Monitoring of Hydroponic with IoT System

#include <ESP8266WiFi.h>;
#include <WiFiClient.h>;
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <Wire.h>
#define DHTPIN 13 
#define rly 15

LiquidCrystal_I2C lcd(0x3F, 16, 2);

String apiKey = "9E66C0QZECQTFFCY";                            //fill in the api key from thingspeak
const char* ssid = "(1 + sqrt(5)) / 2";                        //fill in your wifi name
const char* password = "1.6180339887498948482045868343656";    //fill in your wifi password
const char* server = "api.thingspeak.com";

int SensorPin = A0;                     //Sensor Pin Connected at A0 Pin
int Enable1 = 0;
int Enable2 = 2;

int SensorValue1 = 0; 
int SensorValue2 = 0; 

DHT dht(DHTPIN, DHT22); 
WiFiClient client;


void setup(){
 
Serial.begin(115200);
delay(10);
dht.begin();
lcd.begin();
 
WiFi.begin(ssid, password);               // Connect to WiFi network

while (WiFi.status() != WL_CONNECTED) {
delay(500);
}

Serial.println("WiFi connected");
Serial.println();

pinMode(Enable1,OUTPUT);
pinMode(Enable2,OUTPUT);
pinMode(rly,OUTPUT);
}
 
 
 
void loop(){

//DHT22

float h = dht.readHumidity();
float t = dht.readTemperature();

if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;

delay(1000);
}

Serial.print("Temperature:      ");
Serial.print(t);
Serial.print(" degrees Celcius ");
Serial.println();

Serial.print("Humidity:         ");
Serial.print(h);
Serial.print("%");
Serial.println();

//Sensor

   digitalWrite(Enable1, HIGH);
   SensorValue1 = analogRead(SensorPin);
   Serial.print("Water Quality:  ");
   Serial.println(SensorValue1);
   digitalWrite(Enable1, LOW);
   delay(500);
   digitalWrite(Enable2, HIGH);
   SensorValue2 = analogRead(SensorPin);
   Serial.print("Light intensity:  ");
   Serial.println(SensorValue2);
   digitalWrite(Enable2, LOW);
   delay(500);


//thingspeak

if (client.connect(server,80)) {   //  api.thingspeak.com
String postStr = apiKey;
postStr +="&field1=";
postStr += String(t);
postStr +="&field2=";
postStr += String(h);
postStr +="&field3=";
postStr += String(SensorValue1);
//postStr +="&field7=";
postStr += "\r\n\r\n\r\n\r\n\r\n\r\n\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\n\n\n\n\n\n");
client.print(postStr);

  if(SensorValue2>500){
    digitalWrite(rly,HIGH);
  }else{
    digitalWrite(rly,LOW);
  }
}
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Temp= ");
  lcd.print(t);
  lcd.print(" C");
  lcd.setCursor(0,1);
  lcd.print("Water= ");
  lcd.print(SensorValue1);
  lcd.noBlink();
  delay(5000);
  lcd.noBlink();
  delay(5000);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Hum= ");
  lcd.print(h);
  lcd.print(" %");
  lcd.setCursor(0,1);
  lcd.print("Water= ");
  lcd.print(SensorValue1);

   

delay(10000);
}