WebSerialKEY80/examples/ESP32_AP_Demo/ESP32_AP_Demo.ino

#include <Arduino.h>
#include <WiFi.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <WebSerial.h>

AsyncWebServer server(80);

const char* ssid = ""; // Your WiFi AP SSID 
const char* 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);
}

void setup() {
    Serial.begin(115200);
    WiFi.softAP(ssid, password);

    IPAddress IP = WiFi.softAPIP();
    Serial.print("AP IP address: ");
    Serial.println(IP);
    // WebSerial is accessible at "<IP Address>/webserial" in browser
    WebSerial.begin(&server);
    WebSerial.msgCallback(recvMsg);
    server.begin();
}

void loop() {

}