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Which base protocols are available for custom RF protocol without module re-certification

Cor Jansen
Intellectual 675 points
Other Parts Discussed in Thread: SIMPLICITI, CC2500

Hi,

We want to develop hardware for wireless electronic musical instrument interfaces.
None of the existing protocols (like BLE, Zigbee, Thread etc) meet our requirements. So we want to make a custom protocol.
But it is beyond our reach to do a full RF certification for CE and FCC.

If we understand correctly it is possible to use pre-certified modules and build on top of one of the base protocols these modules are certified for. This way you can do a more simple CE and FCC certification test.

Which (certified) protocols can we use to build our custom protocol?
We would like a transfer rate higher then 250Kb/s. more like 1Mb/s or 2Mb/s. Is that possible for custom protocols?
Can we for instance use the lower layers of BLE for this (without the need of module re-certification)?

Can we use the SimpliciTI SDK to build our high speed protocol without the need for module re-certification of CE and FCC?

What exactly are our options?

  • 0
    TI__Mastermind 19188 points

    Hi Cor,

    If you want to target BLE, I would recommend you to look at the following module, as it is more recent: https://www.ti.com/product/CC2651R3SIPA

    This thread also gives you an insight into the to be expected transfer rates: https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/784780/cc2642r-ble-oad-throughput

    Regards,

    Arthur

  • 0
    TI__Mastermind 31540 points

    Hi,

    1. Regarding technology selection:
      1. A number of our devices, including CC2500, can be used to develop custom protocols. Is this a new project? If yes, I do recommend using some of our newer devices, as they will have the most up-to-date development flow.
      2. The available RF PHYs, including data rates, are listed in their datasheets. For CC2500, the max data rate is 500kbps.
      3. For 1Mbps datarate, we also have NESB PHY on CC2340 device. That one has auto-ack feature and address filtering, with datarate options of 1Mbps and 2Mbps.
    2. Regarding certification, I don't have as much experience here, but I tend to agree with you, that using modules should lower the certification barrier.
      1. Here is a video from TI that might help here: https://www.youtube.com/watch?v=YlDcWHRNw0U
      2. If you have more questions here, I can pass this post to a HW expert.

    Thanks,
    Toby

  • 0 in reply to Arthur R☑️
    Intellectual 675 points

    Actually we did not select a part yet. The CC2500 in the title was because we had to select a apart for the question. We would like to use some pre-certified module (maybe like the CC2651R3SIPA you mentioned).

    The question is if we can use BLE. As I said we need some features BLE does not have. Can we use the lower layers of the BLE protocol and add our own higher layers? This such that we do not have to re-certify the module?

  • 0 in reply to Toby
    Intellectual 675 points

    We did not select a part yet. The CC2500 in the title was because we had to select a apart for the question. We would like to use some pre-certified module. This will make CE and FCC certification of the product much easier as also indicated in the video you linked.

    My problem is this:

    When we create a complete new protocol (from the phy layer up) we need to do a complete RF module re-certification. But I think there are some base protocols that only specify the first two layers or so. The module may be pre-certified for these base protocols. If we understand correctly we do not have to do the module -re-certification if we build on top of such a base protocol.

    So which base protocols are available on to which we can build our custom protocol?
    And are there base protocols that have high transfer rates like 2Mb/s?
    Can we use the lower layer of BLE and build our own custom protocol on top of that while not need to re-certify the module?

    We can not find the answer to these questions.