BlynkWidgetWrite declared void in Arduino IDE 2.3.2

Solved
1

This is the code that i tried to compile:

#define BLYNK_TEMPLATE_ID "TMPL6OqZQZLmb"
#define BLYNK_TEMPLATE_NAME "arkoose"
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

#define ENA 16  // Enable/speed motors Right  GPIO16(D0)
#define ENB 5   // Enable/speed motors Left   GPIO5(D1)
#define IN_1 4  // L298N in1 motors Right     GPIO4(D2)
#define IN_2 0  // L298N in2 motors Right     GPIO13(D3)
#define IN_3 2  // L298N in3 motors Left      GPIO2(D4)
#define IN_4 14 // L298N in4 motors Left      GPIO0(D5)

const int MAX_SPEED = 255;  // Maximum speed value (0-255)
int Speed;

char auth[] = "BLABLABLBLA"; // Blynk auth token
char ssid[] = "dlinkl_31f3"; 
char pass[] = "953a9a"; 

int command = 0; // Variable to store command received from Python

void setup() {
  Serial.begin(9600);
  pinMode(ENA, OUTPUT);
  pinMode(IN_1, OUTPUT);
  pinMode(IN_2, OUTPUT);
  pinMode(IN_3, OUTPUT);
  pinMode(IN_4, OUTPUT);
  pinMode(ENB, OUTPUT);

  Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);  
}

====================
BLYNK_WRITE(V0) { 
  int command = param.asInt(); 
  }
=======================
void loop() {
  Blynk.run(); 
  executeCommand();
}

void executeCommand() {
  switch (command) {
    case 1: 
      carForward(); // Full speed forward
      break;
    case 2: 
      carBackward(); 
      break;
    case 3:
      carLeft();
      break;
    case 4:
      carRight();
      break;
    default:
      carStop(); // Stop if an invalid command is received
  }
}

// ... Your motor movement functions remain the same ... 
void carForward() {
  analogWrite(ENA, Speed);
  analogWrite(ENB, Speed);
  digitalWrite(IN_1, LOW);
  digitalWrite(IN_2, HIGH);
  digitalWrite(IN_3, HIGH);
  digitalWrite(IN_4, LOW);
}

void carBackward() {
  analogWrite(ENA, Speed);
  analogWrite(ENB, Speed);
  digitalWrite(IN_1, HIGH);
  digitalWrite(IN_2, LOW);
  digitalWrite(IN_3, LOW);
  digitalWrite(IN_4, HIGH);
}

void carLeft() {
  analogWrite(ENA, Speed);
  analogWrite(ENB, Speed);
  digitalWrite(IN_1, HIGH);
  digitalWrite(IN_2, LOW);
  digitalWrite(IN_3, HIGH);
  digitalWrite(IN_4, LOW);
}

void carRight() {
  analogWrite(ENA, Speed);
  analogWrite(ENB, Speed);
  digitalWrite(IN_1, LOW);
  digitalWrite(IN_2, HIGH);
  digitalWrite(IN_3, LOW);
  digitalWrite(IN_4, HIGH);
}

void carStop() {
  digitalWrite(IN_1, LOW);
  digitalWrite(IN_2, LOW);
  digitalWrite(IN_3, LOW);
  digitalWrite(IN_4, LOW);
}

Error are in here:
BLYNK_WRITE(V0) {
int command = param.asInt();
}

It says
C:\Users\nabil\OneDrive\Documents\Arduino\pingback\mobil.ino:42:6: error: variable or field ‘BlynkWidgetWrite’ declared void
42 | BLYNK_WRITE()
| ^~~~~~~~
C:\Users\nabil\OneDrive\Documents\Arduino\pingback\mobil.ino:42:23: error: ‘BlynkReq’ was not declared in this scope
42 | BLYNK_WRITE()
| ^
C:\Users\nabil\OneDrive\Documents\Arduino\pingback\mobil.ino:42:71: error: expected primary-expression before ‘const’
42 | BLYNK_WRITE()
| ^

exit status 1

Compilation error: variable or field ‘BlynkWidgetWrite’ declared void

What should i do at this point? because i saw previous post and it has simmilar issue but its on older version of arduino ide.

my project setup are:
ESP8266 WIFI
ARDUINO IDE 2.3.2
BLYNK 1.3.2 SG SERVER

2

Your code compiles fine for me (once the two “====================” lines are removed).

What board type are you choosing in the IDE?
What ESP8266 core version do you have installed in the IDE?

Pete.

1 Like
3

Hey there pete thanks for the reply. Im using esp8266 by community version 3.1.2 the board are 12e module

4

Me too.

“12e module” isn’t an available board type in the IDE.

Pete.

5

Its nodemcu 1.0 (ESP-12E MODULE)

6

It compiles fine for me with that board type.

Pete.

7

Hey Pete, the issue is resolved. I uninstalled and reinstalled the arduino ide(2.3.2 same version). It works and resolved. Thank you for the help Pete

1 Like