An error occured while uploading the


Turns an LED on for one second, then off for one second, repeatedly.

Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
the correct LED pin independent of which board is used.
If you want to know what pin the on-board LED is connected to on your Arduino
model, check the Technical Specs of your board at:

modified 8 May 2014
by Scott Fitzgerald
modified 2 Sep 2016
by Arturo Guadalupi
modified 8 Sep 2016
by Colby Newman

This example code is in the public domain.

// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.

// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
Arduino: 1.8.15 (Windows 10), Board: "Arduino Nano, ATmega328P (Old Bootloader)"

Sketch uses 924 bytes (3%) of program storage space. Maximum is 30720 bytes.

Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.

An error occurred while uploading the sketch

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

Try the other version of Nano with the new bootloader.
Is it question BTW?

hi im gald u replied im a total beginner in these things whenever i try to upload code it shows me an error occured while uploading

pls help

Please enable verbose output during upload in file -> preferences in the IDE; do not enable verbose output during compilation.

Next upload the blink sketch; make sure nothing else is connected to the Nano. When the upload fails, click the "copy error messages" button that you see in your screenshot and paste it in a reply.

What does your operating system (which one) think of the board? Did you select the correct serial port?

@rehanjustbegan Install the core for your board (see and make you that you select the right board and port it is connected to before uploading the sketch.

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