// Blynk and Wi-Fi credentials
#define BLYNK_TEMPLATE_ID "TMPL2z8v1yiHG"
#define BLYNK_TEMPLATE_NAME "Lagos IOt"
#define BLYNK_AUTH_TOKEN "nRpNiPMBMhAS7vThXIy_UaFhrFWFIuco"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Blynk Credentials
char auth[] = "nRpNiPMBMhAS7vThXIy_UaFhrFWFIuco";
char ssid[] = "Wokwi-GUEST";      
char pass[] = "";                

// Pin Definitions for ESP32
#define ONE_WIRE_BUS 23     // DS18B20 data pin on GPIO23
#define TURBIDITY_PIN 34    // Turbidity sensor analog pin
#define PH_PIN 35          // pH sensor analog pin

// LED Pins
#define RED_LED_PIN 25      // Red LED for temperature
#define YELLOW_LED_PIN 22   // Yellow LED for turbidity
#define GREEN_LED_PIN 21    // Green LED for pH

// Setup OneWire and DallasTemperature instances
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// Blynk virtual pins
#define VIRTUAL_TEMP V8        // Temperature virtual pin
#define VIRTUAL_TURBIDITY V5    // Turbidity virtual pin
#define VIRTUAL_PH V6           // pH virtual pin

void setup() {
  // Initialize Serial Monitor
  Serial.begin(9600);
  // Start DS18B20 sensor
  sensors.begin();
  // Configure LED pins as outputs
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  // Connect to WiFi and Blynk
  Serial.print("Connecting to Wi-Fi: ");
  Serial.println(ssid);
  Blynk.begin(auth, ssid, pass);
  Serial.println("Setup complete. Monitoring started.");
}

void loop() {
  // Blynk handling
  Blynk.run();
  // Read temperature from DS18B20
  sensors.requestTemperatures();
  float temperature = sensors.getTempCByIndex(0);
  if (temperature == -127.0) {
    temperature = random(20, 35); // Simulated temperature
  }

// Simulate or read turbidity value
  int turbidity = analogRead(TURBIDITY_PIN); // Read from turbidity pin
  if (turbidity == 0) {
    turbidity = random(500, 750); // Simulated turbidity (650–750 NTU)
  } else {
    turbidity = map(turbidity, 0, 4095, 0, 1000); // Map raw analog value to NTU range
  }

  // Simulate or read pH value
  int pH = analogRead(PH_PIN); // Read from pH pin
  if (pH == 0) {
    pH = random(7, 10); // Simulated pH (7–10)
  } else {
    pH = map(pH, 0, 4095, 0, 14); // Map raw analog value to pH range
  }

  // Print values to Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C, Turbidity: ");
  Serial.print(turbidity);
  Serial.print(" NTU, pH: ");
  Serial.println(pH);

  // Update Blynk app with sensor values
  Blynk.virtualWrite(VIRTUAL_TEMP, temperature);  // Send temperature to V8
  Blynk.virtualWrite(VIRTUAL_TURBIDITY, turbidity);  // Send turbidity to V5
  Blynk.virtualWrite(VIRTUAL_PH, pH);  // Send pH to V6
  
  // LED Control Logic
  if (temperature > 25) { // High temperature threshold
    digitalWrite(RED_LED_PIN, HIGH);
    Serial.println("Red LED ON: High Temperature");
  } else {
    digitalWrite(RED_LED_PIN, LOW);
  }
  if (turbidity > 600) { // High turbidity threshold
    digitalWrite(YELLOW_LED_PIN, HIGH);
    Serial.println("Yellow LED ON: High Turbidity");
  } else {
    digitalWrite(YELLOW_LED_PIN, LOW);
  }
  if (pH > 7) { // High pH threshold
    digitalWrite(GREEN_LED_PIN, HIGH);
    Serial.println("Green LED ON: High pH");
  } else {
    digitalWrite(GREEN_LED_PIN, LOW);
  }
  delay(1000); // Delay before the next loop
}