Cellular modem for Iskra MT830, MT831 electricity meters
All around the world mobile operators are shutting down 2G/3G networks in order to give way to 5G. Companies that operate smart meters with 2G/3G connectivity must plan the migration to the latest 4G LTE network which is well-positioned to dominate smart metering communication technologies in the upcoming years. The migration to LTE has many advantages, for example, a shorter readout time due to the high-speed network with low latency.
Utilities have two options for migration: replace the meters or upgrade the modems! The 1st option comes with a high CAPEX, while the 2nd option is a future-proof solution that reduces TCO.
Our company develops cellular modems that work smoothly and are fully compatible with the different models of electricity meters.
These devices were designed to fit under the terminal cover of the meter and are compliant with the Iskra standards.
Our cellular modems represent a future-proof migration solution to the LTE network with the same functionality, on higher data speed. Configuration and firmware updates can be done remotely, minimizing the need for costly site visits.
| Device type | Smart electricity metering cellular modem |
|---|---|
| Primary use case | Smart metering (AMI/AMR), Smart Grid, LTE and Cat.M upgrade of legacy meters |
| Cellular & RF Access Technology | LTE Cat.1/2G, CSD; LTE Cat.M/NB with 450 MHz and 2G option |
| Protocols | IEC Transparent, TCP |
| Interfaces, Physical Connectors | RS232 (D-SUB9 or 2-wire), RS485 (2-wire or 4-wire) |
| Meter compatibility | ISKRA MT830, MT831 type electricity meters |
| Power & Environment | AC power from the meter — between -40 Celsius and +70 Celsius degree, IP51 protection |
| Approvals & Certifications | CE, RoHS, ReD DA |
| Firmware | Customized Free RToS (embedded system) |
| Installation | Fit under the terminal cover of the meter |
| Configuration | WM-E Term configuration software (downloadable) via local or TCP |
| Device Management | Device Manager software (Remote provisioning, firmware update, bulk config) |
| Security | TLS, Super capacitor (LastGASP notification) option, Surge protection |
Cellular communication modem that has been designed specifically for the automatized remote readout of Iskra® MT830, MT831 electricity meters.
You can save money by using our modem because furthermore there is no need for manual readout of the meter systems.
This modem is connectable through its RS232 and RS485 connection, it provides transparent data link to the HES, through the cellular LTE network.
Our modem forms part of the AMI (Advanced Metering Infrastructure) of the utility company.
The modem can be used to remotely read the meter’s registers, consumption data of the electricity meters and modify modem parameters.
The readout takes place in „PULL” mode, the modem provides transparent communication between the meter and the electricity provider’s HES center.
The modem can be installed under the terminal cover of the meter sealed by the service provider.
The modem is configurable with the WM-E Term® software and remotely manageable with the Device Manager® software (order option).
Product Datasheet
Updated: 2026-03-27
Quick Reference Guide
Updated: 2025-12-03
Installation Manual
Updated: 2025-12-03
WM-E Term User Manual
Updated: 2026-01-19
WM-E1S ISKRA Parameter Description
Updated: 2025-02-05
WM-E Term Appendix
Updated: 2025-01-22
WM-E Term configuration tool
Updated: 2026-01-19
WM-E1S sample configuration file for WM-E Term (compressed ZIP file, extract the CFG file)
Updated: 2023-11-27
Video tutorial – Chapter 1. WM-E Term: Introduction
Video tutorial – Chapter 2. WM-E Term: How to Create a log file from the connected modem?
Video tutorial – Chapter 3. WM-E Term: Serial port connection settings
Video tutorial – Chapter 4. WM-E Term: Debug redirection
Video tutorial – Chapter 5. WM-E Term: How to change the Display Language?
Video tutorial – Chapter 6. WM-E Term: Use Log Files in WM-E Term (Tutorial video)
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