My blynk does not appear in arduino serial monitor

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    • Hardware model + communication type. For example: Arduino UNO with Ethernet Shield
    • Smartphone OS (iOS or Android) + version
    • Blynk server or local server
    • Blynk Library version
    • Add your sketch code. :point_up:Code should be formatted as example below.

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#define BLYNK_PRINT Serial
#include <ESP8266_Lib.h>
#include <BlynkSimpleShieldEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "c2af9d605fff4e96abcf5390572fb3fb";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Virus";
char pass[] = "billa3006";
#include <SoftwareSerial.h>
SoftwareSerial EspSerial(2, 3); // RX, TX

// Your ESP8266 baud rate:
#define ESP8266_BAUD 9600

ESP8266 wifi(&EspSerial);
int offset =20;// set the correction offset value
void setup()
  // Debug console
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
if (param.asInt()) {
digitalWrite(4, HIGH);
} else {
digitalWrite(4, LOW);
if (param.asInt()) {
digitalWrite(5, HIGH);
} else {
digitalWrite(5, LOW);
if (param.asInt()) {
digitalWrite(6, HIGH);
} else {
digitalWrite(6, LOW);
if (param.asInt()) {
digitalWrite(7, HIGH);
} else {
digitalWrite(7, LOW);

void loop()
 int volt = analogRead(A0);// read the input
  double voltage = map(volt,0,1023, 0, 2500) + offset;// map 0-1023 to 0-2500 and add correction offset
  voltage /=100;// divide by 100 to get the decimal values
  Serial.print("Voltage: ");
  Serial.print(voltage);//print the voltge
  Blynk.virtualWrite(V4, voltage);


Your void loop() is incorrect for Blynk use… and you should not be using delays… Use timer functions

But the big issue I see is that you haven’t even started the Blynk connection, with Blynk.begin() or Blynk.config(), in your void setup() :stuck_out_tongue_winking_eye: