GPS tracker identification based on NMEA protocol

I have several vehicles equiped each with individual GPS tracker sending NMEA stream to a server. 开发者_运维问答

Prior to storage at the server side, I want to be able to uniquely identify each vehicle.

Is that possible using NMEA protocol?

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You'll need to see to what extent your GPS trackers support the NMEA specification.

You should be able to retrieve the data you need from the sentence$GPSTN. This will be received as $--STN,xx where xx is an ID number.

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you can able to uniquely identify each vehicle by choosing port for each device.

example : vehicle001 IP : xx.xx.xx.xx Port 50001 vehicle002 IP : xx.xx.xx.xx Port 50002 vehicle003 IP : xx.xx.xx.xx Port 50003