riffle-beta-0.1.0-test-0.1.0.ino

#include <Wire.h>
#include <SPI.h>
#include <RTClib.h>
#include <RTC_DS3231.h>
#include<stdlib.h>
#include <SD.h>

// This code requires that the following library be installed:
// Mizraith's RTC library: https://github.com/mizraith/RTClib
// it also requires:
// -- that a microSD card be placed in the microSD card holder
// -- that a coin cell be placed on the board

//RTC stuff
RTC_DS3231 RTC;

//led for output 
#define led 9

// working flag:  0: not working; 1: working;
int workingFlag = 1; // 

//SD card variables 

const int chipSelect = 7;
int SDpower = 6;


void setup() {

  digitalWrite(led,LOW);  // begin in state of 'not working'

  
  pinMode(SDpower,OUTPUT);
  digitalWrite(SDpower,LOW);
    
     if (!SD.begin(chipSelect)) {
       // SD failed or not present
        workingFlag=0;    
    }
  
  // begin I2C protocol (necessary for RTC)
  Wire.begin();
  RTC.begin();

  //broadcast that we're working
  
  if (workingFlag==1) {
    for (int j=0;j<200;j++) {
      digitalWrite(led,HIGH);
      delay(10);
      digitalWrite(led,LOW);
    }
  }
  
}

void loop() {}

Diagnostic

Requirements

• Mizraith's RTC library must be installed in the /Libraries folder: https://github.com/mizraith/RTClib
• a microSD card be placed in the microSD card holder
• a coin cell be placed on the board

Procedure:

1. Place a coin cell battery into the holder
2. Place a microSD card into the microSD card holder
3. Load the above code.

Diagnostic:

• If the code begins at all, then the onboard LED D1 should be on, steadily (no blink)
• If the microSD card can be accessed, and the RTC can be accessed, the onboard LED D1 should blink fast (with a period of 10ms).