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synchronize two measurement boards through a wireless connection

Started by Bill October 28, 2008
Hello



I need to synchronize two measurement boards through a wireless connection.



Is it possible through bluetooth?



Any advise how to do that?




On Oct 28, 5:11=A0am, "Bill" <bil...@bill.com> wrote:
> Hello > > I need to synchronize two measurement boards through a wireless connectio=
n.
> > Is it possible through bluetooth? > > Any advise how to do that?
to what resolution? to what goal? keeping result timing between the two precise? Or keeping the time result accurate? Are you looking for something similar to NTP (the Network Time Protocol)? Ed (to give you much more advice than that, I would have to charge you.)
Hello again

The goal is to synchronize two or more measurement boards that shall start 
to sample X samples when receiving the "GO" signal.

The GO signal should be transmitted by the master system and all boards 
should be listening for it simultaneously.

All the boards should start sampling the first sample within 1mS.

The starting points of the first samples are important.




"Ed Prochak" <edprochak@gmail.com> skrev i meddelandet 
news:4c45f691-44ef-466d-b734-2689b379c814@v53g2000hsa.googlegroups.com...
On Oct 28, 5:11 am, "Bill" <bil...@bill.com> wrote:
> Hello > > I need to synchronize two measurement boards through a wireless > connection. > > Is it possible through bluetooth? > > Any advise how to do that?
to what resolution? to what goal? keeping result timing between the two precise? Or keeping the time result accurate? Are you looking for something similar to NTP (the Network Time Protocol)? Ed (to give you much more advice than that, I would have to charge you.)
From Sweden wrote:

> Hello again > > The goal is to synchronize two or more measurement boards that shall > start to sample X samples when receiving the "GO" signal. > > The GO signal should be transmitted by the master system and all boards > should be listening for it simultaneously. > > All the boards should start sampling the first sample within 1mS. > > The starting points of the first samples are important.
They might start together but will they continue to keep the same timing over a number of measurements. You should probably look at protocols like NTP, TTP, IEEE1588, PXI and LXI. <http://www.lxistandard.org/> <http://ieee1588.nist.gov/> <http://www.ttp.com/> <http://www.ntp.org/> <http://www.pxisa.org/> These links should prove useful to you. If you can get near to a TCP/IP arrangement then one of these should help a great deal. -- ******************************************************************** Paul E. Bennett...............<email://Paul_E.Bennett@topmail.co.uk> Forth based HIDECS Consultancy Mob: +44 (0)7811-639972 Tel: +44 (0)1235-811095 Going Forth Safely ..... EBA. www.electric-boat-association.org.uk.. ********************************************************************