ardxx1:
Upload gives 'No device found on COM4, an error occurred while uploading the sketch.
Please do this:
- File > Preferences
- Uncheck the checkbox next to "Show verbose output during: compilation"
- Check the checkbox next to "Show verbose output during: upload
- Click "OK"
- Sketch > Upload
- After the upload fails you'll see a button on the right side of the orange bar "Copy error messages" (or the icon that looks like two pieces of paper at the top right corner of the black console window in the Arduino Web Editor). Click that button.
- Paste the error messages in a reply here USING CODE TAGS (</> button on the forum toolbar).