How to tell which serial port is working in Ubuntu
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Use command line tools: You can use the command
ls /devto list all serial devices in the system. Usually the names of serial devices start withttySorttyUSBbeginning. You can use thedmesg | grep ttycommand to view the serial port device information when the system starts. -
You can use serial port monitoring tools such as minicom, PuTTY, etc. to open the serial port device for data testing. By successfully sending and receiving data, you can verify the normal working status of the serial port.
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You can use specialized serial port detection tools (such as Serial Port Monitor, RealTerm, etc.) to scan the serial port devices in the system for testing and debugging.
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