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The tx led of arduino uno is always on and the board can't be programmed(programmer not responding) - Installation & Troubleshooting - Arduino Forum
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Amazon.com: KEYESTUDIO Mini Tank Robot V2 Smart Car Kit for Arduino, IR Infrared and App Remote Control (iOS and Android), Light and Ultrasonic Follow, 8X16 LED Panel, Ultrasonic Obstacle Avoidance : Electronics
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