#define BLYNK_TEMPLATE_ID "TMPL3-6ArVBop"
#define BLYNK_TEMPLATE_NAME "WATER FLOW"
#define BLYNK_AUTH_TOKEN "ZqU7wIAYsIgv5CCQTj5l1xgZbXpRPfO6"

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

// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Pump pin (simulated relay output)
#define RELAY_PIN 26

// Pump state variable
int pumpState = 0;  // 0 = OFF, 1 = ON

// Blynk timer
BlynkTimer timer;

// Send simulated data depending on pump state
void sendData() {
  float voltage, current, flow;

  // Voltage always in range (simulate mains fluctuation)
  voltage = random(220, 231); // 220–230V

  if (pumpState == 1) {
    // Pump ON
    current = random(1, 10) / 10.1; // 3.0 – 8.0 A
    flow    = random(18, 21) / 1.10; // 0.10 – 1.0 L/min
  } else {
    // Pump OFF
    current = random(1, 2) / 100.1;   // 0.1 – 0.2 A (idle)
    flow    = 0.0;                   // no water flow
  }

  // Send to Blynk
  Blynk.virtualWrite(V1, voltage);
  Blynk.virtualWrite(V2, current);
  Blynk.virtualWrite(V3, flow);
  Blynk.virtualWrite(V5, pumpState);  // Motor ON/OFF indication

  // Debug
  Serial.print("Pump: ");
  Serial.println(pumpState ? "ON" : "OFF");
  Serial.print("Voltage: "); Serial.print(voltage); Serial.println(" V");
  Serial.print("Current: "); Serial.print(current); Serial.println(" A");
  Serial.print("Flow: ");    Serial.print(flow);    Serial.println(" L/min");
  Serial.print("Pump Indicator (V5): ");
  Serial.println(pumpState);
  Serial.println("-------------------------");
}

// Receive pump control from Blynk
BLYNK_WRITE(V4) {
  pumpState = param.asInt();
  digitalWrite(RELAY_PIN, pumpState);
  Serial.print("Pump switched ");
  Serial.println(pumpState ? "ON" : "OFF");
}

void setup() {
  Serial.begin(115200);

  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  timer.setInterval(2000L, sendData); // every 2s
}

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