Reader for smart energy meters with M-bus. External power normally not needed.

Pow-U for M-bus meters



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Stock available: 67
Home automation

Delivered assembled, tested and programmed with latest versjon firmware AmsToMqttBridge.

Based on ESP8266 wifi-module.

After first configuration which connects the unit to your local wifi, the web user interface can be opened on your internal network from a connected PC, tablet or phone. No cloud service, no data is sent outside of your home network.

Connects to your smarthome system via MQTT. MQTT setup for direct integration with Home Assistant MQTT is included in the firmware.

Documentation: See the tab "Vedlegg" on the linked page. Note that documentation is for the moment partly in Norwegian; will be translated when I find time.

Note: 3D printed enclosure not included, must be ordered separately (see Extras) - or you can slef-print enclosure from provided STL files, see "Vedlegg" on linked page.

Links to code and documentation

Documentation (

Shipping policy

Time from order to shipping can vary from same days to weeks, depending on stock status. Please see availability indication per product listed in the store.

Product HS Code: 85437000
Here are some extras that might be useful for your project!
It is not recommended to use the board unprotected.
A short cable will keep your installation tidy.

The seller

Frei, Norway
57 orders since Apr 2, 2022
Solutions for reading smart power meters. Confirmed working on power meters in Norway, Sweden, Denmark - and some in Switzerland. Contact us before order to check status for other countries.
We're sorry for the exorbitant price of shipping with tracking, but this is due to the national postal service which does not yet have an acceptable "product" for shipment with both IOSS-number and tracking.
Norwegian customers are invited to order from