• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 52 subscribers
  • Views 214 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.

Time between disconnection and new connection

s.biehl
Prodigy 170 points

Other Parts Discussed in Thread: CC2540

Hi everybody,

I try to configure a central device to serially connect to several peripheral devices. Everytime a notification is sent from the peripheral to transmit a sensor value.

Between the link termination with GAPCentralRole_TerminateLink and a new connection request with GAPCentralRole_EstablishLink it lasts about 100ms to 150ms.

With the Packet Sniffer I count about 5 advertising packets between the termination und the connection request with an interval between 20 and 30 ms. The advertising interval is set to 20ms, which is, I believe, the shortest possible time.

Why is this so? Can I change any parameters to speed it up?

I Hope someone is able to help me.

Best Regards

Soenke

  • 0
    Prodigy 90 points

    Hi community,

    I measured the same time (100-150ms) between the connections (cc2540). The advertising interval is set to the minimum (20ms) and connection interval to 7,5ms.

    In the beginning my central discovers all reachable peripherals and creates a list. After that it connects every device (about 10) in a round robin process, to transmit new output informations. I expected a maximum time of about 60ms per Device. But in my first test with only three Peripherals, it took min. 520ms per round. With the packet sniffer I got the same result like Soenke: 100-150ms pause between the connections.

    Is there any explanation? If I can’t connect faster, I have to quit my BLE project.

    Soenke, did you solve the Problem?

    Best Regards

    Simon