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Hello all,

I've been playing around with a few spare 'bits and bobs' and sucessfully made a little GPS receiver using a NEO-8M chip and a spare Arduino I had (plus an ethernet shield). I was just going to use it to set the time on my astroberry / stellarmate when not connected to the network, but then I came across this very interesting driver in the INDI library: www.indilib.org/devices/auxiliary/gps-nmea.html

This seems to do a lot of the hard work for me.... but I cannot fathom how to actually send the data from the GPS chip (using the serial connection, as it were) to generate a web server for the INDI to connect to as client.

So, this is just a shout out to the collective to see if anyone has already tried and come up with a solution, before I spend another day googling! I suspect I have simply miss-understood the syntax/formatting... but so far the detail of how to fix this has eluded me....

Any words of wisdom would be great! (arduno sketch below for those interested...)

Phil

#include <TinyGPS++.h>
#include <SPI.h>
#include <Ethernet.h>

// The TinyGPS++ object
TinyGPSPlus gps;

// set up the simple web server
byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 1, 128);
EthernetServer server(80);

void setup() {
  // Open serial communications and wait for port to open:
  Serial1.begin(9600);
  while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only
  }
  Serial.println("Ethernet WebServer");

  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  // Check for Ethernet hardware present
  if (Ethernet.hardwareStatus() == EthernetNoHardware) {
    Serial.println("Ethernet shield was not found.  Sorry, can't run without hardware. :(");
    while (true) {
      delay(1); // do nothing, no point running without Ethernet hardware
    }
  }
  
  if (Ethernet.linkStatus() == LinkOFF) {
    Serial.println("Ethernet cable is not connected.");
  }
  
  // Now, start the server
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
  
} //end of setup loop


void loop() {

  //Get the GPS data and interpret...
  while (Serial1.available() > 0)
    gps.encode(Serial1.read());
    
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    Serial.println("new client");
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c);
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == '\n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connection: close");  // the connection will be closed after completion of the response
          client.println("Refresh: 2");  // refresh the page automatically every 2 sec
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");

// Below is the raw output of the GPS chip (NMEA format)... But it doesn't work when added directly to the web server code.
// Formatting/syntax issues? But I wonder what format the GPS NMEA server needs anyway?
//
            client.print(F(" Hour=")); // but this is fine... but just goes to the web browser... not the INDI client.
            client.print(gps.time.hour());
            client.print(F(" Minute="));
            client.print(gps.time.minute());
            client.print(F(" Second="));
            client.println(gps.time.second());
            
          client.println("<br />");
          
            client.print(F(" Lat="));
            client.print(gps.location.lat(), 6);
            client.print(F(" Long="));
            client.println(gps.location.lng(), 6);

          client.println("<br />");

            client.print(F("#SATS= "));
            client.print(gps.satellites.value());    
            client.print(F(" Meters="));
            client.println(gps.altitude.meters());
          
          client.println("<br />");

        if (Serial1.available() > 0){
          client.println(Serial1.read()); //this works in the serial monotir but in the server only posts two characters...
        }
          
          client.println("</html>");
          break;
        }
        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
        } else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
    // close the connection:
    client.stop();
    Serial.println("client disconnected");
  }

// This is the raw output of NMEA ... client wont work when it runs... due to the loop... 
//if (Serial1.available() > 0){
//Serial.write(Serial1.read());
//}

// This is the parsed data, using TinyGPS++ to see if it's working - it's fine, in the arduino serial monitor...
//
/*  if (gps.location.isUpdated())
  {
    Serial.print(F("LOCATION   Fix Age="));
    Serial.print(gps.location.age());
    Serial.print(F(" Lat="));
    Serial.print(gps.location.lat(), 6);
    Serial.print(F(" Long="));
    Serial.println(gps.location.lng(), 6);
  }
  else if (gps.date.isUpdated())
  {
    Serial.print(F("DATE       Fix Age="));
    Serial.print(gps.date.age());
    Serial.print(F("ms Raw="));
    Serial.print(gps.date.value());
    Serial.print(F(" Year="));
    Serial.print(gps.date.year());
    Serial.print(F(" Month="));
    Serial.print(gps.date.month());
    Serial.print(F(" Day="));
    Serial.println(gps.date.day());
  }
  else if (gps.time.isUpdated())
  {
    Serial.print(F("TIME       Fix Age="));
    Serial.print(gps.time.age());
    Serial.print(F("ms Raw="));
    Serial.print(gps.time.value());
    Serial.print(F(" Hour="));
    Serial.print(gps.time.hour());
    Serial.print(F(" Minute="));
    Serial.print(gps.time.minute());
    Serial.print(F(" Second="));
    Serial.print(gps.time.second());
  }
  else if (gps.altitude.isUpdated())
  {
    Serial.print(F("ALTITUDE   Fix Age="));
    Serial.print(gps.altitude.age());
    Serial.print(F("ms Raw="));
    Serial.print(gps.altitude.value());
    Serial.print(F(" Meters="));
    Serial.println(gps.altitude.meters());
  }
  else if (gps.satellites.isUpdated())
  {
    Serial.print(F("SATELLITES Fix Age="));
    Serial.print(gps.satellites.age());
    Serial.print(F("ms Value="));
    Serial.println(gps.satellites.value());
  }
*/

// the final loop void loop close  
}