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Adafruit CP2104 Friend - USB to Serial Converter : ID 3309 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: HiLetgo 2pcs CP2104 Module USB to TTL UART 6PIN Module Serial Converter CP2104 STC PRGMR Replace CP2102 with Dupont Cables : Electronics
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Comparing the CP2102 vs. CP2104: Highly-Integrated USB-to-UART Bridge Controllers - Free Online PCB CAD Library
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Comparing the CP2102 vs. CP2104: Highly-Integrated USB-to-UART Bridge Controllers - Free Online PCB CAD Library
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ALPHA CP2104 USB To UART PCB Board Module with 2pcs16 Pin ALPHA Dedicated Extended Header Complies W/ USBXpress Driver Standard - AliExpress
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