Hello, I ran into a problem testing the library WebSerial.h;

The example sketch provided by Rui works perfectly, the problem arises if I insert a call to a function in the code. In this case the compiler gives an error. As if the function was not declared.

I wrote a very simple example with a call to an empty function and it doesn’t compile.
if anyone had any suggestions i would appreciate it very much.
Thanks

Here my code not working:

/*
Rui Santos
Complete project details at https://RandomNerdTutorials.com/esp8266-nodemcu-webserial-library/

This sketch is based on the WebSerial library example: ESP8266_Demo
https://github.com/ayushsharma82/WebSerial
*/

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <WebSerial.h>

#define LED 2

AsyncWebServer server(80);

const char* ssid = “REPLACE_WITH_YOUR_SSID”; // Your WiFi SSID
const char* password = “REPLACE_WITH_YOUR_PASSWORD”; // Your WiFi Password

void recvMsg(uint8_t *data, size_t len){
WebSerial.println(“Received Data…”);
String d = “”;
for(int i=0; i < len; i++){
d += char(data[i]);
}
WebSerial.println(d);
if (d == “ON”){
digitalWrite(LED, LOW);
}
if (d==”OFF”){
digitalWrite(LED, HIGH);
}
}

void setup() {
Serial.begin(115200);
pinMode(LED, OUTPUT);
digitalWrite(LED, HIGH);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
if (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.printf(“WiFi Failed!\n”);
return;
}
Serial.println(“IP Address: “);
Serial.println(WiFi.localIP());
// WebSerial is accessible at “<IP Address>/webserial” in browser
WebSerial.begin(&server);
WebSerial.msgCallback(recvMsg);
server.begin();
}

void loop() {
WebSerial.println(“Hello!”);
delay(2000);
TestVoidFunction();
}

void TestVoidFunction(){
// do nothing
}