M-Bus (Meter-Bus) is dedicated to reading meters — energy, water, gas, heat. It comes in two variants: wired M-Bus, on a dedicated 2-wire bus, and wireless M-Bus (wM-Bus), over radio in the 868 MHz band.
Wired or wireless M-Bus?
Two ways to read your meters — which one for which project.
M-Bus, for metering
Side by side
| Wired M-Bus | Wireless M-Bus | |
|---|---|---|
| Medium | Dedicated 2-wire bus | 868 MHz radio |
| Power | from the bus | battery (long life) |
| Install | cabling required | no wiring |
| Range | up to ~1000 m | radio (environment dependent) |
| Modes | — | T, C, S (meter dependent) |
| Best for | new builds, accessible meters | retrofit, scattered meters |
Which to choose
In new builds with accessible meters, wired M-Bus is reliable and bus-powered. In retrofits, or when meters are scattered or hard to reach, wireless avoids pulling cables. The WBox gateway reads both via the M-Bus driver (a wM-Bus USB adapter is required for wireless), then pushes the readings to the cloud — see M-Bus metering to the cloud.
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