I want to update the Raspberry Pi with new codes using ArduinoOTA. Previously, I downloaded the Raspberry Pi Pico Arduino core. The Pico connects to the WiFi without any issues, but when I try to upload a new code (in this case, a simple blink code), it attempts to upload but fails. I don’t know what the problem is since the BasicOTA code also does not work over WiFi.

Output after the first upload via USB

Output after the upload over WiFi with the “blink();” function

#include <ArduinoOTA.h>
#include <LEAmDNS.h>
#include <WiFiUdp.h>
#include <WiFi.h>
#include <LittleFS.h>  
#include "secret.h"


const char* ssid = SSID;
const char* password = PW;


void setup() {
  Serial.begin(115200);

  pinMode(LED_BUILTIN, OUTPUT);

  connectToWiFi();

  if (!LittleFS.begin()) {
    Serial.println("LittleFS could not be mounted. Please check the configuration.");
  } else {
    Serial.println("LittleFS successfully initialized.");
  }

  // ArduinoOTA.setPort(2040);

  // OTA Setup
  ArduinoOTA.setHostname("xxx");  

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

    Serial.println("Starting OTA update: " + type);
  });

  ArduinoOTA.onEnd([]() {
    Serial.println("nOTA update completed");
  });

  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();
}


void loop() {
  ArduinoOTA.handle();
  delay(10);

  // blink();
}

I have enabled the TCP port 2040 (default) on my router and in my firmware and I can successfully ping the Pico’s IP address.

My goal is to wirelessly update the Pico W with new codes using Arduino. I have only come across the OTA method in Arduino