Dear all,
i’m trying to log the data of my grove multi channel gas sensor v1. My setup consists of Arduino Uno, sd-card Data Logger Shield (Older Version - with the RTC (DS1307)) and Arduino grove base shield.
I used and tested the sd-card with the lighttemplogger tutorial from Adafruit: Link
This showed me that writing on the sd-card is working, as well as creating and writing in a .csv file
Everything worked fine, so i tried to merge this example with the already tested example for the grove multi gas channel: Link
What is working as it should:
- creating a logfile
- the output to the serial monitor
What isn’t working as it should:
- there is no entry in the logfile, not even the header (which is telling me there should already be a mistake in my setup)
[code]
#include "RTClib.h"
#include <SD.h>
#include <MutichannelGasSensor.h>
#include <Wire.h>
#include <SPI.h>
#define LOG_INTERVAL 1000
#define SYNC_INTERVAL 1000
uint32_t syncTime = 0; // time of last sync()
RTC_DS1307 RTC; // define the Real Time Clock object
const int chipSelect = 10; // for the data logging shield, we use digital pin 10 for the SD cs line
File logfile;
void error(char *str)
{
Serial.print("error: ");
Serial.println(str);
while(1);
}
void setup(void)
{
Serial.begin(9600); // start serial for output
Serial.println();
Serial.print("Initializing SD card..."); // initialize the SD card
pinMode(10, OUTPUT); // make sure that the default chip select pin is set to output, even if you don't use it
if (!SD.begin(chipSelect))
{
error("Card failed, or not present"); // see if the card is present and can be initialized:
}
Serial.println("card initialized.");
char filename[] = "LOGGER00.CSV"; // create a new file
for (uint8_t i = 0; i < 100; i++)
{
filename[6] = i/10 + '0';
filename[7] = i%10 + '0';
if (! SD.exists(filename))
{
logfile = SD.open(filename, FILE_WRITE); // only open a new file if it doesn't exist
break; // leave the loop!
}
}
if (! logfile)
{
error("couldnt create file");
}
Serial.print("Logging to: ");
Serial.println(filename);
Wire.begin(); // connect to RTC
if (!RTC.begin())
{
logfile.println("RTC failed");
Serial.println("RTC failed");
}
logfile.println("datetime,NH3,CO,NO2,C3H8,C4H10,CH4,H2,C2H5OH");
Serial.println("datetime,NH3,CO,NO2,C3H8,C4H10,CH4,H2,C2H5OH");
Serial.println("power on!"); //start of the grove multi channel gas sensor
gas.begin(0x04); //the default I2C address of the slave is 0x04
gas.powerOn();
}
void loop(void)
{
DateTime now;
delay((LOG_INTERVAL -1) - (millis() % LOG_INTERVAL)); // delay for the amount of time we want between readings
now = RTC.now(); // fetch the time and log it
logfile.print(now.year(), DEC);
logfile.print("/");
logfile.print(now.month(), DEC);
logfile.print("/");
logfile.print(now.day(), DEC);
logfile.print(" ");
logfile.print(now.hour(), DEC);
logfile.print(":");
logfile.print(now.minute(), DEC);
logfile.print(":");
logfile.print(now.second(), DEC);
logfile.print(", ");
Serial.print(now.year(), DEC);
Serial.print("/");
Serial.print(now.month(), DEC);
Serial.print("/");
Serial.print(now.day(), DEC);
Serial.print(" ");
Serial.print(now.hour(), DEC);
Serial.print(":");
Serial.print(now.minute(), DEC);
Serial.print(":");
Serial.print(now.second(), DEC);
Serial.print(", ");
float c;
c = gas.measure_NH3();
if (c >= 0)
{
Serial.print(c);
logfile.print(c);
}
else
{
Serial.print("invalid");
}
Serial.print(",");
logfile.print(", ");
c = gas.measure_CO();
if (c >= 0)
{
Serial.print(c);
logfile.print(c);
}
else
{
Serial.print("invalid");
}
Serial.print(",");
logfile.print(", ");
c = gas.measure_NO2();
if (c >= 0)
{
Serial.print(c);
logfile.print(c);
}
else
{
Serial.print("invalid");
}
Serial.print(",");
logfile.print(", ");
c = gas.measure_C3H8();
if (c >= 0)
{
Serial.print(c);
logfile.print(c);
}
else
{
Serial.print("invalid");
}
Serial.print(",");
logfile.print(", ");
c = gas.measure_C4H10();
if (c >= 0)
{
Serial.print(c);
logfile.print(c);
}
else
{
Serial.print("invalid");
}
Serial.print(",");
logfile.print(", ");
c = gas.measure_CH4();
if (c >= 0)
{
Serial.print(c);
logfile.print(c);
}
else
{
Serial.print("invalid");
}
Serial.print(",");
logfile.print(", ");
c = gas.measure_H2();
if (c >= 0)
{
Serial.print(c);
logfile.print(c);
}
else
{
Serial.print("invalid");
}
Serial.print(",");
logfile.print(", ");
c = gas.measure_C2H5OH();
if (c >= 0)
{
Serial.print(c);
logfile.print(c);
}
else
{
Serial.print("invalid");
}
Serial.println();
delay(3000);
}
[/code]
Any input will be appreciated, thanks!
