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I am working on a project where stm32 HID device is connected to a PC using USB cable. There is no need for unplugging on the product side, so can I replace a usb connector with JST one or directly solder it on board? Does the metal part of micro usb play a role in data transfer?

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  • \$\begingroup\$ This has been done in at least one product I'm using, with the connector available to the customer. I own a bigger version of that device and it works pretty nicely. \$\endgroup\$
    – jaskij
    Apr 13, 2021 at 10:53
  • \$\begingroup\$ The metal part connects the shield which helps with EMC but does not itself carry data. if you need the shield on your device just use another connector pin. \$\endgroup\$
    – Jasen
    Apr 15, 2021 at 20:12

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A lot of USB devices such as keyboards or mice have a captive cable which either has a custom connector is directly soldered to board.

The Micro USB connector itself plays no role in the data transfer.

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