• Pow-U


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HAN-port reader for M-bus power meters

Used on two categories power meters:

  1. Power meters in Norway and Sweden with HAN-NVE interface (RJ45 connector; same as for Ethernet).
  2. Power meters in other countries that delivers M-bus signal to an RJ12 connector. If in doubt, consult your grid company or email us before placing order.

For Kamstrup Omnipower meters, Pow-K is a better and less expensive solution.

Order without 3D printed holder if you prefer to 3D print enclosure yourself.

Enclosure: With
Cable: RJ45, 15 cm

Technical specifications

Compatibility Meters with M-bus signal
Connection Wi-Fi 2.4GHz b/g/n
Power Powered from the meter
Input voltage M-bus up to 36V
Operating power 0,5 W
Data encryption Supported
MQTT Yes, also SSL
Home Assistant autodiscovery Yes
Dimensions 70 x 39 x 24 mm
Weight (incl enclosure) 40 g
Operating conditions IP20 (not waterproof)
Temperature range -20°C to +70°C
Humidity Non-condensing

Verified to work on Aidon, Kaifa/Nuri, Kamstrup Omnipower with HAN-NVE module (could be necessary to power device via USB), Landis & Gyr (some models), Sagemcom.


  • Embedded powerful ESP32 micro controller
  • Integrates with smart home systems via MQTT
  • Home Assistant auto-discovery
  • No cloud server, you control of your data
  • Embedded RJ-45 connector
  • CE marked, the EU declaration of conformity can be downloaded from here.

Delivered with latest version amsreader-firmware.

Connects to your local wifi, where it displays a web user interface page that can be opened from a device (PC, tablet, phone, ...) connected your internal Wi-Fi network.

If you chose an option without enclosure, you can 3D-print the enclosure yourself from downloadable STL files.

Enclosure designed by Øyvind Kaurstad, you can find more of his 3D-designs here: https://cults3d.com/en/users/mroek/creations
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