/*
  Complete project details: https://RandomNerdTutorials.com/esp32-https-requests/
  
  const char* ssid = "Wokwi-GUEST";
  const char* password = "";
*/

/*
 *  HTTP over TLS (HTTPS) example sketch
 *
 *  This example demonstrates how to use
 *  WiFiClientSecure class to access HTTPS API.
 *  We fetch and display the status of
 *  esp8266/Arduino project continuous integration
 *  build.
 *
 *  Created by Ivan Grokhotkov, 2015.
 *  This example is in public domain.
 *  
 *.  Code explained and commented by Sachin Soni
 *  
 *   For tutorial of this code, watch out this video
 *   https://youtu.be/dsmMzS3Qvg0
 *  
 *  visit 
 *  http://www.techiesms.com
 *  for IoT project tutorials.
 *  
 *        #techiesms
 *  explore | learn | share
 *  
 *  ref: https://www.youtube.com/watch?v=dsmMzS3Qvg0    thank you
 *  
 */

#include <WiFi.h>
#include <WiFiClientSecure.h>

#include "DHT.h"
DHT dht(15, DHT11);

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// const char* ssid = "MAHAKAL"; // Name of the Host
// const char* password = "sateri456"; // Password of the corresponding Host


//const char* ssid = "WeWorkLabsHackathon"; // Name of the Host
//const char* password = "Hackathon2023!";

const char* ssid = "Wokwi-GUEST";
const char* password = "";


const char* host = "agihomesensorapi.atharvapawar.repl.co";           
// Server from which data is to be fetched

const int httpsPort = 443; // Default port for HTTPS 
// Use web browser to view and copy
// SHA1 fingerprint of the certificate
const char* fingerprint = "82 68 CF 6A D5 98 13 41 53 A9 97 D9 25 18 76 87 9B 78 72 1D";      //replit.co



//Edge computing
#define MoisensorPin 14
int MoisensorValue = 0;  
int limit = 55; 


#define dhtPin 15

#define ch1_Pin 18
#define ch2_Pin 19


//"/sensorvalue?
// a_id=acc1243
//&sec_code=agihome123
//&smv=45
//&ps=425
//&temp=4225
//&hum=4250
//&ap1=425


//const char* sendData[7] = {"acc1243", "agihome123", "45", "1", "37", "89", "0"}; // dummy data initialization

String account_id = "acc1243";
String secret_code= "agihome123";

int pump = 0;
float temp = 0;
float hum= 0;
int appli_2 = 0;


//sendData[0] = accountid
//sendData[1] = secret code
//sendData[2] = soil moisture data
//sendData[3] = Pump Status(bool)
//sendData[4] = Temperature
//sendData[5] = Humidity
//sendData[6] = application 1(bool)

void displayData(){
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  // Display static text

  display.setCursor(0, 10);
  display.println("Soil Moisture:  "+ String(MoisensorValue));

  display.setCursor(0, 30);
  display.println("Temp:  "+ String(temp));

  display.setCursor(0, 50);
  display.println("Hum:  "+ String(hum));
  display.display(); 
}


void sendDATA(){
 
  WiFiClientSecure client;  // Use WiFiClientSecure class to create client instance
  client.setInsecure();
  Serial.print("connecting to ");
  Serial.println(host);
  if (!client.connect(host, httpsPort)) { 
    // establishing connection with the server(api.github.com) at port 443
    Serial.println("connection failed");
    return; 
    // this line will return the function to the starting of void setup()
  }

 
  //  String url = "/sensors/get?N=" + String(random(150, 200)) + "&P=" + String(random(190, 220)) + "&K=" + String(random(150, 200)) + "&temperature=" + String(random(30, 40)) + "&humidity=" + String(random(80, 90)) + "&moisture=" + String(random(90, 100)) + "&wind_speed=" + String(random(50, 70)) + "&altitude=" + String(random(10, 40)) + "&light=" + String(random(23, 35)) + "&rain=" + String(random(200, 300)) + "&wind_direction=" + String(random(0, 1)) + "&pump=" + String(random(0, 1)) + "&earth_x=" + String(random(30, 81)) + "&earth_y=" + String(random(30, 81)) + "&earth_z=" + String(random(30, 81)); 

  String url = "/sensorvalue?a_id=acc1243&sec_code=agihome123&smv="+ String(MoisensorValue) + "&ps=" + String(pump) + "&temp=" + String(temp) + "&hum=" + String(hum) + "&ap1=" + String(appli_2);
  //address from which we need to get the data inside the server.
  
  Serial.print("requesting URL: ");
  Serial.println(url);

  client.print(String("GET ") + url + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" +
               "User-Agent: BuildFailureDetectorESP8266\r\n" +
               "Connection: close\r\n\r\n");
  /*
   * GET /repos/esp8266/Arduino/commits/master/status HTTP/1.1
   * Host : api.github.com
   * User-Agent : BuildFailureDetectorESP8266
   * Connection : close
   */

  Serial.println("request sent");
  while (client.connected()) { // until the client is connected, read out the response
    String line = client.readStringUntil('\n');
    if (line == "\r") {
      Serial.println("headers received");
      break;
    }
  }
  String line = client.readStringUntil('\n');
  Serial.println("reply was:");
  Serial.println("==========");
  Serial.println(line);
  Serial.println("==========");
  Serial.println("closing connection");
  

}

                         
void setup() {
  Serial.begin(115200); //default baud rate for esp32

  // Wifi connection code
  Serial.println();Serial.print("connecting to ");Serial.println(ssid);
  WiFi.begin(ssid, password); // establish connection with mentioned Host
  while (WiFi.status() != WL_CONNECTED) {delay(500);Serial.print(".");}
  Serial.println("");Serial.println("WiFi connected");Serial.println("IP address: ");
  Serial.println(WiFi.localIP()); // Print out the Local IP assigned by the router to ESP8266

  // pin declaration
  dht.begin();
  pinMode(ch1_Pin, OUTPUT);
  pinMode(ch2_Pin, OUTPUT);
  digitalWrite(ch1_Pin, LOW);
  digitalWrite(ch2_Pin, LOW);

  // Oled config
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  delay(2000);
}

void loop() {
  
  //Read Soil moisture Sensor value
  MoisensorValue = analogRead(MoisensorPin);                      //sprintf(buffer, "Soil Moisture Raw: %d", MoisensorValue);Serial.println(buffer);
  MoisensorValue = map(MoisensorValue, 0, 1023, 0, 100);          // 0 to 100%
  MoisensorValue    = (100-MoisensorValue) - 1;                      // inverse the value
  
  //controll Pump 
  if (MoisensorValue<limit){digitalWrite(ch1_Pin, LOW);   pump = 1;   }
  else {                    digitalWrite(ch1_Pin, HIGH);  pump = 0;   }

  
  temp = dht.readTemperature();
  hum = dht.readHumidity();

  // application - 2 : Lamp for indoor plant pot
  appli_2 = 0;
  digitalWrite(ch2_Pin, LOW);
  
  sendDATA();
  displayData();
  

  delay(40000); //40sec
}

//  String url = "/sensorvalue?a_id=acc1243&sm="+ String(sendData[0]) + "&ps=" + String(sendData[1]) + "&N=" + String(sendData[2]) + "&P=" + String(sendData[3]) + "&K=" + String(sendData[4]) + "&ph=" + String(sendData[5] + "&temp=" + String(sendData[6]) + "&hum=" + String(sendData[7]) 

// + "&N=" + String(N) + "&P=" + String(P) + "&K=" + String(K);

// S = 0
// P = 1
// N = 100
// P = 35
// K = 498
// p = 8
// T = 30
// H = 76
// -------------Gatway Node-------

//sendData[0] = N1 soil moisture data
//sendData[1] = N1 pump status
//sendData[2] = N
//sendData[3] = P
//sendData[4] = K
//sendData[5] = pH data
//sendData[6] = Temperature
//sendData[7] = Humidity