Usage:
1. Downloaded IDE
Download address: http://arduino.cc/en/Main/Software (Copy Open)
2. Download USB chip driver
Download address: http://wch.cn/downloads.php?name=pro&proid=65
3. Plug in the NANO development board and the driver will be automatically installed
4. Select the board NANO in the die
5. Select the COM port, which can be queried on my computer. Just now, the port in your Uno development board
6. It's best to first choose the built-in routine program and burn it in
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