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RS232 COM PDA DB9 9 Pin to USB 2.0 Cable Adapter USB to Serial Port Chip CH340 WCH Fit for Windows 7 8.1 10 11 XP Vista Mac OS - AliExpress
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Amazon.com: YACSEJAO USB to RS485 RS232 Converter USB 2.0 to RS-485 RS-232 Serial Port Adapter with CH340 Chip for Windows 11 10 8 7 XP Mac OS : Electronics
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