![]() If you're using a USB-serial converter such as on a Mac, the serial port will be in the /dev directory, and the name will start with cu. Open up the Device Manager (under the System control panel) and look under Portsįor Linux, it will probably be something like /dev/ttyS0 (check your distribution docs)Īnd for a converter, /dev/ttyUSB is popular. ![]() By default almost all Windows computers have only COM1 but if you are using a USB adaptor or have a different configuration, you will have a different COM port. Now its time to figure out what COM/serial port you are using. If your computer doesn't come with a serial port (say, a Mac or some newer PCs and laptops), a USB-serial converter will work just fine ![]() Plug a serial cable from the reader to the computer's serial port
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