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

#define BLYNK_TEMPLATE_ID "TMPLcdT1neUP"
#define BLYNK_DEVICE_NAME "LDR"
#define BLYNK_AUTH_TOKEN "JD-aYUr5LSyqelIA1w6g3w-XfSeNZu3n"

const float GAMMA = 0.7;
const float RL10 = 50;

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

void sendSensor()
{
  int analogValue = analogRead(25);
  float voltage = analogValue * 5/4095.0;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  Serial.print("Lux: ");
  Serial.println(lux);
  Blynk.virtualWrite(V0, lux); 
}

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  timer.setInterval(1L, sendSensor);
}

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