How to find the serial port number on Mac OS X

Question

I have just started experimenting with Serproxy and Arduino to get some serial data into Flash Builder Flex  Serproxy seems to work fine and seems to connect to whatever port is specified  However  I am not able to see or read any data from the serial port using ActionScript  This is odd  because the Arduino should be printing data on a loop   The only thing I can think of is that I am not setting the correct serial port number  I have been trying to figure out how to find out what number should be set  that is  5331  5332  5333  etc   How do I find out the port number  Is there a way to do this using Terminal on OS X maybe

User · Accepted Answer

You can find your Arduino via Terminal with

 ls /dev/tty.*

then you can read that serial port using the screen command, like this

screen /dev/tty.[yourSerialPortName] [yourBaudRate]

for example:

screen /dev/tty.usbserial-A6004byf 9600

User · Answer

I was able to screen using the device s name anyway so that wasn t the issue  I was actually just trying to find the port number  i e  5331  5332 etc  I managed to find this by a trial and error process using an app called TCP2Serial from the app store on Mac OS X  It isn t free but that s fine as long as I know it works   Worth the 99c    http   itunes apple com us app tcp2serial id506186902 mt 12

User · Answer

Try this  ioreg -p IOUSB -l -b   grep -E  quot   PortNum USB Serial Number quot

User · Answer

While entering the serial port name into the code in arduino IDE  enter the whole port address i e    dev cu usbmodem    or   dev cu UG-    where the   is the port number   And for the port number in case of mac just open terminal and type  ls  dev     and then search for the port that u have set in arduino IDE

User · Answer

mac os x don t use com numbers  you have to use something like  ser devicename    9600

User · Answer

Found the port esp32 was connected to by -  ls  dev     You would get a long list and you can find the port you need

[macos] How to find the serial port number on Mac OS X?

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