Maker Electronics

Arduino troubleshooting

Arduino boards, USB upload, sketches and serial communication.

Published resources

Known symptoms and fixes

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Fix upload failures by checking the cable, port, board target, bootloader timing and serial conflicts.

Beginner15-40 minutes

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Find cable, USB driver, bootloader and board hardware causes when no Arduino port appears.

Beginner20-45 minutes

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Reduce unstable analog readings by checking reference, grounding, wiring, source impedance and sampling.

Intermediate30-60 minutes

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Recover a missing I2C sensor by checking voltage, address, pull-ups and bus wiring.

Intermediate25-55 minutes

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Prevent relay switching from browning out or disturbing a microcontroller.

Advanced40-90 minutes

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Stabilize a servo by fixing power, ground, signal timing and mechanical load.

Intermediate25-60 minutes