Wireless M-Bus Stack

Physical and Data Link Layer

stzedn has developed a protocol stack, which conforms to Wireless M-Bus specification (EN 13757-4). All in this norm specified modes are available:

Mode	Communication	Description
S1	Unidirectional	In the Stationary mode, the metering devices send their data several times a day. In this mode, the data collector may save power as the metering devices send a wakeup signal before transmitting their data.
S1-m	Unidirectional	Same as S1, but the data collector must not enter low-power mode.
S2	Bidirectional	Bidirectional version of S1.
T1	Unidirectional	In the Frequent Transmit mode, the metering devices periodically send their data to collectors in range. The interval is configurable in terms of several seconds or minutes.
T2	Bidirectional	Bidirectional version of T1. The data collector may request dedicated data from the metering devices.
R2	Bidirectional	The Frequent Receive mode permits multiple metering devices not to interfere due to frequency multiplexing.

Based on the lower layer protocol, an application layer is implemented, which is compliant to EN 13757-3.

Further extensions to this application layer are available:

This specifications extend the application layer with