WMBUS

Wireless M-Bus Protocol Software

WMBUS

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Overview

The Wireless M-Bus standard (EN13757-4:2014-2) specifies the RF communication link between water, gas, heat, and electric meters and the data collecting devices. It is widely accepted in Europe for smart metering or Advanced Metering Infrastructure (AMI) applications. Wireless M-Bus was originally targeted to operate in the 868 MHz band, which gives a good trade-off between RF range and antenna size and provides a link budget suitable for a Home Area Network range inside buildings. Two other ISM bands in Europe, 169MHz and 433MHz, were added later to the wM-Bus specification, introducing narrow-band solutions with significantly higher link budget and thus enabling longer range solutions such as Metropolitan Area Networks in dense populated cities.

What does TI provide to help designers?

Hardware platforms:

Software solutions:

  • wM-Bus stack – For customers who want to shorten their development cycle and develop metering products TI provides an OMSv4.1.2 compliant and field proven wM-Bus stack. This is a full SW solution, supporting the SimpleLink Sub-1 GHz and Dual-Band wireless MCUs. The stack is provided “free-of-charge” and royalty-free when used with CC1310 and CC1350.

NOTE: Multiple other TI hardware platforms, including the two-chip solution of the MSP430 + CC112x and CC120x high performance transceivers are also supported, specifically the 868 and 169 MHz bands.

Learn more about the two-chip solution>

For more information regarding the MSP43x + CC112x/CC12x0 CIG (Italian Gas meter requirements) compliant stack solution contact your TI sales representative.

Support for the wM-Bus stack is available from Stackforce GmbH. Services include stack customization and porting to hardware platforms beyond Texas Instruments’ reference design.

Please contact Stackforce here

Features
  • Uni-directional S1-,.T1- and C1-mode Meter configuration at 868 MHz
  • Bi-directional S2-, T2- and C2-mode Meter configuration at 868 MHz
  • Bi-directional S2-, T2- and C2-mode Data Collector configuration at 868 MHz
  • 115.2 kbps UART interface with Serial Command Interpreter (to external Host MCU)
  • API interface for integration of the wM-Bus Stack into own application
  • OMSv4.1.2 compatibility (an OMSv4.0.2 Stack version for backwards compatibility with installed devices in the field is available as well).
  • Ultra-low power in sleep (UART interface inactive for Meter devices)

  • Binary Meter images for TI wM-Bus stack for S1, S2 or T1_C1 and T2_C2 combined wM-Bus modes for OMSv4.1.2 for a Meter device
  • Binary Meter images for TI wM-Bus stack for S2 or T2 and C2 (C2_T2 combined) wM-Bus modes for OMSv4.1.2 for a Data Collector
  • CCS project configurations for “Serial” or Network processor function for each mode and either Meter or Data Collector
  • CCS project configurations for “Embedded” or “API” function for each S-, T and C-mode and either Meter or Data Collector
  • Extensive documentation of both Serial and API interfaces in HTML format

Downloads

Application software & framework

WMBUS Wireless M-Bus Protocol Software

Multi-protocol products
CC1350 SimpleLink™ 32-bit Arm Cortex-M3 multiprotocol Sub-1 GHz & 2.4 GHz wireless MCU with 128kB Flash
Sub-1 GHz products
CC1120 High performance Sub-1 GHz wireless transceiver for narrowband systems CC1310 SimpleLink™ 32-bit Arm Cortex-M3 Sub-1 GHz wireless MCU with 128kB Flash
Evaluation board
LAUNCHXL-CC1310 SimpleLink™ Sub-1 GHz CC1310 wireless MCU LaunchPad™ development kit
Development kit
LAUNCHXL-CC1350 SimpleLink™ Dual-Band CC1350 Wireless MCU LaunchPad Development Kit

Technical documentation

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Type Title Date
Application note Low-power wM-Bus Stack Implementation With CC1310 and CC1350 Oct. 19, 2018
Application note CC13xx wM-Bus S-Mode (Rev. A) Oct. 03, 2018
Application note CC13xx Combined wM-Bus C-Mode and T-Mode Application Note (Rev. E) Oct. 03, 2018
Technical articles European smart grid RF communication in Sub-1 GHz - part 3 Jul. 21, 2015
Technical articles European smart grid RF communication in Sub-1 GHz - part 1 Jun. 18, 2015
White paper Complete Wireless M-Bus Solution (Rev. B) Nov. 05, 2014
More literature European Smart Meters Demand wM-Bus at 169 MHz Oct. 02, 2013
Application note AN121 – Wireless M-Bus Implementation with CC112x/CC120x High Performance Transc Feb. 20, 2013
Application note DN040 -- Reduced Battery Current Using CC112x, CC1175_and CC1200 with TPS62730 Oct. 02, 2012
Application note DN039 -- IPC for 868/915 MHz operation with the CC112x, CC117x and CC12xx Aug. 20, 2012
Application note AN067 - Wireless MBUS Implementation with cc1101 and MSP430 (Rev. A) Nov. 06, 2008

Related design resources

Reference designs

REFERENCE DESIGN
CC112XSKY65367EM-RD CC112x SKY65367 EM 30 dBm 169 MHz Reference Design TIDA-00838 Heat Cost Allocator with wM-Bus at 868 MHz Reference Design TIDC-DSSS868WMBUS-DC Battery-powered Data Collector for wM-Bus T-/C-mode & DSSS-coded Data Packets @ 868.95MHz Ref Design TIDC-MULTIBAND-WMBUS Multiband (169, 433 and 868MHz) wM-Bus RF sub-system with Segmented LCD Reference Design TIDC-WMBUS-169MHZ ETSI Cat. 1 Receiver-Capable wM-Bus 169MHz RF Subsystem for Smart Gas and Water Meters TIDC-WMBUS-868MHZ ETSI Cat2 Receiver Capable wM-Bus 868 MHz RF Subsystem for Smart Utility Meter & Heat Cost Allocator

Support & training

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