Hi, I tested Bluetooth connection with the Boilerplate firmware. It seems that when the Shimmer leaves the line-of-sight of the PC, it doesn't close the BT connection. Because when it moves back, it just continues streaming again. So detecting whether the connection has been closed completely isn't the best way to go I think.
802.15.4 seems a bit vague in my opinion. Where can I find the right information on how to implement this protocol? Thanks 2012/5/15 mike healy <[email protected]> > Hi, > > An easier way to determine if the Shimmer has lost the BT connection is to > use Bluetooth.connectionClosed() event. In this event you can just post a > task to do whatever you want (such as logging to SD). > > Equally you can use Bluetooth.connectionMade() event to tell when a BT > connection is re-established. > > You will, however, need to do a bit more work on the host (PC) side to (a) > realise when the BT connection is lost and (b) re-establish the connection > when the Shimmer comes back in range (i.e. when the connection is lost you > will need to periodically scan and when the shimmer is detected again > establish a new connection). > > The 802.15.4 radio is more suitable for the type of scheme you describe > (as it is connectionless, unreliable, best effort, etc.). > > Mike > > > > On Mon, May 14, 2012 at 7:03 PM, Maxim Michel <[email protected]>wrote: > >> Hello again, >> >> For my scenario i keep sending a serial command from a c# app to my >> shimmer every 1 second over Bluetooth. >> As soon as the Shimmer hasn't got any BT-connection anymore (so no serial >> commands are received) the Shimmer must perform a function call (i.e. >> SD-logging() ). When he starts to receive the commands again, it must call >> another function (i.e. streamingdata() ). >> >> Does anyone see a solution on how to write this in code? Or does this >> seem to be unlikely to work? >> >> Thanks >> >> >> _______________________________________________ >> Shimmer-users mailing list >> [email protected] >> https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users >> >> >
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