Delete Datalogger_AP.ino

Datalogger_AP.ino

-#include "RTClib.h"; // For clock module
-#include "Wire.h"; // For communication with clock & T,h sensor via I2C communication
-#include "Adafruit_Si7021.h"; // For the T and h sensor
-Adafruit_Si7021 sensor = Adafruit_Si7021();
-#include "SPI.h"; // Library for SPI bus
-#include "SD.h"; // Library for SD card module
-
-RTC_DS1307 rtc;
-
-int year;
-int month;
-int day;
-int hour;
-int minute;
-int second;
-int lightIntensity;
-float relativeHumidity;
-float temperature;
-int ppmCO2;
-String filename;
-
-const int chipSelect = 10; // Variable as read only, when declared as constant
-
-// CO2-Messung mit Sensor Typ MHZ19B
-// Messwerterfassung durch PWM-Signal
-// Quelle: https://www.blikk.it
-// Implement this code into your code and write the CO2 concentration into the file on the SD card
-
-// The sensor signal (pulse width modulation) is coming into PIN 7
-const int pwmpin = 7;
-// The measurement range is (0-5000 ppm CO2)
-const int range = 5000;
-
-int photozellePin = 0;
-
-
-// Setup
-void setup() {
-  // Set PIN7 on input
-  pinMode(pwmpin, INPUT);
-  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
-  // Start serial communication
-  Serial.begin(9600);
-  Serial.println("");
-  Serial.println("Weather station");
-  while (!Serial) {
-    // Waits for the serial port to be ready
-  }
-  if ( !SD.begin(chipSelect) )
-  {
-    Serial.println("SD card missing or defect.");
-    return;
-  }
-  Serial.println("SD card correctly initialized.");
-  // Start clock
-  rtc.begin();
-  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
-  // Start T and h sensor module
-  sensor.begin();
-  // Write the header line into the CSV
-  // Create the filename
-  DateTime now = rtc.now();
-  year = now.year();
-  month = now.month();
-  day = now.day();
-  hour = now.hour();
-  minute = now.minute();
-  second = now.second();
-  if ( month < 10 )
-  {
-    filename += "0";
-  }
-  filename += month;
-  if ( day < 10 )
-  {
-    filename += "0";
-  }
-  filename += day;
-  if ( hour < 10 )
-  {
-    filename += "0";
-  }
-  filename += hour;
-  if ( minute < 10 )
-  {
-    filename += "0";
-  }
-  filename += minute;
-  filename += ".txt";
-  Serial.print("Filename: ");
-  Serial.println(filename);
-  // filename = "hallo.txt";
-  // Now write the header
-  File datafile = SD.open(filename, FILE_WRITE);
-  if(datafile)
-  {
-    Serial.println("Header written.");
-    datafile.println("dateTime,lightIntensity,temperature,relativeHumidity,ppmCO2");
-  }
-  datafile.close();
-}
-
-// The main program
-void loop() {
-  lightIntensity = analogRead( photozellePin ); // Get the signal from the phototransistor
-  temperature = sensor.readTemperature();
-  relativeHumidity = sensor.readHumidity();
-  // Measure the CO2 concentration width with the function shown below the loop function
-  ppmCO2 = readCO2PWM();
-  DateTime now = rtc.now();
-  year = now.year();
-  month = now.month();
-  day = now.day();
-  hour = now.hour();
-  minute = now.minute();
-  second = now.second();
-
-  // Print date and time to serial port
-  Serial.print(year, DEC);
-  Serial.print("-");
-  if ( month < 10 )
-  {
-    Serial.print("0");
-  }
-  Serial.print(month, DEC);
-  Serial.print("-");
-  if ( day < 10 )
-  {
-    Serial.print("0");
-  }
-  Serial.print(day, DEC);
-  Serial.print(" ");
-  if ( hour < 10 )
-  {
-    Serial.print("0");
-  }
-  Serial.print(hour, DEC);
-  Serial.print(":");
-  if ( minute < 10 )
-  {
-    Serial.print("0");
-  }
-  Serial.print(minute, DEC);
-  Serial.print(":");
-  if ( second < 10 )
-  {
-    Serial.print("0");
-  }
-  Serial.print(second, DEC);
-  Serial.print(",");
-  Serial.print( lightIntensity );
-  Serial.print(",");
-  Serial.print( temperature, 2 );
-  Serial.print(",");
-  Serial.print( relativeHumidity, 2 );
-  Serial.print(",");
-  Serial.println(ppmCO2);
-
-  // Now write things onto the SD card
-  File datafile = SD.open(filename, FILE_WRITE);
-  if (datafile) // Check if the file exists
-  {
-    Serial.println("Writing to file.");
-    datafile.print(year, DEC);
-    datafile.print("-");
-    if ( month < 10 )
-    {
-      datafile.print("0");
-    }
-    datafile.print(month, DEC);
-    datafile.print("-");
-    if ( day < 10 )
-    {
-      datafile.print("0");
-    }
-    datafile.print(day, DEC);
-    datafile.print(" ");
-    if ( hour < 10 )
-    {
-      datafile.print("0");
-    }
-    datafile.print(hour, DEC);
-    datafile.print(":");
-    if ( minute < 10 )
-    {
-      datafile.print("0");
-    }
-    datafile.print(minute, DEC);
-    datafile.print(":");
-    if ( second < 10 )
-    {
-      datafile.print("0");
-    }
-    datafile.print(second, DEC);
-    datafile.print(",");
-    datafile.print( lightIntensity );
-    datafile.print(",");
-    datafile.print( temperature, 2 );
-    datafile.print(",");
-    datafile.print( relativeHumidity, 2 );
-    datafile.print(",");
-    datafile.println(ppmCO2);
-  }
-  datafile.close();
-  delay(100);
-}
-
-
-// This function reads the PWM signal width on PIN7
-int readCO2PWM() {
-  unsigned long th; // This is the width of the PWM signal in microseconds, maximum length is 1004 ms = 1004000 us
-  int ppm_pwm = 0;
-  float pulsepercent;
-  // Wait for the measurement value
-  do {
-    th = pulseIn(pwmpin, HIGH, 2500000) / 1000; // Gives the witdh in milliseconds (division by 1000)
-    // Pulse length in %
-    float pulsepercent = th / 1004.0;
-    // CO2 concentration in ppm
-    ppm_pwm = range * pulsepercent;
-  } while (th == 0);
-  // Return the measured value to the main loop
-  return ppm_pwm;
-}