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Building a simple GPS 'NMEA server' on an Arduino for INDI?
- Phil Benson
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- Posts: 7
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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
<code>
#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
}
</code>
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
<code>
#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
}
</code>
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- Jasem Mutlaq
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- Offline
- Administrator
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- Phil Benson
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Topic Author
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- New Member
-
- Posts: 7
- Thank you received: 0
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