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Raspberry Pi 4 Model B 4 Ports USB HUB HAT for Extension Board USB to UART for Serial Debugging for Raspberry Pi 4 /3B+/Zero W - Newegg.com
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USB HUB HAT for Raspberry Pi USB to UART converter for easy serial communication can work with various versions of the Pi - AliExpress
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Amazon.com: 4-Port Raspberry Pi USB HUB HAT for Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W, 4 USB Ports Compatible with USB2.0/1.1 Onboard USB to UART Onboard Multi Indicators : Electronics
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