Agritech code.ino

#include <SoftwareSerial.h>
SoftwareSerial gprsSerial(4,5);
 #include <String.h>
float moisture_percentage,h,t, sa;
#include <AltSoftSerial.h>
#include <DHT.h> 
 #define DHTPIN A0
DHT dht(DHTPIN, DHT11);
//RO to pin 8 & DI to pin 9 when using AltSoftSerial
#define RE 6
#define DE 7
 
const byte nitro[] = {0x01, 0x03, 0x00, 0x1e, 0x00, 0x01, 0xe4, 0x0c};
const byte phos[] = {0x01, 0x03, 0x00, 0x1f, 0x00, 0x01, 0xb5, 0xcc};
const byte pota[] = {0x01, 0x03, 0x00, 0x20, 0x00, 0x01, 0x85, 0xc0};
 
byte values[11];
AltSoftSerial mod;
 byte val1;
  byte val2;
 byte val3;
void setup() {
  Serial.begin(9600);
  mod.begin(9600);
   dht.begin();
  pinMode(RE, OUTPUT);
  pinMode(DE, OUTPUT);
 
  // put RS-485 into receive mode
  digitalWrite(DE, LOW);
  digitalWrite(RE, LOW);
  gprsSerial.begin(9600);             
}
 void loop() {
     float h = dht.readHumidity();
     
     float t = dht.readTemperature(); 
      delay(250);
      Serial.println(" %");    
      Serial.print("Temperature = ");
      Serial.print(t);
       Serial.println(" °C");
      Serial.print("Humidity = ");
      Serial.print(h);
      Serial.println(" %");
      
      float sa= analogRead(A1);
  moisture_percentage = ( 100 - ( (sa/1023.00) * 100 ) );
  Serial.print("Moisture Percentage = ");
  Serial.print(moisture_percentage);
  Serial.print("%\n\n");
  delay(250);
  Serial.print("Nitrogen: ");
  val1 = nitrogen();
  Serial.print(" = ");
  Serial.print(val1);
  Serial.println(" mg/kg");
  delay(250);
 
  Serial.print("Phosphorous: ");
    val2 = phosphorous();
  Serial.print(" = ");
  Serial.print(val2);
  Serial.println(" mg/kg");
  delay(250);
 
  Serial.print("Potassium: ");
    val3 = potassium();
  Serial.print(" = ");
  Serial.print(val3);
  Serial.println(" mg/kg");
  Serial.println();
 delay(250);

if (gprsSerial.available())
    Serial.write(gprsSerial.read());
 
  gprsSerial.println("AT");
  delay(10);
 
  gprsSerial.println("AT+CPIN?");
  delay(10);
 
  gprsSerial.println("AT+CREG?");
  delay(10);
 
  gprsSerial.println("AT+CGATT?");
  delay(100);
 
  gprsSerial.println("AT+CIPSHUT");
  delay(1000);
 
  gprsSerial.println("AT+CIPSTATUS");
  delay(20);
 
  gprsSerial.println("AT+CIPMUX=0");
  delay(2000);
 
  ShowSerialData();
 
  gprsSerial.println("AT+CSTT=\"airtelgprs.com\"");//start task and setting the APN,
  delay(100);
 
  ShowSerialData();
 
  gprsSerial.println("AT+CIICR");//bring up wireless connection
  delay(300);
 
  ShowSerialData();
 
  gprsSerial.println("AT+CIFSR");//get local IP adress
  delay(200);
 
  ShowSerialData();
 
  gprsSerial.println("AT+CIPSPRT=0");
  delay(300);
 
  ShowSerialData();
  
  gprsSerial.println("AT+CIPSTART=\"TCP\",\"api.thingspeak.com\",\"80\"");//start up the connection
  delay(6000);
 
  ShowSerialData();
 
  gprsSerial.println("AT+CIPSEND");//begin send data to remote server
  delay(4000);
  ShowSerialData();

 String str= "GET https://api.thingspeak.com/update?api_key=NHDI7GPK8UFHHUK9&field1=" +String(t) +"&field2=" + String(h)+ "&field3="+ String(moisture_percentage)+ "&field4=" +String(val1) +"&field5=" +String(val2)+"&field6=" +String(val3);
   delay(4000);
  gprsSerial.println(str);
 
 //begin send data to remote server
 
  delay(4000);
  ShowSerialData();
 
  gprsSerial.println((char)26);//sending
  delay(5000);//waitting for reply, important! the time is base on the condition of internet 
  gprsSerial.println();
 
  ShowSerialData();
 
  gprsSerial.println("AT+CIPSHUT");//close the connection
  delay(100);
  ShowSerialData();
} 
 void ShowSerialData()
{
  while(gprsSerial.available()!=0)
  Serial.write(gprsSerial.read());
  delay(5000); 
   }
byte nitrogen() {
  // clear the receive buffer
  mod.flushInput();
 
  // switch RS-485 to transmit mode
  digitalWrite(DE, HIGH);
  digitalWrite(RE, HIGH);
  delay(1);
 
  // write out the message
  for (uint8_t i = 0; i < sizeof(nitro); i++ ) mod.write( nitro[i] );
 
  // wait for the transmission to complete
  mod.flush();
  
  // switching RS485 to receive mode
  digitalWrite(DE, LOW);
  digitalWrite(RE, LOW);
 
  // delay to allow response bytes to be received!
  delay(200);
 
  // read in the received bytes
  for (byte i = 0; i < 7; i++) {
    values[i] = mod.read();
    Serial.print(values[i], HEX);
    Serial.print(' ');
  }
  return values[4];

}
byte phosphorous() {
  mod.flushInput();
  digitalWrite(DE, HIGH);
  digitalWrite(RE, HIGH);
  delay(1);
  for (uint8_t i = 0; i < sizeof(phos); i++ ) mod.write( phos[i] );
  mod.flush();
  digitalWrite(DE, LOW);
  digitalWrite(RE, LOW);
// delay to allow response bytes to be received!
  delay(200);
  for (byte i = 0; i < 7; i++) {
    values[i] = mod.read();
    Serial.print(values[i], HEX);
    Serial.print(' ');
  }
  return values[4];
}
 
byte potassium() {
  mod.flushInput();
  digitalWrite(DE, HIGH);
  digitalWrite(RE, HIGH);
  delay(1);
  for (uint8_t i = 0; i < sizeof(pota); i++ ) mod.write( pota[i] );
  mod.flush();
  digitalWrite(DE, LOW);
  digitalWrite(RE, LOW);
// delay to allow response bytes to be received!
  delay(200);
  for (byte i = 0; i < 7; i++) {
    values[i] = mod.read();
    Serial.print(values[i], HEX);
    Serial.print(' ');
  }
  return values[4];
}