| Upload your sketch: Here comes the most important part of the whole tutorial, switch 1Sheeld to the Uploading-mode this is the switch labeled UART Switch on the board before you upload your sketch to the Arduino board to avoid serial conflicts between 1Sheeld and Arduino, then press the Upload button in the IDE | Turn on Your 1Sheeld App on your Mobile Phone |
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| - Once you have completed your upload you need to switch 1Sheeld back to the operating mode |
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