#define BLYNK_TEMPLATE_ID "TMPL6Je2d29Vt"
#define BLYNK_TEMPLATE_NAME "sistem pemantauan kualitas air kolam renang"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <Wire.h> // For I2C communication

// Blynk Auth Token
char auth[] = "YOUR_BLYNK_AUTH_TOKEN";

// WiFi Credentials
const char* ssid = "YOUR_WIFI_SSID";
const char* password = "YOUR_WIFI_PASSWORD";

// Sensor Pins
const int pH_Pin = A0;
const int Chlorine_Pin = A1;
const int WaterLevel_Pin = A2; // Optional

// Relay Pin
const int Pump_Relay = 13;

// Blynk Virtual Pins
const int pH_Value_Widget = V1;
const int WaterLevel_Widget = V2; // Optional
const int Pump_Control_Widget = V3;

// Calibration Values (Adjust based on your sensors)
const float pH_Offset = 0.0; // Add or subtract to calibrate pH reading
const float Chlorine_Offset = 0.0; // Add or subtract to calibrate chlorine reading

void setup() {
  Serial.begin(115200);
  // Initialize WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi connected");
  Serial.println(WiFi.localIP());

  // Initialize Blynk
  Blynk.begin(auth, ssid, password);

  // Initialize Relay
  pinMode(Pump_Relay, OUTPUT);
  digitalWrite(Pump_Relay, LOW); // Relay off by default

  // Initialize Sensors (Adjust based on your sensor types)
  // ...
}

void loop() {
  Blynk.run();

  // Read Sensor Values
  float pH_Reading = analogRead(pH_Pin);
  float Chlorine_Reading = analogRead(Chlorine_Pin);
  // ... (Read water level if using)

  // Apply Calibration
  pH_Reading += pH_Offset;
  Chlorine_Reading += Chlorine_Offset;

  // Send Data to Blynk
  Blynk.virtualWrite(pH_Value_Widget, pH_Reading);
  Blynk.virtualWrite(Chlorine_Value_Widget, Chlorine_Reading);
  // ... (Send water level if using)

  // Pump Control (Based on Blynk Widget Input)
  if (Blynk.virtualRead(Pump_Control_Widget)) {
    digitalWrite(Pump_Relay, HIGH); // Turn pump on
  } else {
    digitalWrite(Pump_Relay, LOW); // Turn pump off
  }

  delay(1000); // Update readings every second
}