Develops and distributes IoT adapters (gPlug) for reading out Swiss smart meter customer interfaces
Gantrisch Energie AG
Schwarzenburg, SwitzerlandNew on Amplifa
About gPlug
Gantrisch Energie AG (GEAG), based in Schwarzenburg, develops and distributes low-cost IoT adapters under the gPlug brand for the customer interfaces (CII/P1-DSMR, HAN) of smart meters installed in Switzerland. The adapters (gPlugD, gPlugD-E, gPlugK, gPlugM) are based on the ESP32-C3 microcontroller and the open-source firmware Tasmota; the electronic circuit boards are developed as an in-house board design at GEAG. The read-out energy data is integrated into the local network via WiFi or Ethernet, displayed on a locally generated web page, and passed via HTTP or MQTT to smart home systems such as Home Assistant, ioBroker, openHAB or Loxone. In addition to the hardware products, the company offers firmware scripts, installation aids and technical support for selection and commissioning. Sales are conducted through its own webshop; an adapter for the Landis+Gyr E450 smart meter is in development. The compatibility of the products with various Swiss smart meter models has been tested and documented.
- Site
- Schwarzenburg
- Processes
- Development and sales of IoT adapters (gPlugD, gPlugD-E, gPlugK, gPlugM) for smart meters, Firmware development and configuration (Tasmota, amsReader, Berry scripts, meter metrics), Data read-out via the P1-DSMR customer interface incl. HDLC/DLMS decoding, Technical support in selecting and commissioning gPlug products, Provision of scripts/installation aids for commissioning
- Materials
- ESP32-C3 microcontroller, Tasmota firmware (open source), P1-DSMR customer interface (CII), Kamstrup HAN/CII interface, MQTT, HTTP, TLS protocols
- Certificates
- Compatibility testing with smart meters, OTA firmware updates, ISO 9001
- Industries
- IoT / Smart Metering, Smart Home / Home Automation, Energy Data Management
- 01
Definition of product requirements
- 02
Hardware/board design @ GEAG
- 03
Firmware development and script configuration (Tasmota, amsReader)
- 04
Compatibility testing with Swiss smart meters
- 05
Sales via webshop
- 06
Provision of installation aids and technical support
Development & Firmware
ESP32-C3 microcontroller
Powerful microcontroller of the current gPlug generations for WiFi and Ethernet variants.
Tasmota firmware (open source)
Specifically configured Tasmota firmware with script interpreter and meter metrics for adaptation to various CII variants.
P1-DSMR customer interface (CII)
Standard customer interface of Swiss smart meters incl. HDLC/DLMS decoding, used to read out energy data.
Kamstrup HAN/CII interface
Customer interface of the Kamstrup Omnipower smart meters, read out by the gPlugK via DLMS push 1.
MQTT, HTTP, TLS protocols
Interfaces for publishing energy data to smart home systems and cloud platforms incl. TLS encryption.
Location
Schwarzenburg
CHHeadquarters, development and sales
- Webshop
- Firmware development
- Compatibility testing
Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Development and sales of IoT adapters (gPlugD, gPlugD-E, gPlugK, gPlugM) for smart metersEngineering | – | – | – | – | – |
| Firmware development and configuration (Tasmota, amsReader, Berry scripts, meter metrics)Engineering | – | – | – | – | – |
| Data read-out via the P1-DSMR customer interface incl. HDLC/DLMS decodingEngineering | – | – | – | – | – |
Additional services
Reference customers
Quality & Compatibility Testing
The compatibility of the gPlug products with the smart meter models used in Switzerland and their customer interfaces was verified through in-house tests and documented. Suitable scripts for known HDLC/DLMS data format variants are included with the installation aids.
| Evidence | Schwarzenburg |
|---|---|
| Compatibility testing with smart meters | |
| OTA firmware updates | |
| ISO 9001 |
History
- 2022
Creation of the website and publication of the gPlug brand (December 2022).
- 2023
Launch of the first gPlugK for Kamstrup Omnipower smart meters.
- 2024
Launch of the gPlugD in the webshop (June 2024) with a more powerful microcontroller and included housing; introduction of gPlugK hardware version 2.2 (May 2024).
- 2025
Testing of the gPlugD/gPlugD-E with NES Gen-5 smart meters (configured P1-DSMR compatible, Primeo).