• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 40 subscribers
  • Views 321 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC3120MOD: Maximum rate using AT Command for CC3120

CWJCWJCWJ
Intellectual 260 points

Part Number: CC3120MOD
Other Parts Discussed in Thread: CC3120

I have a FPGA and would like to add WiFi connectivity to it. I'm planning to use AT command way as an interface between FPGA and CC3120.

What's the maximum transfer rate that I can achieve using either UART or SPI? I would like to have about 2MBytes WiFi upload speed from FPGA to internet.

Thank you very much.

  • 0
    TI__Guru 63006 points

    AT Command are not supported by CC3120 (only CC32xx supports AT commands through a dedicated MCU application).

    Using the host driver over SPI (and assuming 20MHz SPI clock), the maximum Application Throughput is  UDP: 16 Mbps – TCP: 13 Mbps. This number can be achieved in optimal conditions (within an RF chamber and not in a real open air).

    As you can see, it will be very hard to maintain a 2MBps (=16MBps) connection .

    UART is limited to baud rate of 3M and is not relevant for this use-case.

    Depending on your host, you may want to check the Wilink device (https://www.ti.com/product/WL1837MOD) which is capable of higher bandwidth (but note that currently, it is mostly integrated with MPUs running Linux).

    Br,

    Kobi

  • 0 in reply to Kobi Leibovitch
    Intellectual 260 points

    Thanks for your reply. Based on my understanding, CC32xx has an integrated application MCU so it supports AT commands while CC31xx doesn't have. Am I correct?

    Which way would you recommend cause I am using FPGA and no way to port the host driver which is in C code? Is AT commands way let me do both HTTP and MQTT stuff?

    Thank you once again!

  • 0 in reply to CWJCWJCWJ
    TI__Guru 63006 points

    You are correct about cc32xx.

    The AT Commands is an option that will enable you to use both HTTP and MQTT clients (see https://www.ti.com/lit/pdf/swru534).

    Br,

    Kobi