The configurable NB-IoT/LTE-M/LoRaWAN device for monitoring heat, gas, electricity, and water consumption in houses and apartments. Powered from mains or by battery with a battery lifespan up to 10 years.

The CHESTER wM-Bus catalog application uses a wireless gateway designed to communicate with energy meters using the Wireless M-Bus protocol and listens to configured wM-Bus T1 and C1 devices at precise intervals to aggregate received wM-Bus packets and transmit them over the NB-IoT/LTE-M network.

Battery-friendly wireless connectivity

The device transfers data over cellular networks (NB-IoT / LTE-M).

Configured wM-Bus sensors reading

CHESTER wM-Bus listens for configured wM-Bus T1 and C1 devices, aggregates the raw received packets and send them to cloud.

10+ years of battery lifespan

From two Saft LSH 20 cells (size D), the device can run for a long time with one reading per week.

Fast deployment and seamless integration

Use the HARDWARIO Manager iOS/Android app to set the device and integrate its data from HARDWARIO Cloud.

Application areas

Typical use cases

Thanks to the inovative desing of CHESTER wM-Bus you wil be able to easily monitor gas, heat, electricity and water consumption in apartment buildings and homes.

In addition, CHESTER wM-Bus can also help to measure apartment building energy bills accurately and precisely.

To avoid any gas leaks or backflow of water, CHESTER wM-Bus will continuously monitor any anomalies and report them back.


Product overview


Application elasticity

One modular device covering a wide spectrum of IoT projects.


Open source SDK

Ability to create your applications or update the existing ones.

LPWAN connectivity

Communication to the internet from the most distant places.

Low-power design

Reliable operation from a primary cell battery for several years.

IP 67 protection level

Enclosure to withstand harsh environmental conditions.

Custom branding

Full OEM branding service, including custom color printing.

Bluetooth Low Energy

For diagnostics, parametrization, and device firmware upgrades.

Truly configurable device

One CHESTER for so many configurations

The CHESTER platform goes way beyond one specific application use case. The system design, integrated hardware technologies, firmware architecture, and the ecosystem of tools - all of this scales well to a wide range of applications - from Industry 4.0, smart city, e-metering, and environmental monitoring to some very special verticals such as digital retail and agriculture.

CHESTER Mainboard without the case with many point showing each part of the board

Technical specifications

Top photo of CHESTER wM-Bus with open coverTop photo of CHESTER wM-Bus with open cover

Power options

Primary cells / Power adapter

Nominal battery voltage

3.6 V

Nominal battery capacity

26 000 mAh

Operating voltage range

2.0 V to 5.0 V

Idle power consumption

< 180 μA

Peak power consumption

< 300 mA

Operating temperature range

-20 to +60 °C

Storage temperature range

-20 to +60 °C


200×280×85 mm


Easy setup and configuration

Our catalog applications are made to be setup simply and quickly. After you choose your application and get your package, just install CHESTER in the desired location, register it to our cloud and you will get the data to your dashboard that is created based on the selected application.

Example dashboard for catalog application
Simple three step flow showing how easy is it to setup and operate CHESTER
The right choice


Choose one of the catalog applications for immediate deployment, or contact us with your specific needs. Get in touch with us to learn more and build IoT projects for your customers today, together.

CHESTER ecosystem, showing all the extensions, expansion boards, enclosures and external sensors

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