Hi, so for a school project I was required to make some device and essentially, I attempted to make a PM detector using the following tutorial: https://www.instructables.com/Simple-Air-Pollution-Monitor-Using-an-Arduino-Uno-/
I'm on this step and when uploading my code, the process goes smoothly but on the actual Arduino, I don't see any changes on the LCD Display, nor are any files created upon examining the SD card. It seems as if the code isn't functioning at all. Note the wiring is correct because I have rewired it multiple times in hopes of fixing the problem.
Using a Arduino UNO R3 hooked up via Usb to a standard computer USB port.
#include "RTClib.h"
#include <LiquidCrystal.h>
#include <SD.h>
#include "SDS011.h"
LiquidCrystal lcd(14, 9, 5, 4, 7, 8);
File myFile;
RTC_DS3231 rtc;
SDS011 my_sds;
int Contrast=80;
float p10, p25;
int error;
int y,z,T;
void setup () {
Serial.begin(9600);
my_sds.begin(2, 3);
analogWrite(6,Contrast);
lcd.begin(16, 2);
Serial.print("Initializing SD card...");
// SD card pin output
pinMode(10, OUTPUT);
if (!SD.begin(10)) {
Serial.println("SD initialization failed!");
return;
}
Serial.println("SD initialization done.");
delay(3000); // wait for console opening
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
}
if (rtc.lostPower()) {
Serial.println("RTC lost power, lets set the time!");
// following line sets the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line can be used to set the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
}
}
void loop () {
error = my_sds.read(&p25, &p10);
if (!error) {
Serial.println("P2.5:" + String(p25));
Serial.println("P10:" + String(p10));
}
DateTime now = rtc.now();
lcd.clear();
lcd.setCursor(0, 0);
lcd.print(now.hour(), DEC);
lcd.print(':');
lcd.print(now.minute(), DEC);
lcd.print(':');
lcd.print(now.second(), DEC);
lcd.print(" T=");
T=rtc.getTemperature();
lcd.print(String(T));
lcd.print("C");
y = (int) p25;
z = (int) p10;
lcd.setCursor(0, 1);
lcd.print("P2.5=" + String(y));
lcd.print(" P10=" + String(z));
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("PMlog.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
Serial.print("Writing to PMlog.txt...");
myFile.print(now.year(), DEC);
myFile.print('/');
myFile.print(now.month(), DEC);
myFile.print('/');
myFile.print(now.day(), DEC);
myFile.print(";");
myFile.print(now.hour(), DEC);
myFile.print(':');
myFile.print(now.minute(), DEC);
myFile.print(':');
myFile.print(now.second(), DEC);
myFile.print(";");
myFile.print("T=");
myFile.print(T);
myFile.print("C");
myFile.print(";");
myFile.print("P2.5;" + String(y));
myFile.println(";P10;" + String(z));
// close the file:
myFile.close();
Serial.println("done.");
}
else {
// if the file didn't open, print an error:
Serial.println("error opening text file");
}
delay(1000);
}
