#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";  // Wokwi default WiFi
char pass[] = "";

// Pins
#define RELAY_PIN 26   // Simulated pump control pin

// Blynk timer
BlynkTimer timer;

// Function to send random sensor values
void sendRandomData() {
  // Generate random test values
  float voltage = random(200, 240);      // 200–240V
  float current = random(0, 100) / 10.0; // 0.0–10.0A
  float flow    = random(0, 50) / 10.0;  // 0.0–5.0 L/min

  // Send to Blynk Virtual Pins
  Blynk.virtualWrite(V1, voltage);
  Blynk.virtualWrite(V2, current);
  Blynk.virtualWrite(V3, flow);

  // Debug prints
  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");
}

// Receive pump control command from Blynk (V4)
BLYNK_WRITE(V4) {
  int state = param.asInt();   // 1 = ON, 0 = OFF
  digitalWrite(RELAY_PIN, state);

  Serial.print("Pump: ");
  Serial.println(state ? "ON" : "OFF");
}

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

  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW); // Pump OFF initially

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  // Send random data every 2 seconds
  timer.setInterval(2000L, sendRandomData);
}

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