#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#include <WiFi.h>

#include "ThingSpeak.h"

const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2483764;
const char* myApiKey = "SFPVATLNY982GQ9B";
const char* server = "api.thingspeak.com";

WiFiClient client;

int ammoniaSensor = 35;
int h2sSensor = 34;

float ammonia;
float h2s;

int ammoniaControl = 19;

int h2sControl = 15;

int ac,h2sc;
// LCD geometry
const int LCD_COLS = 16;
const int LCD_ROWS = 2;
int status;

#define ledRed 5// Pin für die rote LED am digitalen Pin D11
#define ledGreen 17 // Pin für die gruene LED am digitalen Pin

const int PAUSE = 250;
void setup() {
  Serial.begin(115200);
  Wire.begin(23, 22);
  lcd.init();
  lcd.backlight();
  pinMode(ammoniaControl, OUTPUT);
  pinMode(h2sControl, OUTPUT);
  
  pinMode(ammoniaSensor, INPUT);
  pinMode(h2sSensor, INPUT);
  

  pinMode (ledRed, OUTPUT);
  pinMode (ledGreen, OUTPUT);

  digitalWrite(ledRed, LOW);
  digitalWrite(ledGreen, LOW);
  //Initialise LC bc D
Serial.println("Serial");

  // initalization was successful, the backlight should be on now
  lcd.clear();
  // Print a message to the LCD
  lcd.print("Emission Control");
  lcd.setCursor(0, 1);
  lcd.print("by Chettinad ");
  delay (1000);

  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED){
    delay(1000);
    Serial.println("Wifi not connected");
  
  }
  Serial.println("Wifi connected !");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

}

void loop() {
  Serial.print("Emission Sensor Value:");
  ammonia = analogRead(ammoniaSensor);
  delay(500);
  h2s=analogRead(h2sSensor);
  delay(500);
  
  ammonia = map(ammonia, 0, 4095, 0, 50);
  h2s=map(h2s, 0,4095 , 0, 600);
 

  Serial.println(ammonia);
  Serial.println(h2s);
  
  delay(100);


  mnc(ammonia, ammoniaControl, 25, "Amm-");
  if(ammonia>25){
    ac=1;
  }
  else if(ammonia<25){
    ac=0;
  }
  mnc(h2s, h2sControl, 25, "h2s-");
  if(h2s>25){
    h2s=1;
  }
  else if(h2s<25){
    h2s=0;
  }

  
  ThingSpeak.setField(1,ammonia);
  ThingSpeak.setField(2,h2s);

  ThingSpeak.setField(3,ac);
ThingSpeak.setField(4,h2sc);


lcd.clear();
  // Print a message to the LCD
  lcd.print("Sending to");
  lcd.print("Thingspeak");
  
  
  int x = ThingSpeak.writeFields(myChannelNumber,myApiKey);
  
  
  if(x == 200){
    Serial.println("Data pushed successfull");
    
  }else{
    Serial.println("Push error" + String(x));
  }
  Serial.println("---");

  delay(2000);
  

}





void mnc(int gas,int control,int maxV,const char* text) {
  if (gas > maxV) {
    digitalWrite(control, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, HIGH);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(text);
    lcd.print(gas);
    lcd.print(" | >");
    lcd.print(maxV);
    lcd.print("ppm");
    lcd.setCursor(0, 1);
    lcd.print("CONTROLING");
  
    delay(1000);
  }

  if ( gas < maxV) {
    digitalWrite(control, LOW);
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledRed, LOW);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(text);
    lcd.print(gas);
    lcd.print(" | <");
    lcd.print(maxV);
    lcd.print("ppm");
    lcd.setCursor(0, 1);
    lcd.print("OKAY");
    delay(1000);
  }


}