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Amazon.com: Arduino UNO R4 WiFi [ABX00087] - Renesas RA4M1 / ESP32-S3 - Wi-Fi, Bluetooth, USB-C, CAN, DAC, OP AMP, Qwiic Connector, 12x8 LED Matrix : Electronics
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Turning a LED on and off with an Arduino, Bluetooth and Android. Part III 3 LEDs and 3 Switches – Martyn Currey
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