Chronodot Hangs during initialization

[aguo5520]

Hi there,

My chronodot is "hanging" after it prints "Doing RTC checks..." from the code below:

Code: Select all

//AVERAGE EVERY MINUTE
#include <Wire.h>
#include <SPI.h>
#include <RTClib.h>
#include <RTC_DS3231.h>
#include <SD.h>
#include <SD_t3.h>

RTC_DS3231 RTC;

String year, month, day, second, hour, minute;
float measurement, pm, pmtotal, pmAverage, voltage, current, total;
int j;
int numLoops;
File myFile;

String writeString;
const char* buffer = "test.txt";

long currentTime, previousTime;

void setup() {
  //set the serial's Baudrate
  Serial.begin(9600);
  delay(1000);

  //Initialize counter and pm total variables
  j = 1;
  pmtotal = 0;

  //--------RTC SETUP ------------
  Serial.print("Initializing RTC Chronodot...");
//  delay(1000);
  Wire.begin();
  RTC.begin();
  Serial.print("Doing RTC checks...");
//  delay(1000);
  //Check if RTC is running
  if (! RTC.isrunning()) {
    Serial.println("RTC is NOT running!");
//    delay(1000);
    // following line sets the RTC to the date & time this sketch was compiled
    //ONLY UNCOMMENT BELOW IF TIME NOT ALREADY SET!!!
    //RTC.adjust(DateTime(__DATE__, __TIME__));
  }
  Serial.print("Setting up RTC now...");
//  delay(1000);
  DateTime now = RTC.now();
  previousTime = 0;
  DateTime compiled = DateTime(__DATE__, __TIME__);
  if (now.unixtime() < compiled.unixtime()) {
    Serial.println("RTC is older than compile time!  Updating");
//    delay(1000);
    //ONLY UNCOMMENT BELOW IF TIME NOT ALREADY SET!!!
    //RTC.adjust(DateTime(__DATE__, __TIME__));
  }
  char datastr[100];
  RTC.getControlRegisterData( datastr[0]  );
  Serial.println("done");
//  delay(1000);


  //---------SD Setup-------------------
  Serial.print("Initializing SD card...");

  if (!SD.begin(10)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");

  //  sdLog(buffer, "TSI Box 1: New Logging Session");
}



void loop()
{

  measurement = analogRead(A0);
  //  Serial.print("Analog Read 0 is: ");
  //  Serial.println(measurement);
  voltage = (measurement / 1023) * 3.32;
  //  Serial.print("Voltage = ");
  //  Serial.println(voltage);
  current = (voltage / 163.5) * 1000; // I = V/R (mult 1000 for mA)
  pmtotal += (300 - 5) / (20 - 4) * (current - 4);

  //    Serial.print("TSI Sensor PM level is: ");
  //    Serial.println(pm);
  DateTime now = RTC.now();
  
  if (now.second() != previousTime) { //If a second has passed
    
    previousTime = now.second(); // set previous time to current time
    year = String(now.year(), DEC);
    month = String(now.month(), DEC);
    day = String(now.day(), DEC);
    hour = String(now.hour(), DEC);
    minute = String(now.minute(), DEC);
    second = String(now.second(), DEC);
    
    Serial.print(year);
    Serial.print('/');
    Serial.print(month);
    Serial.print('/');
    Serial.print(day);
    Serial.print(' ');
    Serial.print(hour);
    Serial.print(':');
    Serial.print(minute);
    Serial.print(':');
    Serial.print(second);
    Serial.print(" ");

    pmAverage = pmtotal / j;

    //make sure pmAverage is positive in case of negative readings
    //    if (pmAverage < 0) {
    //      pmAverage = 0;
    //    }

    Serial.println(pmAverage);

    writeString = year + "/" + month + "/" + day + " " + hour + ":" + minute + ":" + second + " " + pmAverage;

    sdLog(buffer, writeString);

    j = 1;
    pmtotal = 0;
  }

  j++;
  delay(50);
}

void sdLog(const char* fileName, String stringToWrite) {
  File myFile = SD.open(fileName, FILE_WRITE);

  // if the file opened okay, write to it:
  if (myFile) {
    Serial.print("Writing to ");
    Serial.print(fileName);
    Serial.print("...");
    myFile.println(stringToWrite);
    // close the file:
    myFile.close();
    Serial.println("done.");
  } else {
    // if the file didn't open, print an error:
    Serial.print("error opening ");
    Serial.println(fileName);
  }
}

Sometimes it will simply output:

Code: Select all

Initializing RTC Chronodot...Doing RTC checks...

and then it the program will just stop there and not move forward.

The weird thing is that when this only occurs sometimes, after I've reuploaded code (with the same code pertaining to the clock) or after I've disconnected and reconnected the usb.
Another thing I should mention is that I've switched out my chronodot with 2 others, and the same thing occurs.
Thanks for your help!

[adafruit_support_rick]

Don't call Wire.begin(). See if that helps.