How to use a local GPS

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How to use a local GPS and report position

Things to know first

GPS serial output

Most GPS are capable of sending information through a simple serial link. Only the TXD and GROUND pins need to be connected to the PC, on any of the serial port. The GPS must be set at 4800 or 9600 bps, 8 bits, No Parity, and 1 stop bit.

GPS sentence recognized

The program looks for a sentence beginning with $GPRMC from the GPS. This sentence is common to most GPS.

UDP protocol

The program uses Multicast UDP protocol to report position to other PCs running the program. This protocol is common to most LAN and can be used on the Internet, as soon as the IP address (or domain name, or computer ID) and port are valid.

Step by step

1. In Options menu select GPS options

2. Enter the serial port at which the GPS is connected.

3. Enter unit to move. This is the unit that will move according to the GPS position received.

4. Enter IP address and port at which position will be reported.

5. Press Start to initiate local GPS decoding. Colour dot on the Status Bar should flash to show activity.

6. If Log was checked, sentences will be saved on file. Use Play back to verify.

23rd January 2014