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

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial

#define BLYNK_TEMPLATE_ID "TMPL3I5h0zLCP"
#define BLYNK_TEMPLATE_NAME "Quickstart Template"
#define BLYNK_AUTH_TOKEN "N8PDN3Uek8IJep22RT9tsNE-7-wm50A_" 

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

// Pin Definitions
#define LM35_PIN 34    // LM35 sensor analog input
#define IN1_PIN 32      // L298N IN1
#define IN2_PIN 33      // L298N IN2
#define ENA_PIN 25      // L298N ENA (PWM motor speed)

int motorPWM = 128;  // Set initial motor PWM value (range 0-255)

float temperature;   

void setup() {
  // Start serial communication
  Serial.begin(115200);

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

  // Connect to Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, WIFI_SSID, WIFI_PASSWORD);

  // Set motor pins as OUTPUT
  pinMode(IN1_PIN, OUTPUT);
  pinMode(IN2_PIN, OUTPUT);
  pinMode(ENA_PIN, OUTPUT);

  // Set PWM for motor driver
  ledcAttachChannel(ENA_PIN, 30000, 8, 0);

  ledcWrite(ENA_PIN, motorPWM);  // Set initial motor speed (PWM value)
}

void loop() {
  // Read temperature from LM35 
  int sensorValue = analogRead(LM35_PIN);
  temperature = (sensorValue * 3.3 / 4095.0) * 100.0;  // Convert analog value to Celsius
  
  // Send temperature to Blynk app
  Blynk.virtualWrite(V1, temperature);  // Virtual Pin V1 for temperature
  
  // Send motor PWM to Blynk app
  Blynk.virtualWrite(V2, motorPWM);  // Virtual Pin V2 for motor PWM
  
  // Control motor direction (just an example)
  digitalWrite(IN1_PIN, HIGH);
  digitalWrite(IN2_PIN, LOW);

  // Run Blynk 
  Blynk.run();
}

//control motor speed from Blynk (V3)
BLYNK_WRITE(V3) {
  motorPWM = param.asInt();  // Get PWM value from Blynk
  ledcWrite(ENA_PIN, motorPWM);    // Set PWM motor speed
}