#define BLYNK_TEMPLATE_ID "TMPL6v-8dbHQm"
#define BLYNK_TEMPLATE_NAME "PH value and temperature"
#define BLYNK_AUTH_TOKEN "gKl3ElD5F0dwEDBJHcPUt1fSAWZk-xkm"

#include <OneWire.h>
#include <DallasTemperature.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include "ThingSpeak.h"

#define BLYNK_PRINT Serial

#define ONE_WIRE_BUS 5 // Correct pin for D5

const int LED_PIN = 13;
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2262241;
const char* myApiKey = "SQQYS43N4B9LAPM0";
const char* server = "api.thingspeak.com";

WiFiClient client;

OneWire oneWire1(ONE_WIRE_BUS);
DallasTemperature sensor1(&oneWire1);

BlynkTimer timer;

const int pot1Pin = 33;
const int redPin = 19;
const int greenPin = 18;
const int relayPin = 25;  // Relay connected to GPIO 25

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

void setup() {
  Serial.begin(115200);
  delay(2);
  sensor1.begin();
  delay(20);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(relayPin, OUTPUT);  // Initialize relay pin as OUTPUT
  digitalWrite(relayPin, LOW);  // Ensure relay is initially off

  Blynk.begin(auth, ssid, pass);
  timer.setInterval(1000L, sendSensor);
  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() {
  Blynk.run();
  timer.run();
}

void sendSensor() {
  sensor1.requestTemperatures();
  float temperature1C = sensor1.getTempCByIndex(0);

  if (temperature1C == DEVICE_DISCONNECTED_C) {
    Serial.println("Error: Could not read temperature data");
    Blynk.virtualWrite(V0, "Error");
  } else {
    Blynk.virtualWrite(V0, temperature1C);
    Serial.print("Temperature: ");
    Serial.print(temperature1C);
    Serial.println("C");
  }

  int pot1Value = analogRead(pot1Pin);
  float pHValue = (pot1Value / 4095.0) * 14.0;  // Convert ADC value to pH value
  Blynk.virtualWrite(V2, pHValue);
  Serial.print("pH Value: ");
  Serial.println(pHValue);

  if (pHValue < 7) {
    digitalWrite(greenPin, LOW);
    digitalWrite(redPin, HIGH);
    digitalWrite(relayPin, LOW);  // Turn off the relay
  } else if (pHValue >= 8) {
    digitalWrite(greenPin, HIGH);
    digitalWrite(redPin, LOW);
    digitalWrite(relayPin, LOW);  // Turn off the relay
  } else {
    digitalWrite(greenPin, LOW);
    digitalWrite(redPin, LOW);
    digitalWrite(relayPin, LOW);  // Turn off the relay
  }

  delay(100); // This speeds up the simulation
}