I am trying to make a data logger using a DS3231 RTC module with temp and an SD card that also displays on an OLED display. The final is two constantly blinking LED's. I combined a bunch of code, but I am assuming that the blinking LED's are getting hung up with the delay's that are present in the rest of the code. Just looking for some guidance.
CODE:
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SD.h>
#include <DS3231.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
#define button1 9 // Button B1 is connected to Arduino pin 9
#define button2 8 // Button B2 is connected to Arduino pin 8
#define buzzer 3
//SD Card
File myFile;
DS3231 rtc(SDA, SCL);
int pinCS = 10; // Pin 10 on Arduino Uno
//LEDBLINKNODELAY
// constants won't change. Used here to set a pin number:
const int ledPin1 = A1; // the number of the LED pin
const int ledPin2 = A2;
// Variables will change:
int ledState = LOW; // ledState used to set the LED
// Generally, you should use "unsigned long" for variables that hold time
// The value will quickly become too large for an int to store
unsigned long previousMillis = 0; // will store last time LED was updated
// constants won't change:
const long interval = 1000; // interval at which to blink (milliseconds)
void setup(void) {
//sdcard
Serial.begin(9600);
pinMode(pinCS, OUTPUT);
// SD Card Initialization
if (SD.begin())
{
Serial.println("SD card is ready to use.");
} else
{
Serial.println("SD card initialization failed");
return;
}
rtc.begin();
// set the digital pin as output:
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
//rtc
pinMode(button1, INPUT_PULLUP);
pinMode(button2, INPUT_PULLUP);
pinMode(buzzer, OUTPUT);
digitalWrite(buzzer, HIGH);
delay(1000);
Serial.begin(115200);
// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr
// init done
// Clear the display buffer.
display.clearDisplay();
display.display();
display.setTextColor(WHITE,BLACK);
display.drawRect(117, 55, 3, 3, WHITE); // Put degree symbol ( ° )
draw_text(0, 55, "TEMPERATURE =", 1);
draw_text(122, 55, "C", 1);
}
char Time[] = " : : ";
char Calendar[] = " / /20 ";
char temperature[] = " 00.00";
char temperature_msb;
byte i, second, minute, hour, day, date, month, year, temperature_lsb;
void display_day(){
switch(day){
case 1: draw_text(0, 0, " SUNDAY ", 1); break;
case 2: draw_text(0, 0, " MONDAY ", 1); break;
case 3: draw_text(0, 0, " TUESDAY ", 1); break;
case 4: draw_text(0, 0, "WEDNESDAY", 1); break;
case 5: draw_text(0, 0, "THURSDAY ", 1); break;
case 6: draw_text(0, 0, " FRIDAY ", 1); break;
default: draw_text(0, 0, "SATURDAY ", 1);
}
}
void DS3231_display(){
// Convert BCD to decimal
second = (second >> 4) * 10 + (second & 0x0F);
minute = (minute >> 4) * 10 + (minute & 0x0F);
hour = (hour >> 4) * 10 + (hour & 0x0F);
date = (date >> 4) * 10 + (date & 0x0F);
month = (month >> 4) * 10 + (month & 0x0F);
year = (year >> 4) * 10 + (year & 0x0F);
// End conversion
Time[7] = second % 10 + 48;
Time[6] = second / 10 + 48;
Time[4] = minute % 10 + 48;
Time[3] = minute / 10 + 48;
Time[1] = hour % 10 + 48;
Time[0] = hour / 10 + 48;
Calendar[9] = year % 10 + 48;
Calendar[8] = year / 10 + 48;
Calendar[4] = month % 10 + 48;
Calendar[3] = month / 10 + 48;
Calendar[1] = date % 10 + 48;
Calendar[0] = date / 10 + 48;
if(temperature_msb < 0){
temperature_msb = abs(temperature_msb);
temperature[0] = '-';
}
else
temperature[0] = ' ';
temperature_lsb >>= 6;
temperature[2] = temperature_msb % 10 + 48;
temperature[1] = temperature_msb / 10 + 48;
if(temperature_lsb == 0 || temperature_lsb == 2){
temperature[5] = '0';
if(temperature_lsb == 0) temperature[4] = '0';
else temperature[4] = '5';
}
if(temperature_lsb == 1 || temperature_lsb == 3){
temperature[5] = '5';
if(temperature_lsb == 1) temperature[4] = '2';
else temperature[4] = '7';
}
draw_text(60, 0, Calendar, 1); // Display the date (format: dd/mm/yyyy)
draw_text(10, 24, Time, 2); // Display the time
draw_text(75, 55, temperature, 1); // Display the temperature
if(Time[0]=='2' && Time[1]=='0' && Time[3]== '3' && Time[4]=='0')
{
digitalWrite(buzzer, LOW);
}
else
{
digitalWrite(buzzer, HIGH);
}
}
void blink_parameter(){
byte j = 0;
while(j < 10 && digitalRead(button1) && digitalRead(button2)){
j++;
delay(25);
}
}
byte edit(byte x_pos, byte y_pos, byte parameter){
char text[3];
sprintf(text,"%02u", parameter);
while(!digitalRead(button1)); // Wait until button B1 released
while(true){
while(!digitalRead(button2)){ // If button B2 is pressed
parameter++;
if(i == 0 && parameter > 31) // If date > 31 ==> date = 1
parameter = 1;
if(i == 1 && parameter > 12) // If month > 12 ==> month = 1
parameter = 1;
if(i == 2 && parameter > 99) // If year > 99 ==> year = 0
parameter = 0;
if(i == 3 && parameter > 23) // If hours > 23 ==> hours = 0
parameter = 0;
if(i == 4 && parameter > 59) // If minutes > 59 ==> minutes = 0
parameter = 0;
sprintf(text,"%02u", parameter);
draw_text(x_pos, y_pos, text, 1);
delay(200); // Wait 200ms
}
draw_text(x_pos, y_pos, " ", 1);
blink_parameter();
draw_text(x_pos, y_pos, text, 1);
blink_parameter();
if(!digitalRead(button1)){ // If button B1 is pressed
i++; // Increament 'i' for the next parameter
return parameter; // Return parameter value and exit
}
}
}
void draw_text(byte x_pos, byte y_pos, char *text, byte text_size) {
display.setCursor(x_pos, y_pos);
display.setTextSize(text_size);
display.print(text);
display.display();
}
void loop() {
//sdcard
Serial.print(rtc.getTimeStr());
Serial.print(",");
Serial.println(int(rtc.getTemp()));
myFile = SD.open("test.txt", FILE_WRITE);
if (myFile) {
myFile.print(rtc.getTimeStr());
myFile.print(",");
myFile.println(int(rtc.getTemp()));
myFile.close(); // close the file
}
// if the file didn't open, print an error:
else {
Serial.println("error opening test.txt");
}
delay(3000);
// here is where you'd put code that needs to be running all the time.
// check to see if it's time to blink the LED; that is, if the difference
// between the current time and last time you blinked the LED is bigger than
// the interval at which you want to blink the LED.
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
// save the last time you blinked the LED
previousMillis = currentMillis;
// if the LED is off turn it on and vice-versa:
if (ledState == LOW) {
ledState = HIGH;
} else {
ledState = LOW;
}
// set the LED with the ledState of the variable:
digitalWrite(A1, ledState);
digitalWrite(A2, ledState);
}
if(!digitalRead(button1)){ // If button B1 is pressed
i = 0;
while(!digitalRead(button1)); // Wait for button B1 release
while(true){
while(!digitalRead(button2)){ // While button B2 pressed
day++; // Increment day
if(day > 7) day = 1;
display_day(); // Call display_day function
delay(200); // Wait 200 ms
}
draw_text(0, 0, " ", 1);
blink_parameter(); // Call blink_parameter function
display_day(); // Call display_day function
blink_parameter(); // Call blink_parameter function
if(!digitalRead(button1)) // If button B1 is pressed
break;
}
//set position of text when editing on button press
date = edit(60, 0, date); // Edit date
month = edit(80, 0, month); // Edit month
year = edit(110,0, year); // Edit year
hour = edit(14, 9, hour); // Edit hours
minute = edit(50, 9, minute); // Edit minutes
// Convert decimal to BCD
minute = ((minute / 10) << 4) + (minute % 10);
hour = ((hour / 10) << 4) + (hour % 10);
date = ((date / 10) << 4) + (date % 10);
month = ((month / 10) << 4) + (month % 10);
year = ((year / 10) << 4) + (year % 10);
// End conversion
// Write data to DS3231 RTC
Wire.beginTransmission(0x68); // Start I2C protocol with DS3231 address
Wire.write(0); // Send register address
Wire.write(0); // Reset sesonds and start oscillator
Wire.write(minute); // Write minute
Wire.write(hour); // Write hour
Wire.write(day); // Write day
Wire.write(date); // Write date
Wire.write(month); // Write month
Wire.write(year); // Write year
Wire.endTransmission(); // Stop transmission and release the I2C bus
delay(200); // Wait 200ms
}
Wire.beginTransmission(0x68); // Start I2C protocol with DS3231 address
Wire.write(0); // Send register address
Wire.endTransmission(false); // I2C restart
Wire.requestFrom(0x68, 7); // Request 7 bytes from DS3231 and release I2C bus at end of reading
second = Wire.read(); // Read seconds from register 0
minute = Wire.read(); // Read minuts from register 1
hour = Wire.read(); // Read hour from register 2
day = Wire.read(); // Read day from register 3
date = Wire.read(); // Read date from register 4
month = Wire.read(); // Read month from register 5
year = Wire.read(); // Read year from register 6
Wire.beginTransmission(0x68); // Start I2C protocol with DS3231 address
Wire.write(0x11); // Send register address
Wire.endTransmission(false); // I2C restart
Wire.requestFrom(0x68, 2); // Request 2 bytes from DS3231 and release I2C bus at end of reading
temperature_msb = Wire.read(); // Read temperature MSB
temperature_lsb = Wire.read(); // Read temperature LSB
display_day();
DS3231_display(); // Diaplay time & calendar
delay(50); // Wait 50ms
}
