Hi there! :slight_smile: I have my arduino sketch working among an arduino ethernet shield. When i simply connect my arduino to my computer and upload the sketch, it works fine. However, if i only connect my arduino without uploading the sketch, it doesn't work fine at all. I have set up a led to…

Error when not uploading a sketch

OldSteve September 2, 2016, 9:16am 2

What happens if you connect without uploading, then press the Arduino's reset button?

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