating system allows our customers to develop their own applications in order to provide industry-specific or edge computing functionalities.

We also offer software for device management.


Retrofit 4G smart meter modems for 2G migration

As telcos are getting prepared for 4G, 5G shutting down 2G and 3G networks all around the world, one of the biggest challenges of the IoT world becomes how to migrate the obsolete 2G/GPRS and 3G communication devices to the latest 4G LTE technology? 4G LTE IoT devices are considered future-proof, as LTE and NB-IoT devices are working with 5G networks using the non-standalone (NSA) architecture.

Protect your investment! No need to change the currently used meters.

Our 4G LTE snap-in smart modems provide a future-proof migration path to the higher speed LTE network with the same functionality. We offer our 4G devices with the same outfit, and 2G fallback compatibility for retrofit purposes.

The modem forms part of the AMI (Advanced Metering Infrastructure) of a public utility company. It is suitable for remote meter readout, meter data download, and remote configuration for provider’s schedule or on-demand requests.

Our smart metering modems are fully compatible with the most popular electricity meters (Landis+Gyr, Itron, Elster/Honeywell, EMH, SAPHIR, PME-PMI,Ensor), designed to fit under the terminal covers, and addresses all technical requirements of manufacturers.


NB-IoT Devices: modems, routers, DCUs, gateways

Narrowband-IoT (LTE Cat.M, and Cat.NB) are a fast-growing industrial Low Power Wide-Area Network (LPWAN) technology classified as a LTE 4G and very well suited for applications that require small data transfers over a long period of time. Low amounts of transferred data results in lower operation costs. Some NB-IoT devices are designed to consume significantly less power resulting in a significantly longer battery life (10 years), which alllows for autonomous operation in remote locations with limited access power sources.

4G LTE IoT devices are considered future-proof, as LTE-M and NB-IoT devices are working with 5G networks using the non-standalone (NSA) architecture.

Advantages of NB-IoT:

  • Great indoor coverage
  • Support for a huge number of connections
  • Extended battery life
  • Reasonable price

WM Systems has years of experience in developing NB-IoT devices (routers, industrial modems) and smart metering modems). We offer a wide range of M2M product for this cellular network: smart meter modems, routers, transmitters.


High-quality IoT and IIoT routers for industrial applications.

These devices are able to manage and control complex connected environments by aggregating and transmitting sensor data, as well as translating communication protocols serving as a bridge between IoT devices and platforms.

Our multi-protocol industrial LTE Cat.4, Cat.1, Cat.M gateways  can be used in many different verticals such as smart grids, building or factory automations, fleet management, security systems, etc., but some are designed for specific applications such as substation management.

There is a growing trend in industrial IoT towards the edge as is the case in many technologies. Our Linux-based routers offer the possibility of Cloud computing functionalities, as users can develop their own apps to run on them.

Data concentrators (also known as DCUs) play an important role in industrial data (IIoT) applications. Data are collected and aggregated from several industrial devices, which are then sent to the data center or the central monitoring system. The data concentrator is part of the modern AMI infrastructure (Automated Metering Infrastructure) and the backbone of industrial automation projects.

The versatile devices that can be mounted on a DIN rail have Ethernet, RS232, RS485 ports, digital inputs, Modbus RTU/Modbus TCP Gateway, Mbus or wireless M-Bus functions for industrial data collection and automation purposes. Data transmission can be done via an RS485 connection or the usage of the wireless mobile network. Even using a single router or data concentrator (DCU) is a very cost-effective solution for collecting data from industrial devices, energy meters (electricity, water, gas, sensors) or for monitoring devices.

These products are primarily intended for places that require high availability and for professional purposes – e.g. we recommend to use for members of production and industry, maintenance and service providers.

Our data concentrators can be connected to all kinds of industrial equipment. We offer customization of our products making it possible
for our clients to use them with a combination of IT and OT protocols.


Data concentrators (or DCUs) have an important role in a variety of Industrial Internet of Things (IIoT) applications. They collect and aggregate data from multiple industrial devices which can be sent to central management systems.

A data concentrator is the backbone of modern Automated Metering Infrastructures (or AMI) and industrial automation projects. Our multi-protocol data concentrator units (DCU) are capable of collecting data from industrial systems through RS485/ModBus RTU, Modbus TCP/IP, Mbus and wireless Mbus meters as well as from sensors through multiple I/O interfaces. Data transmission can be done by a wireless mobile network (LTE Cat.1 / Cat.M, Cat.NB). A single DCU + a router/modem can be a very cost-effective solution for monitoring up to 16 industrial devices (electricity/water/gas meters, sensors, etc. ).

Our data concentrators can be connected to all kinds of industrial equipment. We offer customization of our products making it possible for our clients to use them with a combination of IT and OT protocols.


Rugged cellular modems for Industrial IoT applications offering the latest, future-proof connectivity. These can be ordered with LTE Cat.1, Cat.M, Cat.NB module and is backwards compatible with EGPRS (2G). 

Offering an extremely long lifetime and easy deployment. It is the perfect upgrade for your existing 2G/3G modems.

Our industrial modems provide transparent RS485 Modbus communication, Modbus TCP, Mbus, Digital inputs and more for various industrial IoT applications like industrial automation, Scada/PLC communication, vending machines, smart metering, factory or building automation, and more.

These PLC connected external devices are ideal and cost-effective choices for an industrial system. It is the perfect solution for monitoring transparent or Modbus TCP/RTU communication, collect data and send data to the data center with transparent mode.

Our universal, independent, external modems can be attached to any RS485 MODBUS or Mbus devices externally.

We recommend these products for professional purposes that require high availability and realibility – as production, manufacturing, industrial services and maintenance!


Smart Metering Modems offer remote meter readout via LTE Cat.1, Cat.4, Cat.M / Cat.NB cellular networks – with 2G / 3G “fallback” feature. Upgrade your modem from 2G/3G to 4G LTE!

The heart of any remote meter reading solution is a modem that reads consumption data from the meters and sends it to a central server.

Our smart meter modems are designed specifically to be fully compatible with the electric meters of flagship manufacturers (Elster, Honeywell, Itron, Landis+Gyr, PME-PMI, SAPHIR, Ensor).

The hardware design and software satisfies the manufacturer’s requirements, the cases are designed to fit under the terminal covers, the power consumption of the modem is optimized for the specific meter etc. Smart electricity metering has never been so easy! Our modems can be integrated into any AMR/AMI solution easily.

WM System has supplied more than 500k modems to the biggest utilities around the world to support their smart grid initiatives. We offer modems for electricity and water metering.

Product customization is available for our clients. Need a special protocol or port? Contact us!

The shutdown of 3G and 2G networks has put many meters at risk of obsolescence due to outdated modems. The high cost of meter replacement can be avoided by upgrading to a 4G or Cat.M retrofit smart modem. Contact us for more information on how to keep your meters operational and upgrade to the latest technology. 


Consumption water and gas metering: Automated remote Meter Readout by Pulse signal counters and MBus data with LTE Cat.M and NB-IoT data transmitting capability

The heart of the remote and smart water meter reading solution is a data logger or modem that collects, counts the incoming Pulse signals, MBus data from the connected meters and sensors. The data logger transmits the consumption data via Cat.M or NB-IoT mobile network via MQTT to the Microsoft® Azure platform of the central server / HES.

Our smart water metering devices are designed specifically to be fully compatible with the Pulse- and MBus outputs of flagship manufacturers’ water meters.

The devices have battery powered long-life, independent operation with security features (TLS, etc.).

Smart water metering has never been so easy! Our devices can be integrated into any AMR/AMI solution.


The remote management and maintenance of an IIoT solution can be a real challenge.

Improve the network availability and operational efficiency of your fleet!


Remote Control Solutions for Public Street Lighting

The option to remotely control public lighting systems is extremely beneficial. Besides providing better lighting service to citizens, it allows operators to optimize maintenance and energy costs.

Our products allow the automated remote control of a public street lighting system by on-demand operation, scheduled switching, or manual control, On/Off power dimming, and sophisticated programming.

We offer products that, when installed inside the existing feeder pillar cabinets, can control street lights by controlling the supplied power to the street light power cable(s).  The lights can also be dimmed by lowering the supply voltage. The groups of street lights can be controlled according to reference light sensor(s), by clock and calendar, or manually through a management platform.

Operate the lighting system by remote relay control of the street lamps through the switching cabinet. Configure, manage, and monitor your lamps groups from the head-end (HES) center. Features include monitoring, supervision, and reports.


Load management is the process of controlling the demand for electricity in order to avoid overloading the grid.

In the context of public street light management, load management can be used to reduce the energy consumption of street lights by dimming them or turning them off during low-traffic hours. This can be done through the use of timers, sensors, or other automated systems.

Beyond just power measurement, there are now essential tools for power quality monitoring, control, scheduling analysis, and the security monitoring. Most electricity meters do not contain switchable relays or do not support remote switching.

Protect your investment! No need to change the currently used meters.

Adding a feature to smart meters which allows the utility and DSO to remotely turn connected devices on/off is a cost effective way to deal with this challenge.

Grid management can also be used to integrate solar farms into the grid. Solar farms generate electricity during the day, when demand is typically lower. By managing the load on the grid, utilities can ensure that solar power is used efficiently and that the grid remains stable.

Load control programs are a type of load management that is implemented by utilities. These programs allow utilities to control the electricity consumption of certain customers during peak demand hours. This can be done by offering financial incentives to customers who agree to reduce their electricity use, or by remotely controlling appliances or devices.

Load management is an important tool for reducing energy consumption and improving the reliability of the power grid. It is a key part of the transition to a clean energy future.

You can extend your Smart Metering Infrastructure with IoT Switched for a complete Grid Management.

Here are some specific examples of grid management programs for utilities and DSOs:

  • Public street light management: In many cities, street lights are dimmed or turned off during the early morning and late evening hours when traffic is low. This can save a significant amount of energy.
  • Solar farms: Utilities can use load management to ensure that solar power is used efficiently and that the grid remains stable. For example, utilities may dim street lights or turn them off during the day when solar power is abundant.
  • Load control: Utilities may offer financial incentives to customers who agree to reduce their electricity use during peak demand hours. For example, a utility may offer a rebate to customers who agree to turn off their air conditioners during the hottest hours of the day.


Wireless transmitter for Security Alarms, Router for Video surveillance

The speed and reliability of alarm signal transmission are critical for security systems.

Our cellular alarm communicator uses the GSM/GPRS (2G) or 3G / 4G LTE networks to send alarm signals to dispatch centers. There is universal compatibility with millions of wired and wireless alarm panels.

Upgrade the communication of your customer’s legacy security system’s to the latest cellular technology without having to change only the signal transmitters, while keeping all other components.

The two inputs of our device can be used for security system monitoring and sabotage detection (wire cut). In case of status changes, our device generates immediate alarms and quickly transmits the signals – in standard Contact ID format (CID codes) or via SIA DC-09 protocol – through the mobile network to the IP address of the dispatching center. Periodical life signals are provided at the configured intervals. Safety features, input monitoring, remote control, gate opening, IO expansion.

Our routers are widely used by industry professionals to connect IP cameras, NVRs (network video recorders), and DVRs (digital video recorders).


Product accessories, antenna and expansions

You can select and order accessories to your devices.

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