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Amazon.com: FT232 USB UART Board (Micro) FT232R FT232RL to RS232 RS485 TTL Serial Converter USB Micro Connector Module Kit @XYGStudy : Electronics
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Amazon.com: WITMOTION USB-UART Converter 3-in-1 Multifunctional(USB to TTL/ USB to RS232/ USB to RS485) 3.3-5V Serial Adapter, with CH340 chip Compatible with Windows 7,8,Linux,Arduino for Development Projects : Electronics
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