Code for ESP8266 OTA (Over The Air) Update using Arduino IDE

ESP8266_OTA__Over_The_Air__Update_using_Arduino_IDE.ino

#include <ESP8266WiFi.h>
#include <ArduinoOTA.h>

const char* ssid = "WiFi_SSID"; //Enter Wi-Fi SSID
const char* password =  "WiFi_Password"; //Enter Wi-Fi Password

void setup() {
  Serial.begin(115200); //Begin Serial at 115200 Baud
  WiFi.begin(ssid, password);  //Connect to the WiFi network
  
  while (WiFi.status() != WL_CONNECTED) {  //Wait for connection
      delay(500);
      Serial.println("Waiting to connect...");
  }

  ArduinoOTA.setHostname("myesp8266"); // Set ESP8266 Hostname (defaults to esp8266-[ChipID])
  ArduinoOTA.setPassword("admin"); // No authentication password if you remove it

  ArduinoOTA.onStart([]() {
    String type;
    if (ArduinoOTA.getCommand() == U_FLASH) {
      type = "sketch";
    } else { // U_SPIFFS
      type = "filesystem";
    }

    // NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
    Serial.println("Start updating " + type);
  });
  ArduinoOTA.onEnd([]() {
    Serial.println("\nEnd");
  });
  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
  });
  ArduinoOTA.onError([](ota_error_t error) {
    Serial.printf("Error[%u]: ", error);
    if (error == OTA_AUTH_ERROR) {
      Serial.println("Auth Failed");
    } else if (error == OTA_BEGIN_ERROR) {
      Serial.println("Begin Failed");
    } else if (error == OTA_CONNECT_ERROR) {
      Serial.println("Connect Failed");
    } else if (error == OTA_RECEIVE_ERROR) {
      Serial.println("Receive Failed");
    } else if (error == OTA_END_ERROR) {
      Serial.println("End Failed");
    }
  });
  ArduinoOTA.begin();
  Serial.println("Ready");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());  //Print the local IP
}

void loop() {
  ArduinoOTA.handle();
}