![]() ![]() ![]() 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 by Scott Fitzgerald modified by Arturo Guadalupi modified by Colby Newman This example code is in the public domain. LED_BUILTIN is set to the correct LED pin independent of which board is used. On the UNO, MEGA and ZERO it is attached to digital pin 13, on MKR1000 on pin 6. Look at any messages printed before this line, as these will likely be more informative. Most Arduinos have an on-board LED you can control. When uploading your sketch you may get: When verifying or uploading your sketch you may get: This message simply indicates that either the compilation or upload process has failed and that the process has been terminated. * Blink Turns an LED on for one second, then off for one second, repeatedly.
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