• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 52 subscribers
  • Views 302 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.

Data feed question

Jesper Hoff
Intellectual 390 points

Other Parts Discussed in Thread: CC2540

Hello.

I am trying to send a constant feed of accelerometer readings. The way I do this, is by parsing accel. data into a modified simpleGattprofile, and doing a Read Using Characteristic UUID, then getting as much data as I can fit into an ATT_ReadByTypeRsp data package.

However, this doesn't seem to be fast enough; is there a way to do this faster?

Is it possible to set up the CC2540 to send a constant stream of data at fixed intervals, and if so, how?

Also, I see a lot of mentions of the UART, but is that what I need to get a hold on?

Thanks in advance :)

  • 0
    TI__Mastermind 23440 points

    Hi Jesper,

    Sending via GATT_Notification would be faster, as it is unidirectional whereas ReadReq and ReadRsp necessarily take two connection events.

    You can send up to 4 notifications containing 20 bytes each on every connection interval. You can then try to decrease the connection interval, but note that some time is needed for processing.

    Best regards,
    Aslak 

  • 0 in reply to Aslak N.
    Intellectual 390 points

    Thank you :) I used it earlier, but apparently at a place that was only called once, thus I never understood why it wasnt called more than once, but moving the call to the accelerometer processevent fixed it :)