WebSerialKEY80/examples/ESP8266_Demo/ESP8266_Demo.ino

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

AsyncWebServer server(80);

const char* ssid = ""; // Your WiFi 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.mode(WIFI_STA);
    WiFi.begin(ssid, password);
    if (WiFi.waitForConnectResult() != WL_CONNECTED) {
        Serial.printf("WiFi Failed!\n");
        return;
    }
    Serial.print("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() {

}