Wireless M-BUS (wMbus) is a radio technology for meters and sensors that operates in 433 MHz and 868 MHz with short range of 30 to 150m (depending of environment).
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For parsing wMbus telegrams you can use our wMbus Parsing API
M-Bus Telegram Structure
Storage number
The storage number does group value by points in time.
| Storage Number | When? |
|---|---|
| 0 | At time of reading |
| 1 .. n | Historic values, e.g. Monthly or Due Date Values |
There can be multiple value types inside a single storage number, typical values are:
| Value type | Examples | Meaning |
|---|---|---|
Date Time & Date | 31.12.2022 01.02.2023 23:55:00 | All values of the storage number relate to this time. |
| Meter value | Volume / Energy / Temperature / H.C.A. / etc. e.g. 20.4 °C | The value measured by the meter |
| Error Value | [0 1 0 0 0 0 0 0] | Ofen manufacturer specific error flags. Mostly used in storage number 0, but can also appear in others. |
| Any other | Some meters have other value types |
Encryption
Wireless M-Bus Telegrams are usually encrypted 
and must be decrypted 
using a 16-Bit key.
When received by the Lobaro Plattform, you can configure decryption keys that are applied up on reception (see: wMbus Keys).