A simple command-line Cross-platform serial test tool, create by Joker2770< https://github.com/Joker2770/SerialPortTool >.
note: Because of hardware access problem, if you don't have a gadget with support for the serial-port interface, you should install with --devmode
$ sudo snap install --devmode serialporttool --channel=beta
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Choose your Linux distribution to get detailed installation instructions. If yours is not shown, get more details on the installing snapd documentation.
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