Why when connect with blynk, different value obtained from basic code

Aidid · November 19, 2022, 1:46pm

I try to do simple coding, receive data from sensor and send to blynk app. When I do without connection of blynk, the serial monitor show range of result from 500-600. As I connect with blynk, 0 value remains. Can you help why?

  #define BLYNK_TEMPLATE_ID "TMPLUbWIVa-J"
#define BLYNK_DEVICE_NAME "IoT Sound Monitoring"
#define BLYNK_AUTH_TOKEN "X1M4kjMcKWngRCBVHyaWFZecNuVt47cY"
  #include <WiFi.h>
  #include <WiFiClient.h>
  #include <BlynkSimpleEsp32.h>
  char auth[] = BLYNK_AUTH_TOKEN;
  char ssid[] = "akmalijat0_2.4GHz@unifi";
  char pass[] = "Hyperjackie12#"; 
  const byte soundpin=4;
  BlynkTimer timer;
void setup() {
  pinMode (soundpin,INPUT);
  Serial.begin (115200);
   Blynk.begin(auth, ssid, pass);
   timer.setInterval(1000L,sensorDataSend);
}

void sensorDataSend(){
  int sample= analogRead(soundpin);
  Serial.print(sample);
  Serial.print("\n");
  Blynk.virtualWrite(V0,sample);
}
void loop() {
Blynk.run();
timer.run();
}