Hello, I'm fairly new to coding but have started a project with temperature sensors on my Arduino Uno device. I am trying to take measurements on air temperature using a ds18b20 thermometer. Our Real time clock is not syncing up to our system and I am in desperate need of help coming up with a solution. The clock is 2 months behind. How can i get my device to sync up to my laptop. It runs off of windows 10. Here is my code:
// This code will output 2 temperature sensor readings along with timestamps. This data will be output to the serial port as well as an SD card.
// One Wire Digital Temp Sensor DS18B20 (Sparkfun: SEN-00245), Adafruit Datalogging Shield
// By: Spencer McDonald
// 2/19/14
// To connect the digital temp sensor: Flat facing away, pins pointing down, starting at right, GND - bus - 5V. NOTE: 4.7 kOhm between 5 V and bus
// To connect the SD/RTC shield, plug it in.
// The RTC uses the I2C bus [A4 and A5], the digital temp sensors use digital pin 2. The SD card uses digital pins 10-13.
// Libraries to include
#include "SD.h" // SD library
#include <Wire.h> // RTC library
#include "RTClib.h"
#include <OneWire.h> // Digital temperature library
#include <DallasTemperature.h>
// Initalize Variables
#define LEDpin 4
#define ONE_WIRE_BUS 2
float intempC = 0;
const int chipSelect = 10; // Sparkfun SD uses 8
File datalog;
char filename[] = "LOGGER00.csv";
RTC_DS1307 RTC;
// Initalize Digital temperature sensor
// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
// Arrays to hold device address
DeviceAddress insideThermometer;
void setup()
{
Serial.begin(115200); // Opens the communication between Arduino and computer serial port
Wire.begin(); // Begins RTC communication
RTC.begin();
sensors.begin(); // Begins digital temp sensor
// Check if RTC is running, if not fix it
if (! RTC.isrunning()) {
Serial.println("RTC is NOT running!");
// following line sets the RTC to the date & time this sketch was compiled
RTC.adjust(DateTime(DATE, TIME));
}
// Initalize SD Card
Serial.print("Intializing SD Card...");
pinMode(10, OUTPUT); // Necessary for microSD shield
if(!SD.begin(chipSelect))
{
Serial.println("Card failed, or not present");
return;
}
Serial.println("Card initialized.");
Serial.print("Creating File...");
// Make a new file each time the arduino is powered
for (uint8_t i = 0; i < 100; i++)
{
filename[6] = i/10 + '0';
filename[7] = i%10 + '0';
if (! SD.exists(filename))
{
// only open a new file if it doesn't exist
datalog = SD.open(filename, FILE_WRITE);
break;
}
}
Serial.print("Logging to: ");
Serial.println(filename);
if(!datalog)
{
Serial.println("Couldn't Create File");
return;
}
// Print Header
String Header = "RTC Date, RTC Time, In Temp
";
datalog = SD.open(filename, FILE_WRITE);
datalog.println(Header);
Serial.println(Header);
// Get address of digital temp sensor
if (!sensors.getAddress(insideThermometer, 0)) {
datalog.println("Unable to find address for Device 0");
Serial.println("Unable to find address for Device 0");
}
// Set the resolution to 9 bit
sensors.setResolution(insideThermometer, 12);
datalog.close();
digitalWrite(LEDpin, OUTPUT);
}
//___________________________________________________________________________________
void loop()
{
datalog = SD.open(filename, FILE_WRITE);
// Real Time Clock
DateTime now = RTC.now();
datalog.print(now.month(), DEC);
datalog.print("/");
datalog.print(now.day(), DEC);
datalog.print("/");
datalog.print(now.year(), DEC);
datalog.print(",");
datalog.print(now.hour(), DEC);
datalog.print(":");
datalog.print(now.minute(), DEC);
datalog.print(":");
datalog.print(now.second(), DEC);
datalog.print(",");
Serial.print(now.month(), DEC);
Serial.print("/");
Serial.print(now.day(), DEC);
Serial.print("/");
Serial.print(now.year(), DEC);
Serial.print(", ");
Serial.print(now.hour(), DEC);
Serial.print(":");
Serial.print(now.minute(), DEC);
Serial.print(":");
Serial.print(now.second(), DEC);
Serial.print(", ");
// Digital Temperature
sensors.requestTemperatures(); // There might be a better place for this function
intempC = sensors.getTempC(insideThermometer);
datalog.print(intempC);
Serial.print(intempC);
// Close the file and flash LED to show data was recorded
datalog.println("");
Serial.println("");
datalog.close();
//digitalWrite(LEDpin, HIGH); //Flash a LED to know that it is logging data
delay(1000);
//digitalWrite(LEDpin, LOW);
}