Matt Welsh wrote:
We use a Garmin GPS18LVC which is an external GPS "puck" with a serial output that reports NMEA sentences in ASCII or binary format. It has an extra line for the 1 Hz GPS timepulse, which we tie to one of the mote's interrupt lines. This is accurate to within 1 usec of GPS time (though it is only reported at 1 Hz).
On Fri, 2004-08-27 at 18:08, Kristin Wright wrote:
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sumit Rangwala Sent: Friday, August 27, 2004 4:04 PM To: Tinyos Mailing List Subject: [Tinyos-help] GPS solutions for the motes
Hi, We are looking for a GPS card/device that we can connect to the mote to get very accurate time. The board from xbow (MTS420 CA) provides a maximum accuracy of 1 ms which is insufficient for our application. Does anyone know of any
The xbow mts420 board mounts a leadtek 9546 gps unit using
the sirfstarIIe chip with an embedded ARM7 processor. Time
resolution, according to the leadtek manual, is 1 usec.
Extracting synchronized gps time with this resolution requires *programming* the leadtek unit by sending the appropriate nmea or sirf string to the gps unit using uart1. Since the intersema barometer
sits on the same io line as the gps unit, make sure you
have the io state set correctly.
Hope this helps.
-dmd
other solution that can provide us accurate time in the range of micro sec.
Thanks,
Sumit
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