Arduino takes picture from camera and upload it to Google Drive via Google Drive API. Login process is via OAuth 2.0.
Project tutorial by phpoc_man
A single Arduino Uno/Mega can carry up to 14 RS-232 boards. Each board is distinguished by ID, which is set via a DIP switch.
Project showcase by phpoc_man
Voltmeter can measure voltage up to 50VDC. It automatically calibrates when voltage of power supply is unstable.
Project tutorial by IoT_hobbyist
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