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CCS/CC3200: Bluetooth 4.0 with CC3200

Abhijit Kamble
Intellectual 365 points
Part Number: CC3200
Other Parts Discussed in Thread: CC2541

Tool/software: Code Composer Studio

Hi,

I am trying to connect a Bluetooth 4.0 module(AT-09) with CC3200. For this, I tried the UART demo example code from CC3200 SDK. I am using BLE terminal android app for seeing the output. I am not getting anything there. On At-09 there are only VCC, GND, Rx, Tx and State pins are available. Is there something that I am missing. Please guide.

Regards,

Abhijit

  • 0
    TI__Mastermind 45206 points

    Hi Abhijit,

    Maybe check the baud rate that your Bluetooth device uses and make sure it matches that which is set in your code. The example you pulled defaults to a 115200 Baud rate.

    Hope this helps,
    Kevin

  • 0 in reply to Kevin Allen18
    Intellectual 365 points
    Hi Kevin,

    Thank you very much for your reply.
    I checked baud rate and adjusted as per the example code(115200). But still no improvement . Then I tried to see the change in voltage on Tx and Rx pin. I connected Tx pin to osciloscope and similarly Rx pin also. I was sending data and on consol I can see that I am receiving the data back but there is no change in voltage level on any pin(Tx, Rx). This is a bit odd, then I did the same experiment with Arduino uno, there I saw change in voltage on Tx and Rx pin. Can you please explain me why this is happening, why there is no change in voltage on Tx and Rx pin while data transmission and receiving is happening properly.

    Regards,
    Abhijit
  • 0 in reply to Abhijit Kamble
    TI__Mastermind 45206 points
    Hi Abhijit,

    I'm sorry I haven't been able to provide more help on this. The AT-09 module looks like it uses the CC2541.

    The technical documents on the product page may provide you some guidance on correctly communicating with the device:

    www.ti.com/.../technicaldocuments

    The datasheet or user's guides would probably be a good place to start.

    Hope this helps,
    Kevin