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GPS Example

This example demonstrates the Serial data capabilities of the EZ Web Lynx system. Most GPS enabled devices use a standard protocol called NMEA to send their positional data back to a receiver. In this example, the following serial stream of ASCII characters was sent to the EZ Web Lynx which then using the Serial Data command displayed the relevant sections on a web page.

$GPGGA,055819,6409.038,N,10131.000,E,1,08,0.9,345.4,M,46.9,M,,*47

A web page was created using the following HTML that would parse this stream and display the relevant data such as the longitude, latitude, and altitude.

Sample HTML - GPS

<html>
  <head>
  </head>
  <body>
    <p style="text-align:center;">
      <b><span style="font-size:48px">GPS Location</span></b>
    </p>
    <p>
      <hr/> 
      <!--(EXEC SERIAL_START=0x24,0x47,0x50,0x47,0x47,0x41)-->
	  <!--translates to $GPGGA-->
      <!--(EXEC SERIAL_END=0x2A,0x34,0x37)-->
	  <!--translates to *47-->
    </p>
    <p>
      <span style="font-size:18pt;"><b>Longitude:</b></span>
      <!--(IF SERIAL_KBHIT > 0)--><!--(SERIAL DATA 25 27)--> deg 
      <!--(SERIAL DATA 28 33)-->' <!--(SERIAL DATA 35 35)-->
      <!--(ELSE)--><b>NO SERIAL DATA!</b><!--(ENDIF)-->
    </p>
    <p>
      <span style="font-size:18pt;"><b>Latitude:</b></span> 
      <!--(IF SERIAL_KBHIT > 0)--><!--(SERIAL DATA 14 15)--> deg 
      <!--(SERIAL DATA 16 21)-->' <!--(SERIAL DATA 23 23)-->
      <!--(ELSE)--><b>NO SERIAL DATA!</b><!--(ENDIF)-->
    </p>
    <p>
      <span style="font-size:18pt;"><b>Altitude:</b></span> 
      <!--(IF SERIAL_KBHIT > 0)--><!--(SERIAL DATA 46 50)--> 
      <!--(SERIAL DATA 52 52)-->
      <!--(ELSE)--><b>NO SERIAL DATA!</b><!--(ENDIF)-->
    </p>
    <p>
      <span style="font-size:18pt;"><b>Time:</b></span> 
      <!--(IF SERIAL_KBHIT > 0)--><!--(SERIAL DATA 7 8)-->:
      <!--(SERIAL DATA 9 10)-->:<!--(SERIAL DATA 11 12)-->
      <!--(ELSE)--><b>NO SERIAL DATA!</b><!--(ENDIF)-->
    </p>
  </body>
</html>