Hi Ram, A single Bluetooth master can only connect to a maximum of 7 slave devices at a time. However you could use multiple Bluetooth radios simultaneously on a PC (as masters) to scale as required. The problem here is that Windows does not support using multiple Bluetooth radios simultaneously. There are commercial products that can overcome this problem (and have successfully been used with Shimmers in the past), e.g. http://www.bluegiga.com/Bluetooth_Access_Servers.
The sampling rate of the shimmers and the amount of data that is being read by the PC is also important, as the PC's processing speed can be the bottle-neck. Of course the channel bandwidth is also important, as there is only so much information that can be sent at one time. When using the 802.15.4 there is no practical limitations to the amount of shimmers that can be communicated with, again taking the bandwidth and PC processing speeds into account. Mike On Tue, Jan 10, 2012 at 10:41 AM, Ramanathan Subramanian < [email protected]> wrote: > Dear All > > Is there some pointer to the maximum number of Shimmer devices that one > can simultaneously connect to and record the data? It appears that using > the Shimmer Labview library, one can record data from 4 sensors > simultaneously, but is this the maximum limit? > > Thanks very much > Ram > > _______________________________________________ > Shimmer-users mailing list > [email protected] > https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users > >
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