Category Archives: Message Formats

Information about the serial I/O messaging and NMEA message formats

Identifying Digital Input States in a $PRAVE message

The $PRAVE message has the status of each input as represented by a single digit hexadecimal number in field 12. For example, the the $PRAVE message below, the last 3 represents the digital inputs from transponder 0001. $PRAVE,0001,0001,3308.9051,-11713.1164,195348,1,10,168,31,13.3,3,-83,0,0,,*66 In this example field 12 has value 3.  The field 12 value is the hexadecimal binary representation […]

Vehicle Tracking Message Formats

When a Raveon GPS Transponder received an over-the-air position message from a tracked car, boat, truck, or person, it sends a message out of its serial port.  The message it outputs contains the ID of the vehicle that it received the position report from, along with the vehicle’s latitude and longitude. A typical message would […]

The $PRAVE Message Format

Overview GPS tracking over-the-air position/status messages that the GPS transceiver and the Atlas Personal Locator may receive are sent out the serial port using Raveon’s tracking message format called the $PRAVE message. The $PRAVE message is structured like NMEA messages, and is used to pass the tracked item’s ID, location, speed, direction, altitude, temperature, and […]