/Designs/Data_loggers/GPSRL04A/SW/Datalogger/Datalogger.ino
1,57 → 1,41
/*
SD card datalogger
SD card datalogger GPSRL04A
This example shows how to log data from three analog sensors
to an SD card using the SD library.
The circuit:
* analog sensors on analog ins 0, 1, and 2
* analog sensors are connected to analog ins PC0, PC1
* SD card attached to SPI bus as follows:
** MOSI - pin 11
** MISO - pin 12
** CLK - pin 13
** CS - pin 4
** MOSI - pin PB3
** MISO - pin PB4
** CLK - pin PB5
** CS - pin PD4
created 24 Nov 2010
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
*/
 
#include <SD.h>
 
const int chipSelect = 4; // CS is PD4
int LED = 5; // LED is conected from PD5 to LED at GPS module
unsigned int n = 0; // measurement counter
char inChar; // input character from GPS
String dataString = ""; // concantenated string with NMEA messages and measured values
String filename = "log.csv"; // generated filename for log file
int coll = 0; // collons counter in NMEA messages
 
// On the Ethernet Shield, CS is pin 4. Note that even if it's not
// used as the CS pin, the hardware CS pin (10 on most Arduino boards,
// 53 on the Mega) must be left as an output or the SD library
// functions will not work.
const int chipSelect = 4;
int led = 5;
unsigned int n = 0;
char inChar;
String dataString = "";
String filename = "log.csv";
int coll = 0;
 
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
while (!Serial) {;}
 
 
Serial.print("Initializing SD card...");
Serial.print("Initializing SD card..."); // inserting a SD Card always reset the processor and call setup
// make sure that the default chip select pin is set to
// output, even if you don't use it:
pinMode(10, OUTPUT);
pinMode(led, OUTPUT);
pinMode(10, OUTPUT); // PB2
pinMode(LED, OUTPUT);
 
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {
if (!SD.begin(chipSelect))
{
Serial.println("Card failed, or not present");
// don't do anything more:
return;
59,9 → 43,8
Serial.println("card initialized.");
 
dataString = "";
ReadGPRMC();
 
// filename = dataString.substring(0,5) + dataString.substring(dataString.length()-5,dataString.length()) + filename;
ReadGPRMC(); // read time from GPS
// derive file name fom time (YYMMDDHH.CSV)
int len = dataString.length()-1;
filename = dataString.substring(len-2,len) + dataString.substring(len-4,len-2) + dataString.substring(len-6,len-4) + dataString.substring(0,2) + ".CSV ";
}
68,41 → 51,39
 
void loop()
{
dataString = "";
ReadGPRMC();
dataString = ""; // make a string for assembling the data to log
ReadGPRMC(); // read NMEA sentences from GPS
ReadGPGGA();
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(20); // wait for a second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(20); // wait for a second
digitalWrite(LED, HIGH); // turn the LED on (HIGH is the voltage level)
delay(20); // wait for a while
digitalWrite(LED, LOW); // turn the LED off by making the voltage LOW
delay(20); // wait for a while
 
// make a string for assembling the data to log:
// String dataString = "";
dataString += String(n++);
dataString += ",";
 
// read three sensors and append to the string:
// read analog values from sensors and append to the string:
for (int analogPin = 0; analogPin < 2; analogPin++)
{
int sensor = analogRead(analogPin);
dataString += String(sensor);
if (analogPin < 1)
if (analogPin < 1) // suppress last coma
{
dataString += ",";
}
}
 
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
char fileNameCharArray[filename.length()];
filename.toCharArray(fileNameCharArray, filename.length());
File dataFile = SD.open(fileNameCharArray, FILE_WRITE);
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
//File dataFile = SD.open(filename, FILE_WRITE);
 
// if the file is available, write to it:
if (dataFile) {
if (dataFile)
{
dataFile.println(dataString);
dataFile.close();
// print to the serial port too:
110,11 → 91,12
}
// if the file isn't open, pop up an error:
else {
Serial.println("error opening datalog.txt");
Serial.println("error opening datalog.CSV");
}
}
 
 
// function for reading $GPRMC NMEA message
void ReadGPRMC()
{
// $GPRMC,091451.00,A,4915.64143,N,01441.50397,E,0.053,,090215,,,A*74
121,7 → 103,7
 
coll = 0;
while(1)
while(1) // wait for $GPRMC
{
// get incoming byte:
while (!Serial.available());
148,10 → 130,11
if (inChar == ',') coll++;
dataString += inChar;
}
while (coll < 9);
while (coll < 9); // read only 9 coma separated values
}
 
 
// function for reading $GPGGA NMEA message
void ReadGPGGA()
{
// $GPGGA,091451.00,4915.64143,N,01441.50397,E,1,09,0.90,443.2,M,44.0,M,,*50
158,9 → 141,8
 
coll = 0;
while(1)
while(1) // wait for $GPGGA
{
// get incoming byte:
while (!Serial.available());
if (Serial.read() != '$') continue;
while (!Serial.available());
183,9 → 165,9
while (!Serial.available());
inChar = (char)Serial.read();
if (inChar == ',') coll++;
if (coll > 4) dataString += inChar;
if (coll > 4) dataString += inChar; // skip first 5 coma separated values
}
while (coll < 12);
while (coll < 12); // read only 7 coma separated values
}