#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID   "TMPL65FgFnLyj"
#define BLYNK_TEMPLATE_NAME "UTS WSN"
#define BLYNK_AUTH_TOKEN    "NSLTW5IYGXpdFVAkJ3-AN3HGcCo8q-jt"
#include <BlynkSimpleEsp32.h>
BlynkTimer timer;

#include <Wire.h>

#include <WiFi.h>
#include <WiFiClient.h>
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASS ""

// Pin connected to the flow sensor
const int flowSensorPin = 34;

// Variables to measure flow rate
volatile int pulseCount = 0;
double flowRate = 0.0;
unsigned long lastTime = 0;

// Interrupt service routine for counting pulses
void IRAM_ATTR pulseCounter() {
  pulseCount++;
}

void setup(void) {
  // Initialize serial communication at 115200 baud rate
  Serial.begin(115200);
  Serial.println("Program dimulai...");
  
  // Set up the flow sensor pin
  pinMode(flowSensorPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(flowSensorPin), pulseCounter, FALLING);

  // Initialize variables
  pulseCount = 0;
  flowRate = 0.0;
  lastTime = millis();

  // Connect to Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, WIFI_SSID, WIFI_PASS);
  
  // Set a timer to call the sendData function every second
  timer.setInterval(1000L, sendDataToBlynk);
}

void loop(void) {
  Blynk.run();
  timer.run();

  if (millis() - lastTime >= 1000) {
    int pinRead0 = analogRead(A0); // Read from analog pin A0 on ESP8266
    double pVolt0 = pinRead0 / 1024.0 * 3.3; // Convert the ADC value to voltage (ESP8266 uses 3.3V reference)
    double persenCahaya = (pinRead0 / 1023.0) * 100; // Convert the ADC value to a percentage

    Serial.print("Nilai ADC: ");
    Serial.print(pinRead0); // Menulis nilai ADC yang dibaca
    Serial.print(" -> Tegangan: ");
    Serial.print(pVolt0); // Menulis nilai konversi Volt melalui komunikasi serial
    Serial.print(" V -> Intensitas Cahaya: ");
    Serial.print(persenCahaya); // Menulis nilai persen intensitas cahaya
    Serial.print(" lx");
    Serial.println();

    // Calculate flow rate in liters/minute
    float pulseFrequency = pulseCount;
    flowRate = pulseFrequency / 7.5;  // YF-S201: 1 liter/min = 7.5 Hz
    pulseCount = 0;

    // Print the flow rate and total volume to the Serial Monitor
    Serial.print("Flow rate: ");
    Serial.print(flowRate);
    Serial.println();

    lastTime = millis();
  }
}

void sendDataToBlynk() {
  int pinRead0 = analogRead(A0); // Read from analog pin A0 on ESP8266
  double pVolt0 = (pinRead0 / 1024.0) * 3.3; // Convert the ADC value to voltage (ESP8266 uses 3.3V reference)
  double persenCahaya = (pinRead0 / 1023.0) * 100;

  float pulseFrequency = pulseCount;
  flowRate = pulseFrequency / 7.5;  // YF-S201: 1 liter/min = 7.5 Hz
  pulseCount = 0;

  // Send the data to Blynk virtual pins
  Blynk.virtualWrite(V0, pinRead0); // Send the ADC value to Virtual Pin V0
  Blynk.virtualWrite(V1, pVolt0);   // Send the voltage value to Virtual Pin V1
  Blynk.virtualWrite(V2, persenCahaya); // Send the light intensity percentage to Virtual Pin V2
  
  // Send flow sensor data to Blynk virtual pins
  Blynk.virtualWrite(V3, flowRate); // Send the flow rate to Virtual Pin V3
}