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making "CDC" and "ACM" explicit won't hurt. +font
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edit approved Sep 26, 2016 at 15:30
PypeBros
edit approved Sep 26, 2016 at 15:30
PypeBros
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/dev/ttyACM0/dev/ttyACM0 is a USB CDC/communication device (CDC) of sub-type "abstract control model" (ACM device). That is what the Arduino is.

/dev/ttyS0/dev/ttyS0 is a hardware serial port - the (typically) 9-pin D connector on the back of your computer.

If you want to use /dev/ttyS0/dev/ttyS0 (why would you?!) you will require a special cable that converts the RS-232 voltage signals from the 9-pin D connector into the right TTL level signals for the Ardiuno and wire it in to the right pins on the board.

/dev/ttyACM0 is a USB CDC/ACM device. That is what the Arduino is.

/dev/ttyS0 is a hardware serial port - the (typically) 9-pin D connector on the back of your computer.

If you want to use /dev/ttyS0 (why would you?!) you will require a special cable that converts the RS-232 voltage signals from the 9-pin D connector into the right TTL level signals for the Ardiuno and wire it in to the right pins on the board.

/dev/ttyACM0 is a USB communication device (CDC) of sub-type "abstract control model" (ACM). That is what the Arduino is.

/dev/ttyS0 is a hardware serial port - the (typically) 9-pin D connector on the back of your computer.

If you want to use /dev/ttyS0 (why would you?!) you will require a special cable that converts the RS-232 voltage signals from the 9-pin D connector into the right TTL level signals for the Ardiuno and wire it in to the right pins on the board.

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Majenko
Majenko
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/dev/ttyACM0 is a USB CDC/ACM device. That is what the Arduino is.

/dev/ttyS0 is a hardware serial port - the (typically) 9-pin D connector on the back of your computer.

If you want to use /dev/ttyS0 (why would you?!) you will require a special cable that converts the RS-232 voltage signals from the 9-pin D connector into the right TTL level signals for the Ardiuno and wire it in to the right pins on the board.