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Thorn · 03-06-2003

Q: Why doesn't my Magellan GPS always work with NetStumbler?

A: For the Magellan Models 315 and 320, set the baud rate to 4800 and format to NMEA v2.1. These models need to establish their location BEFORE sending serial data, so make sure you have a satellite lock. The data is not transmitted until AFTER locking onto the satellites and the units switches to the NAV mode. If you are inside a building, give it plenty of time to wake up and see the satellites. Going outside speeds this up, as there is better sight of the satellites. Watch the signal level display bars. It needs to see 3 satellites minimum to establish a location. When it is ready, it will switch to the location mode, and start transmitting the data over the serial cable.

Also, check your serial word size, parity and stop bits are all set correctly under the Com port settings of the PC. It should be 4800,8,N,1 (4800 Baud, 8 Bits, No Parity, 1 Stop Bit.) The PC cannot read the data if these settings are wrong.

03-06-2003	#15 (permalink)
Thorn Did you do the math? Join Date: Apr 2002 Location: Villa Straylight Posts: 10,084	Magellan GPS Model 315/320 Q: Why doesn't my Magellan GPS always work with NetStumbler? A: For the Magellan Models 315 and 320, set the baud rate to 4800 and format to NMEA v2.1. These models need to establish their location BEFORE sending serial data, so make sure you have a satellite lock. The data is not transmitted until AFTER locking onto the satellites and the units switches to the NAV mode. If you are inside a building, give it plenty of time to wake up and see the satellites. Going outside speeds this up, as there is better sight of the satellites. Watch the signal level display bars. It needs to see 3 satellites minimum to establish a location. When it is ready, it will switch to the location mode, and start transmitting the data over the serial cable. Also, check your serial word size, parity and stop bits are all set correctly under the Com port settings of the PC. It should be 4800,8,N,1 (4800 Baud, 8 Bits, No Parity, 1 Stop Bit.) The PC cannot read the data if these settings are wrong. __________________ Thorn "I'm The Doctor. I'm a Time Lord. I am from the planet Gallifrey in the constellation Kasterborous. I'm 903 years old and I am the man who is going to save your lives and all 6 billion people on the planet below... You got a problem with that?"