Alat Ukur Kelembaban Tanah Sawah berbasis IoT

#include <SPI.h>              //Library 
#include <SD.h>               //Library SD CARD
#include <Ethernet.h>         //Library
#include <ESP8266WiFi.h>      

#include <OneWire.h>          //Library Temperature sensor DS18B20

#include <Wire.h>             //Library OLED
#include <Adafruit_GFX.h>     //Library OLED
#include <Adafruit_SSD1306.h> //Library OLED

byte mac[]= { 0xA1, 0x37, 0xA5, 0x11, 0xB1, 0xC3 }; //mac address

//------------------------------------------------------------------------------------------
//START Inisialisasi OLED
//------------------------------------------------------------------------------------------

#define OLED_RESET 0 //GPIO 0
Adafruit_SSD1306 display(OLED_RESET);

#define NUMFLAKES 10
#define XPOS 0
#define YPOS 1
#define DELTAY 2

#define LOGO16_GLCD_HEIGHT 16 
#define LOGO16_GLCD_WIDTH  16
//END Inisialisasi OLED
//------------------------------------------------------------------------------------------

//------------------------------------------------------------------------------------------
//START Setting API ThingSpeak
//------------------------------------------------------------------------------------------

String apiKey = "OA0WDKFW6QNGA5Z3";  
const char* ssid = "LAB_TE";
const char* password = "innovation";
const char* server = "api.thingspeak.com";
WiFiClient client;
//END ThingSpeak
//------------------------------------------------------------------------------------------

//------------------------------------------------------------------------------------------
//Inisialisasi PORT I/O dan Default Nilai Sensor
int SensorTerendam = D0;    // Sensor dicelupkan di air
int LEDKering = D5;         // Hijau
int LEDBasah = D6;          // Kuning
int LEDBanjir = D7;         // Merah
int Buzzer = D8;            // Buzzer Alarm
int RH = 0;                 // inisial tipe integer (bilangan bulat) relative humidity
int AirValue = 520;         // nilai udara
int WaterValue = 260;       // nilai air
int OverValue = 720;        // nilai ketika sensor tidak tertanam
const int sleepSeconds = 5; 
const int chipSelect = A0;  // constanta integer u/ analog port yg terhubung ke sensor kelembaban

//------------------------------------------------------------------------------------------
//START Temperature Sensor DS18B20
//------------------------------------------------------------------------------------------

OneWire  ds(D3);  // on pin D3 (a 4.7K resistor pull up is necessary)
//END DS18B20

void setup() 
{
  Serial.begin(9600); //open serial port, set the baud rate as 9600 atau 115200 bps
  
  //Inisialisasi WIFI START
  WiFi.begin(ssid, password);
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay (500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi Connected");
  //END WIFI
  
  //START OLED
  //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 0x3C (for the 64x48)  
  
  display.clearDisplay();       //bersihkan oled
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setTextColor(WHITE);  //pilih warna putih
  display.setCursor(35,10);     //set lokasi hurup "setCursor(x,y)"
  display.print("Moisture");    //tampilkan "Moisture" di koordinat 35,10
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(35,20);     //set lokasi hurup "setCursor(x,y)"
  display.print("Module IoT");  //tampilkan "Module IoT" di koordinat 35,20
  display.display();            //tampilkan
  display.clearDisplay();       //bersihkan oled
  delay(1000);                  //delay 1 detik
  //END OLED

  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(90,20);     //set lokasi hurup "setCursor(x,y)"
  display.print("K");           //kering 
  display.display();            //tampilkan
  
  //START OLED C1520201010 | Arienda NA
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setTextColor(WHITE);  //pilih warna putih
  display.setCursor(35,10);     //set lokasi hurup "setCursor(x,y)"
  display.print("1520201010");  //tampilkan "1520201010" di koordinat 35,10
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(35,20);     //set lokasi hurup "setCursor(x,y)"
  display.print("Arienda NA");  //tampilkan "Arienda NA" di koordinat 35,20
  display.display();            //tampilkan
  display.clearDisplay();       //bersihkan oled
  delay(1000);                  //delay 1 detik
  //END OLED

  //START OLED UMTAS 2019 | Tasikmalaya
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setTextColor(WHITE);  //pilih warna putih
  display.setCursor(35,10);     //set lokasi hurup "setCursor(x,y)"
  display.print("UMTAS 2019");  //tampilkan "UMTAS 2019" di koordinat 35,10
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(35,20);     //set lokasi hurup "setCursor(x,y)"
  display.print("Tasikmalaya"); //tampilkan "Tasikmalaya" di koordinat 35,20
  display.display();            //tampilkan
  display.clearDisplay();       //bersihkan oled
  delay(1000);                  //delay 1 detik
  //END OLED

  //START OLED Budhi | Prayoga
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setTextColor(WHITE);  //pilih warna putih
  display.setCursor(35,10);     //set lokasi hurup "setCursor(x,y)"
  display.print("Budhi Pra-");  //tampilkan "UMTAS 2019" di koordinat 35,10  
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(35,20);     //set lokasi hurup "setCursor(x,y)"
  display.print("yoga,M.Eng");  //tampilkan "UMTAS 2019" di koordinat 35,20  
  display.display();            //tampilkan
  display.clearDisplay();       //bersihkan oled
  delay(1000);                  //delay 1 detik
  //END OLED
  
  
  pinMode(BUILTIN_LED, OUTPUT);   // make led on wemos D1 Mini Pro as Output
  pinMode(LEDKering, OUTPUT);     // make led pin d5 as output pin
  pinMode(LEDBasah, OUTPUT);      // make led pin d6 as output pin
  pinMode(LEDBanjir, OUTPUT);     // make led pin d7 as output pin
  pinMode(Buzzer, OUTPUT);        // make led pin d8 as output pin

  //Data Logger Start
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  Serial.println("Inisialisasi SD card...");
  // see if the card is present and can be initialized:
  if (!SD.begin(chipSelect)) 
  {
    //tampilkan diserial monitor 
    Serial.println("+-----------------------+");
    Serial.println("|kartu tidak terdeteksi.|");
    Serial.println("|masukan sd card........|");
    Serial.println("+-----------------------+");
    
    for (int i = 0; i < 200; i++) //built-in led biru flash blink sebanyak 50x
      {
        digitalWrite(BUILTIN_LED, LOW);   // BUILT-IN LED LOW = ON
        digitalWrite(Buzzer, HIGH);       // BUZZER ON
        delay(25);                        // Delay 1/2 detik
        digitalWrite(BUILTIN_LED, HIGH);  // BUILT-IN LED HIGH = OFF
        digitalWrite(Buzzer, LOW);        // BUZZER OFF
        delay(25);                        // Delay 1/2 detik
        
        //START OLED
        display.clearDisplay();       //bersihkan oled
        display.setTextSize(0);       //pilih ukuran text 0 default
        display.setTextColor(WHITE);  //pilih warna putih
        display.setCursor(45,10);     //set lokasi hurup "setCursor(x,y)"
        display.print("MASUKAN");     //tampilkan "MASUKAN" di koordinat 35,10  
        display.setTextSize(0);       //pilih ukuran text 0 default
        display.setCursor(35,20);     //set lokasi hurup "setCursor(x,y)"
        display.print("SD CARD...");  //tampilkan "MASUKAN" di koordinat 35,20
        display.display();            //tampilkan
        display.clearDisplay();       //bersihkan oled
        //END OLED
      }
      
    // convert to microseconds
    // ESP.deepSleep(sleepSeconds * 1000000);
    // don't do anything more:
    return;
  }
  Serial.print("data akan disimpan dengan nama Humidity_Data.txt");
  delay(500);
  //Data Logger End
}

void run()
{  
  // put your main code here, to run repeatedly:
  // nilai interval = (520 - 260)/3 = 86,66
  int intervals = (AirValue - WaterValue)/3;
  int val;
  val = analogRead(A0);  //connect sensor to Analog 0
  String dataString = "";
  dataString += String(val);
  RH = (convertToPercent(val)) - 32;
  float voltage = val * (3.2 / 1023.0);

  //START OLED
  display.clearDisplay();       //bersihkan oled
  display.setTextColor(WHITE);  //pilih warna putih
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(35,10);     //set lokasi hurup "setCursor(x,y)"
  display.print("Moist: ");     //tampilkan "Moist: " di koordinat 35,10
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(72,10);     //set lokasi hurup "setCursor(x,y)"
  display.print(val);           //tampilkan nilai A0 dari hasil pembacaan sensor
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(35,20);     //set lokasi hurup "setCursor(x,y)"
  display.print("RH: ");        //tampilkan "RH: " di koordinat 35,20
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(53,20);     //set lokasi hurup "setCursor(x,y)"
  display.print(RH);            //tampilkan nilai algoritma RH dari hasil perhitungan
  display.setTextSize(0);       //pilih ukuran text 0 default
  display.setCursor(75,20);     //set lokasi hurup "setCursor(x,y)"
  display.print("%");           //tampilkan "%" di koordinat 75,20
  display.display();            //tampilkan
  //END OLED
  
  //START Temperature Sensor DS18B20
  byte i;
  byte present = 0;
  byte type_s;
  byte data[12];
  byte addr[8];
  float celsius, fahrenheit;

  if ( !ds.search(addr)) 
  {
    ds.reset_search();
    delay(250);
    return;
  }
  
  if (OneWire::crc8(addr, 7) != addr[7]) 
  {
      Serial.println("CRC is not valid!");
      return;
  }
  Serial.println();
 
  // the first ROM byte indicates which chip
  switch (addr[0]) 
  {
    case 0x10:
      type_s = 1;
      break;
    case 0x28:
      type_s = 0;
      break;
    case 0x22:
      type_s = 0;
      break;
    default:
      Serial.println("Device is not a DS18x20 family device.");
      return;
  } 
  ds.reset();           // reset
  ds.select(addr);      // pilih address
  ds.write(0x44, 1);    // start conversion, with parasite power on at the end  
  delay(500);          // delay 1 detik
  present = ds.reset(); // reset
  ds.select(addr);      // pilih address 
  ds.write(0xBE);       // Read Scratchpad
  //END DS18B20

  //START Temperature Sensor DS18B20
    for ( i = 0; i < 9; i++) 
    {           
      data[i] = ds.read();
    }
    // Convert the data to actual temperature
    int16_t raw = (data[1] << 8) | data[0]; // Register Format 8 Bit 
    // S = 0 (Positif) dan S = 1 (Negatif)
    if (type_s) // S for "Sign Bit" : mengindikasikan temperature positif atau negatif 
    {
      raw = raw << 3; // 9 bit resolution default, artinya R0 = 0 dan R1 = 0
      // maka maximum conversion time nya dalah 93.75ms (refers to DS18B20 datasheet page 9)
      if (data[7] == 0x10) {
        raw = (raw & 0xFFF0) + 12 - data[6];
      }
    } 
    else 
    {
      byte cfg = (data[4] & 0x60);
      if (cfg == 0x00) raw = raw & ~7;      // 9 bit resolution, 93.75 ms
      else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
      else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
   
    }
    //Algoritma konversi suhu dari celcius ke fahrenheit
    celsius = (float)raw / 16.0;
    fahrenheit = celsius * 1.8 + 32.0;
    //END Temperature Sensor
        
    //START OLED
    display.clearDisplay();
    display.setTextColor(WHITE); display.setTextSize(0); display.setCursor(35,10); display.print("T= ");
    display.setTextSize(0); display.setCursor(50,10); display.print(celsius); 
    display.setTextSize(0); display.setCursor(85,10); display.print("C");
    display.setTextSize(0); display.setCursor(35,20); display.print("F= ");
    display.setTextSize(0); display.setCursor(50,20); display.print(fahrenheit);
    display.display();
    display.clearDisplay();
    delay(500);
    //END OLED

  //Terendam Air
  //jika nilai sensor (val) lebih dari 260 dan kurang dari (260 + 86,66)
  //berarti nilai val diantara 260 - 346,66 maka dikatakan sensor terendam air
  //toleransi error plus minus 3 (hanya kondisi ketika terendam air)
  if(val > WaterValue && val < (WaterValue + intervals))
  {
    //display.setTextSize(0);         //pilih ukuran text 0 default
    //display.setCursor(90,20);       //set lokasi hurup "setCursor(x,y)"
    //display.print("A");             //terendam air dan tidak memungkinkan u/ berubah kering dalam waktu singkat
    //display.display();              //tampilkan
    digitalWrite(BUILTIN_LED, HIGH);  //off
    digitalWrite(LEDKering, HIGH);    //off
    digitalWrite(LEDBasah, HIGH);     //off
    digitalWrite(LEDBanjir, LOW);     //on
    //tampilkan di serial monitor
    Serial.println("");
    Serial.print("Nilai Sensor : ");
    Serial.println(val);            //nilai yang terbaca oleh sensor
    Serial.print("Kelembaban : ");  //tampilkan text "Kelembaban"
    Serial.print(RH);               //nilai relative humidity
    Serial.println("%");            //tampilkan text "percent / %"
    //delay(500);                     //delay 0.5 detik
    Serial.print("T = ");           // tampilkan text "T" u/ Temperature
    Serial.print(celsius);          // Tampilkan nilai suhu dalam celcius
    Serial.print(" ⁰C | ");         // tampilkan text "derajat dalam celcius"
    Serial.print(fahrenheit);       // tampilkan nilai suhu dalam fahrenheit
    Serial.println(" ⁰F ");         // tampilkan text "derajat dalam satuan fahrenheit"
    Serial.println("Banjir, Merah");
    Serial.print("Tegangan Sensor Humidity: ");
    Serial.println(voltage);
    
    //START OLED
    display.clearDisplay();
    display.setTextColor(WHITE);
    display.setTextSize(0); display.setCursor(35,10); display.print("Sensor ter");
    display.setTextSize(0); display.setCursor(35,20); display.print("rendam air");
    display.display();
    display.clearDisplay();
    delay(500);
    //END OLED 
  }
  
  //BASAH
  //jika nilai sensor (val) lebih dari (260 + 86,66) dan kurang dari (520 - 86,66)
  //berarti nilai val diantara 347 - 433 maka dikatakan sawah basah 
  //toleransi error plus minus 3 (hanya kondisi ketika basah)
  else if(val > (WaterValue + intervals) && val < (AirValue - intervals))
  {
    digitalWrite(BUILTIN_LED, HIGH);    //off
    digitalWrite(LEDKering, HIGH);      //off
    digitalWrite(LEDBasah, LOW);        //on
    digitalWrite(LEDBanjir, HIGH);      //off
    digitalWrite(Buzzer, LOW);          //on
    //tampilkan di serial monitor
    Serial.println("");
    Serial.print("Nilai Sensor : ");
    Serial.println(val);            //nilai yang terbaca oleh sensor
    Serial.print("Kelembaban : ");  //tampilkan text "Kelembaban"
    Serial.print(RH);               //nilai relative humidity
    Serial.println("%");            //tampilkan text "percent / %"
    //delay(500);                   //delay 0.5 detik
    Serial.print("T = ");           // tampilkan text "T" u/ Temperature
    Serial.print(celsius);          // Tampilkan nilai suhu dalam celcius
    Serial.print(" ⁰C | ");         // tampilkan text "derajat dalam celcius"
    Serial.print(fahrenheit);       // tampilkan nilai suhu dalam fahrenheit
    Serial.println(" ⁰F ");         // tampilkan text "derajat dalam satuan fahrenheit"
    Serial.print("Basah, Kuning");
    Serial.print("Tegangan Sensor Humidity: ");
    Serial.println(voltage);
    
    //START OLED
    display.clearDisplay();
    display.setTextColor(WHITE);
    display.setTextSize(0); display.setCursor(51,10); display.print("Tanah");
    display.setTextSize(0); display.setCursor(51,20); display.print("Basah");
    display.display();
    display.clearDisplay();
    delay(500);
    //END OLED
  }

  //KERING
  //jika nilai sensor (val) kurang dari 520 dan dan lebih dari (520 - 86,66)
  //berarti nilai val 433 - 520 maka dikatakan sawah kering 
  else if(val < AirValue && val > (AirValue - intervals)) 
  {
    //digitalWrite(BUILTIN_LED, HIGH);   //off
    digitalWrite(LEDKering, HIGH);       //on
    //digitalWrite(LEDBasah, HIGH);      //off
    //digitalWrite(LEDBanjir, HIGH);     //off       
    digitalWrite(Buzzer, LOW);           //on
    //tampilkan di serial monitor
    Serial.println("");
    Serial.print("Nilai Sensor : ");
    Serial.println(val);            //nilai yang terbaca oleh sensor
    Serial.print("Kelembaban : ");  //tampilkan text "Kelembaban"
    Serial.print(RH);               //nilai relative humidity
    Serial.println("%");            //tampilkan text "percent / %"
    //delay(500);                     //delay 0.5 detik
    Serial.print("T = ");           // tampilkan text "T" u/ Temperature
    Serial.print(celsius);          // Tampilkan nilai suhu dalam celcius
    Serial.print(" ⁰C | ");         // tampilkan text "derajat dalam celcius"
    Serial.print(fahrenheit);       // tampilkan nilai suhu dalam fahrenheit
    Serial.println(" ⁰F ");         // tampilkan text "derajat dalam satuan fahrenheit"
    Serial.println("Kering, Hijau");
    Serial.print("Tegangan Sensor Humidity: ");
    Serial.print(voltage);
    //START OLED
    display.clearDisplay();
    display.setTextSize(0);
    display.setTextColor(WHITE);
    display.setCursor(51,10);
    display.print("Tanah");
    display.setTextSize(0);
    display.setCursor(48,20);
    display.print("Kering");
    display.display();
    display.clearDisplay();
    delay(500);
    //END OLED
  }

  //Sensor Tidak Tertanam pada media sawah atau tanah
  //jika nilai sensor (val) lebih dari 520
  else if(val > AirValue)       
  {
    digitalWrite(Buzzer, HIGH);       //off
    // LED: LOW = on, HIGH = off
      for (int i = 0; i < 5; i++)
      {
        digitalWrite(BUILTIN_LED, LOW);   //on
        //digitalWrite(LEDKering, HIGH);    //off
        //digitalWrite(LEDBasah, HIGH);     //off
        //digitalWrite(LEDBanjir, HIGH);    //off
        digitalWrite(Buzzer, HIGH);       //off
        delay(100);
        digitalWrite(BUILTIN_LED, HIGH);  //off
        //digitalWrite(LEDKering, HIGH);    //off
        //digitalWrite(LEDBasah, HIGH);     //off
        //digitalWrite(LEDBanjir, HIGH);    //off
        digitalWrite(Buzzer, LOW);        //on
        delay(100);
      }
    Serial.println("");
    //tampilkan di serial monitor
    Serial.print("Nilai Sensor : ");
    Serial.println(val);            //nilai yang terbaca oleh sensor
    Serial.print("Kelembaban : ");  //tampilkan text "Kelembaban"
    Serial.print(RH);               //nilai relative humidity
    Serial.println("%");            //tampilkan text "percent / %"
    //delay(500);                     //delay 0.5 detik
    Serial.print("T = ");           // tampilkan text "T" u/ Temperature
    Serial.print(celsius);          // Tampilkan nilai suhu dalam celcius
    Serial.print(" ⁰C | ");         // tampilkan text "derajat dalam celcius"
    Serial.print(fahrenheit);       // tampilkan nilai suhu dalam fahrenheit
    Serial.println(" ⁰F ");         // tampilkan text "derajat dalam satuan fahrenheit"
    Serial.print("Tegangan Sensor Humidity: ");
    Serial.println(voltage);
    Serial.println("sensor_tidak_tertanam");  // nilai sensor lebih dari 520
    //START OLED
    display.clearDisplay();
    display.setTextSize(0);
    display.setTextColor(WHITE);
    display.setCursor(35,10);
    display.print("Sensor tdk");
    display.setTextSize(0);
    display.setCursor(35,20);
    display.print("tertanam !!");
    display.display();
    display.clearDisplay();
    delay(500);
    //END OLED
  }
  else if(val < 50)
    {
      //START OLED
      //display.setFontType(0);
      display.clearDisplay();
      display.setTextSize(0);
      display.setTextColor(WHITE);
      display.setCursor(35,10);
      display.print("SENSOR tdk");
      display.setTextSize(0);
      display.setCursor(35,20);
      display.print("Terhubung");
      display.display();
      display.clearDisplay();
      Serial.println("Sensor tidak terhubung");
      //END OLED
      for (int i = 0; i < 100; i++)
      {
        digitalWrite(BUILTIN_LED, LOW);   //on
        digitalWrite(Buzzer, HIGH);       //off
        delay(300);
        digitalWrite(BUILTIN_LED, HIGH);  //off
        digitalWrite(Buzzer, LOW);        //on
        delay(300);
      }
    }

  //START THINGSPEAK
  if (client.connect(server,80))
    {
      String postStr = apiKey;
           postStr +="&field1=";
           postStr += String(val);        // Nilai Sensor setelah di calibrasi
           postStr +="&field2=";
           postStr += String(RH);         // Nilai Relative Humidity
           postStr +="&field3=";
           postStr += String(voltage);    // Nilai Tegangan yang terbaca di Port A0
           postStr +="&field4=";
           postStr += String(celsius);    // Nilai Suhu (Celcius)
           postStr +="&field5=";
           postStr += String(fahrenheit); // Nilai Suhu (Fahrenheit)
           postStr += "\r\n\r\n"; 
      
      client.print("POST /update HTTP/1.1\n"); 
      client.print("Host: api.thingspeak.com\n"); 
      client.print("Connection: close\n"); 
      client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n"); 
      client.print("Content-Type: application/x-www-form-urlencoded\n"); 
      client.print("Content-Length: "); 
      client.print(postStr.length()); 
      client.print("\n\n"); 
      client.print(postStr);
    }
    client.stop();
    //thingspeak membutuhkan minimal 15 detik jeda waktu untuk update data ke server
    //selang waktu update realnya di thingspeak = 24 detik
    //sedangkan jeda waktu serial print atau beep atau update 10 detik
    //kenapa 10 detik karena 3 digit NIM 010
    Serial.print("Waiting...");    
  for(unsigned int i = 0; i < 15; i++)
  {
    Serial.print(i);
    delay(500);                         
  }                 
  //END THINGSPEAK
  //DateTime Now = rtc.now();
  
  File dataFile = SD.open("Humidity_Data.txt", FILE_WRITE);
  if (dataFile)
  {    
    //Simpan di SD CARD
    dataFile.println("Nilai Sensor : ");
    dataFile.println(dataString);   // Nilai kelembaban yang terbaca oleh sensor
    dataFile.println("Kelembaban : ");
    dataFile.println(RH);           // Relative Humidity dalam percent (%)
    dataFile.println("Temperature : ");
    dataFile.println(celsius);      // Nilai suhu dalam celcius
    dataFile.println(fahrenheit);   // Nilai suhu dalam fahrenheit
    dataFile.println(voltage);  
    dataFile.close();
  }
  // if the file isn't open, pop up an error:
  else 
  {
    Serial.println("error opening datalog.txt");
  }
}

void loop() 
{
  run();
  delay(100);
}

int convertToPercent(int value)
{
  int percentValue = 0;
  percentValue = map(value, 1023, 465, 0, 100);
  return percentValue;
}