The configurable NB-IoT/LTE-M/LoRaWAN device for non-invasive AC and DC current measurements operated from battery or mains and battery backup.

The CHESTER Current catalog application allows to meassure current consumption of machines non-invasively with up to 4 external current probes ranging from 1A up to 1000A.

Showcase of CHESTER Current catalog application. It shows a possible placement by solar panels and a dashboard showing the measured values
4 input channels
on one device

You can connect up to four probes to a single CHESTER device for indirect AC and DC measurements.

Measurement range
for application needs

Connect current probes with the maximum current range to suit your project (0-10A, 0-50A, 0-100A, 0-300A or 0-1000A).

wireless connectivity

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

Fast deployment and
seamless integration

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

Application areas

Typical use cases

CHESTER Current can be seamlessly integrated into renewable energy  platforms to send reports of equipment failure from afar.

The immense utility of the device also provides the means for the monitoring of manufacturing machines efficiency.

With CHESTER Current, you can obtain the Overall Equipment Efficiency (OEE) of your production line, and see machine utilization.

Among other applications, our device facilitates predictive maintenance by detecting in advance when machines require servicing.


Product overview

Enclosed CHESTER Current in the standart variant with two current probes connected

Application elasticity

One modular device covering a wide spectrum of IoT projects.

Enclosed CHESTER Current in the standart variant with two current probes connected

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

Open CHESTER case showing the internals with the CHESTER mainboard and expansion module CHESTER Z that allows external power suply

Max. number of current sensors


Power supply method

Battery, or main + backup battery

Open CHESTER case showing the internals with the CHESTER mainboard and expansion module CHESTER Z that allows external power suply

Nominal battery voltage

3.6 V

Nominal battery capacity

7 700 mAh

Nominal backup battery voltage

3.7 V

Nominal backup battery capacity

3 350 mAh

Operating voltage range

2.0 V to 5.0 V

Idle power consumption

< 180 μA

Peak power consumption

< 250 mA

Operating temperature range

-30 to +70 °C

Storage temperature range

-40 to +85 °C


130×175×45 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