• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 52 subscribers
  • Views 688 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.

Notification per ConnHandle

Oliver Fueckert
Prodigy 50 points

Other Parts Discussed in Thread: CC2540

Hi,

My simplePeripheral allows for multiple concurrent Central connection.

Now when when one of the Centrals (IOS devices) writes a "Command" characteristic, the application processes the received Value and is supposed to respond back to the Central with a Central specific Notification.

However, is there a way to send a notification back _only_  to the Central that initiated the write rather than to all Centrals that have notifications on that Characteristic enabled ?

Any other suggestions on alternative implementation for a connHandle specific write/response functionality would be greatly appreciated as well!

best regards,

Oliver.

  • 0
    TI__Guru 57865 points

    Hi Oliver,

    It is not possible for a peripheral device to be connected to multiple central devices so I do not really understand your question. Anyway, looking at the client/server perspective (independent of GAP roles Peripheral/Central) you have certain rules to follow. In order to send a notification back as a response to a notification, you would have to have a server on the each side of the communication (and essentially a client on each side). Note that the notification uses the connection handle to relay to correct client device.

    Maybe I am misunderstanding you. Could you explain the use case in more detail?

    Best Regards

  • 0 in reply to J Lindh
    Prodigy 50 points

    Hi Nick,

    Thank you for taking the time to respond. I had worked on the single user application first which works fine and then wanted to extend it for multiple phones to control the BLE device. I guess I should have read the standards more carefully to start with.

    So I guess the only way to make this use case work (Multiple Phones communicating with the CC2540 simultaneously) I will have to refactor the firmware code to use the Central role profile. And then make the phones a Peripheral. If I understand the stack docs correctly This would allow for max 3 concurrent devices?

    best regards,

    Oliver.

      

  • 0 in reply to Oliver Fueckert
    TI__Guru 57865 points

    Hi Oliver,

    Oliver Fueckert said:
    So I guess the only way to make this use case work (Multiple Phones communicating with the CC2540 simultaneously) I will have to refactor the firmware code to use the Central role profile. And then make the phones a Peripheral. If I understand the stack docs correctly This would allow for max 3 concurrent devices

    Correct, you can look at the simpleBLECentral example project. 

    Best Regards