Decoding secondary address and M-Bus serial number

Each M-Bus meter has a unique secondary address. The secondary address of a meter includes 4 parts: serial number, M-Bus firmware version, medium, and manufacturer.

The format of the secondary address is SSSSSSSSMAVVME. The decoding of the secondary address is given below:

SSSSSSSS: Serial Number

MA: Manufacturer

VV: M-Bus Firmware Version

ME: Medium

Common Medium list:

01 = Oil

02 = Electricity

03 = Gas

04 = Heat

The main board serial number format is YYWWDNNN. The decoding of the M-Bus serial number is given below followed with an example:

YY: Year

WW: Week

D: Day

NNN: Number

The following example distinguishes the M-Bus serial number for iEM3135 / iEM3235 / iEM3335 meters.

Main Board SN	M-Bus SN
Main Board SN	iEM3135	iEM3235	iEM3335