Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

Connect ESP01 to serial (hardware port: pin#0 and pin#1) of UNO and power up. Wait until LED turns on. Host a websocket client homepage (example in "accessory" directory) in the same local network.

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Arduino, the world's leading open-source hardware and software platform, today announced the launch of its next-generation UNO board, a significant re ...