Battery-powered Data Collector for wM-Bus T-/C-mode & DSSS-coded Data Packets @ 868.95MHz Ref Design


Design files


TIDC-DSSS868WMBUS-DC enables data collectors with optimized firmware for receiving wireless M-Bus (wM-Bus) packets in frequent transmission (T-) and compact (C-) modes at 868.95 MHz. For improved range, a customized direct sequence spread spectrum (DSSS)-coded packet reception is also supported. This reference design can be adapted for wM-Bus and DSSS-enabled data collectors and mobile readers at 169-MHz and 433-MHz bands.

  • Battery-powered data collector (or Mobile reader) for wM-Bus T- and C-mode or DSSS-coded data packets
  • 10 Vin ultra-low Iq DC/DC supports multiple battery types, configurations and chemistries.
  • Market leading blocking, selectivity and RX sensitivity in wM-Bus T-mode with +-12% data rate variation with 100 kcps @ 868.95 MHz for a robust wireless design
  • EN13757-4 T- and C-mode compliant "other" device with open source code examples for receive operation
  • 11-bits (and 16-bits) DSSS-coding of data supported in hardware
  • This ultra low-power, battery-operated data collector system is tested and includes open source licensed firmware. It also includes SRF7 studio GUI configuration files and user's guide and our sub-1 GHz transceiver, MSP430 microcontroller and ultra-low Iq step--down converter.
??image.gallery.download_en_US?? View video with transcript Video

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUA08A.PDF (2992 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

TPS627453.3V-10V input, 300mA Ultra Low Iq step-down converter with VSEL and input voltage switch

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F5438A25-MHz MCU with 256-KB flash, 16-KB SRAM, 12-bit ADC, DMA, UART/SPI/I2C, timer, HW multiplier

Data sheet: PDF | HTML
Sub-1 GHz transceivers

CC1125Ultra-high performance Sub-1 GHz wireless transceiver for narrowband systems

Data sheet: PDF | HTML

Start development


Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Design guide Data Collector for wM-Bus T-/C-Modes and DSSS-Coded Long-Range Mode Design Guide (Rev. A) May 26, 2017

Related design resources

Software development

WMBUS Wireless M-bus protocol software

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​