#define BLYNK_TEMPLATE_ID "TMPL6LgMiSOvj"
#define BLYNK_TEMPLATE_NAME "lighting cc"
#define BLYNK_AUTH_TOKEN "Nckr2VMma41casAyz5d7H53k9wVWoKB8"

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

char auth[] = BLYNK_AUTH_TOKEN ; //Auth Token
char ssid[] = "Wokwi-GUEST"; //wifi
char pass[] = ""; //password wifi

BlynkTimer timer;
#define relay 21
int SW_relay = 0;

BLYNK_WRITE(V0) {
 SW_relay = param.asInt();
 if (SW_relay == 1) {
   digitalWrite(relay, HIGH);
   Serial.println("Relay ON");
   Blynk.virtualWrite(V0, HIGH);
 }
 else {
   digitalWrite(relay, LOW);
   Serial.println("Relay OFF");
   Blynk.virtualWrite(V0, LOW);
 }
}

void setup() {
 // put your setup code here, to run once:
 Serial.begin(115200);
 pinMode(relay, OUTPUT);
 Blynk.begin(auth, ssid, pass);
}

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