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USB is Universal Serial Bus. If your question relates to a specific chip, please mention it in your question.
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USB to RS-232 to USB
Due to the long distance and noisy environment I'd like to convert the USB signal to RS-232 or 485 but my understanding is that USB to RS-232 dongles do not work on slave devices.
How do I do this? … There are USB to cat5 but I only have four conductors. …