LTE-M Communication Module for AMI Energy Meters

As part of a national AMI rollout in the Czech Republic, PySENSE developed a dedicated LTE-M and NB-IoT communication module for energy meters provided by ZPA Smart Energy, a major European smart metering company.

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One of the core project requirements was support for cellular IoT protocols (LTE-M and NB-IoT) and full implementation of the DLMS Security Suite 2, enabling the use of Public Key Infrastructure (PKI) to secure all aspects of communication, authentication, and authorization—both with the Head-End System (HES) and with utility personnel.

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Built on PySENSE’s modular RTOS platform, the solution is fully integrated with ZPA’s AMx75 meter family, providing native communication and configuration exclusively via the DLMS/COSEM protocol, without any additional management interfaces. This ensures a clean, secure, and standardized approach to remote management.

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An integrated supercapacitor enables the sending of Last Gasp messages—critical alerts triggered during unexpected power outages—and protects the system’s internal power supply from sudden voltage drops.

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Thanks to close collaboration with ZPA Smart Energy, we delivered a cutting-edge smart metering solution that combines cellular IoT communication with advanced security mechanisms—including full DLMS Security Suite 2 support. This type of integration remains a rare achievement on the global market, offering both performance and compliance with the highest security standards.

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