SMA MBUS variant
For meters with an M-Bus socket and for meters that transmit wirelessly.
€150.00
incl. VAT
Go to shop
The customer interface, finally usable
Your meter data. Live. Local.
The Smart Meter Adapter reads your electricity meter’s customer interface and serves the readings to your home network second by second — via dashboard, JSON API, MQTT and Modbus TCP.
- Runs entirely locally
- Set up in minutes
- All common meters
Your data stays with you
The adapter is a bridge between your meter and your home network — not between your meter and a cloud.
No internet connection
The adapter never opens a connection to the internet on its own. It works exclusively inside your local network.
No stored readings
Consumption values are not stored on the device. What you do not fetch simply ceases to exist.
Decryption on the device
Data is decrypted inside the adapter. The meter key issued by your grid operator never leaves the device.
Running in three steps
No tools, no work on your electrical installation, no electrician needed.
1
Plug in
Connect the adapter to your meter’s customer interface with the supplied cable. DIN rail, wall or adhesive pad — it fits in any distribution board.
2
Set up
Join the adapter’s WiFi, follow the setup wizard and enter the meter key from your grid operator.
3
Read out
View the readings on the dashboard or pull them into your system via JSON API, MQTT and Modbus TCP.
Which variant do I need?
Pick your grid operator and meter model — the finder tells you the right variant and any accessories.
Three products, every meter
Two adapter variants cover every interface; the IR reading head extends them to optical meters.
SMA UART variant
For meters with a P1 socket and — together with the reading head — for optical meters.
€125.00
incl. VAT
Go to shop
IR reading head (IEC 62056-21)
IEC 62056-21 optical reading head, an accessory for the UART variant.
€52.00
incl. VAT
Go to shop
Four ways to your data
The adapter serves the same readings over four interfaces — take whichever fits your system.
Dashboard
Built-in web interface with a live chart for import, export and total.
JSON API
REST endpoints with OBIS codes and timestamps, protected by a token.
MQTT
The adapter publishes meter data as JSON to any topic on your broker.
Modbus TCP
SunSpec register layout — connects straight to inverters and building controls.
The technical summary
1 unit
DIN rail width
typ. 1 W
Power draw
−25…+75 °C
Ambient temperature
IP20
Protection class, indoor
Common questions
The essentials on choosing, installing and running the adapter.
What exactly does the Smart Meter Adapter do?
Your electricity meter has a so-called customer interface. Through it the meter hands out your consumption data — encrypted, and in a format no off-the-shelf device can do anything with.
The Smart Meter Adapter plugs into that interface, decrypts the data on the device and serves it on your WiFi: as a dashboard in the browser, as a JSON API, over MQTT and via Modbus TCP.
Which readings do I get?
By default the four central figures as OBIS values:
1-0:1.8.0— active energy import, meter reading1-0:2.8.0— active energy export, meter reading1-0:1.7.0— instantaneous active power, import1-0:2.7.0— instantaneous active power, export
Over Modbus TCP further values are available depending on the meter, such as the current on each individual phase.
Important: which values actually arrive depends on the meter type and the grid operator. Only the data the meter actually emits is populated.
Does my consumption data go to a cloud?
No. The adapter never opens a connection to the internet on its own. It works exclusively inside your local network, and decryption happens on the device itself.
If you want to send the data to an external service you have to set that up deliberately — for example by pointing the MQTT client at a broker on the internet.
Does the adapter store my consumption readings?
No. No consumption values are stored on the device. The adapter passes readings through — whatever you do not fetch or record yourself is gone.
For a history you need a system that receives and stores the values, for instance a database behind your MQTT broker.
How many devices can access it at the same time?
A maximum of three concurrent connections. If further clients want access, a new login is required.
If you need the data in many places, MQTT is the better route: the adapter pushes readings to your broker, and any number of clients subscribe to the broker rather than to the adapter.
Ready for your own meter data?
Find out in under a minute which variant fits your meter.