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CC2541 network connection

vinod s
Intellectual 260 points

Other Parts Discussed in Thread: CC2541, CC2541S

Hi,

   I have an application in which two low power wireless should connect each other and one of them should connect with a mobile phone with BLE. So is it possible to use two cc2541 for this purpose?

  • 0
    TI__Expert 4565 points

    It is possible to use two cc2541s for this. Your phone will be a central device so it will connect with one of the cc2541s that must act as a peripheral.

    For the connection between the two cc2541s, set the remaining cc2541 as a central and then it can communicate with that same peripheral device similar to the phone.

    There are some drawbacks to this like you will not be able to connect to both devices via the phone and the peripheral device in the middle will not be able to be connected to both the phone and other cc2541 simultaneously (the BLE spec doesn't allow the slave to have mult. connections).

    -Matt

  • 0 in reply to _mk
    Guru 22270 points

    Just to add a further note, iOS devices can act as peripherals while Android (at least the latest release KitKat 4.4) does not support the peripheral role.  If you are using iOS then you could have one CC2541 as central and the iOS and other CC2541 as peripherals.

    Thanks,

  • 0 in reply to Greenja
    Intellectual 260 points

    So right now I can do only one thing, I need to keep the android as central device and the two cc2541 as peripheral devices so that I can establish connection from android to two devices at a time. 

    Am I right?

  • 0 in reply to vinod s
    TI__Expert 4565 points

    Yep, this topology is definitely possible with BLE and the cc2541s. For a starting point on android development you can check out the sensor tag app. It looks like it was taken down temporarily from the website but there is another post with a link to source http://e2e.ti.com/support/wireless_connectivity/f/538/t/354344.aspx

    -Matt