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Best development kit for Wireless MBus (wmbus) - CC1120, CC1121 or CC1125

Joerg Deutschmann
Prodigy 20 points
Other Parts Discussed in Thread: WMBUS, CC1121, CC1125DK, CC1125

Dear all,

I had planned to buy an TI CC1120DK evaluation kit, but then I saw a post that says WMBus with mode T does not work on a CC1121
http://e2e.ti.com/support/low_power_rf/f/156/t/192727.aspx

Now I'm a little bit worried which development kit is the best, maybe even the CC1125DK? At least one should be able to implement all modes...
The kit should also be upgradable to the new 169MHz range at some point, that's why I prefer the new TrxEB.

Sorry I'm not very familiar with WMBus yet, hope to get an advice from some experienced coder...

Best regards
Joerg

  • 0
    Intellectual 350 points

    Hi Joerg,

    if you are looking for a field proven Wireless M-Bus solution, have a look at Radiocrafts RC1180-MBUS3 and RC1700HP-MBUS4. These are very compact pin-compatible modules for 868 and 169 MHz. They contain a complete Wireless M-Bus stack, not only the physical layer, but also all MAC layers, link layers, transport layers and application layers.

    The PHY support S, T, C mode at 868 MHz and all N modes at 169 MHz (500mW). In addition the modules provide full compliance to two-way timing, encryption (at APL and ELL), the new extended link layer, the new transport layers, and all the other new features specified in the new EN13757-4. The module has extensive support for two-way communication talking care of all time critical issues. 

    www.radiocrafts.com

     

  • 0 in reply to Peder Martin Evjen
    TI__Guru**** 317180 points

    If you are interested in WMBUS T mode you have to use CC1125 so the best would be to start with CC1125 if you need support for all modes

  • 0 in reply to TER
    Prodigy 20 points

    TER said:

    If you are interested in WMBUS T mode you have to use CC1125 so the best would be to start with CC1125 if you need support for all modes

    Thanks a lot for your answer, regarding the CC1125 I was slightly confused as it says "This kit is designed for the 869.2-869.25 MHz frequency band" on the CC1125DK website...

  • 0 in reply to Joerg Deutschmann
    TI__Guru**** 317180 points

    The CC1125 is designed for CAT1 and hence has a SAW filter in the recieve path to comply with this, hence the reduced frequency range. Hence the kit as is is not aimed for other frequencies but by bypassing the SAW filter you will have a solution that works in the entire 868MHz band.