#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include "ThingSpeak.h"

const char* WIFI_SSID = "Wokwi-GUEST"; // Replace with your Wi-Fi name
const char* WIFI_PASS = ""; // Replace with your Wi-Fi password
const int myChannelNumber = 2382004;
const char* myApikey = "RV8UIUMXWHVEFV13"; // Replace with your ThingSpeak API Key
const char* server = "api.thingspeak.com";

LiquidCrystal_I2C lcd(0x27, 20, 4);
WiFiClient client;

float t;
float pH;
float nh3;

long readT() {
  long t = random(1700, 2900) * 0.01;
  return t;
}

long readNh3() {
  long nh3 = random(90, 5000) * 0.01;
  return nh3;
}

long readPh() {
  long pH = random(400, 1000) * 0.01;
  return pH;
}

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.print("Aqua Sensor");
  delay(3000);
  lcd.clear();

  WiFi.begin(WIFI_SSID, WIFI_PASS);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
}

void loop() {
  ThingSpeak.begin(client);

  t = readT();
  pH = readPh();
  nh3 = readNh3();

  Serial.println("Data from AQUA SENSORS");
  Serial.print("Temp : ");
  Serial.println(t, 1);
  Serial.print("pH : ");
  Serial.println(pH, 1);
  Serial.print("NH3 : ");
  Serial.println(nh3, 1);

  lcd.setCursor(0, 0);
  lcd.print("Temp");
  lcd.setCursor(0, 1);
  lcd.print(t, 1);
  lcd.setCursor(6, 0);
  lcd.print("pH");
  lcd.setCursor(6, 1);
  lcd.print(pH, 1);
  lcd.setCursor(11, 0);
  lcd.print("NH3");
  lcd.setCursor(11, 1);
  lcd.print(nh3, 1);

  ThingSpeak.setField(1, t);
  ThingSpeak.setField(2, pH);
  ThingSpeak.setField(3, nh3);

  int status = ThingSpeak.writeFields(myChannelNumber, myApikey);
  if (status == 200) {
    Serial.println("Data sent to ThingSpeak!");
  } else {
  }

  delay(2000);
  lcd.clear();
}