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1

Reading from multiple serial ports in Ubuntu

rated 0 times [ 1] [ 0] / answers: 1 / hits: 2844 / 2 Years ago, tue, september 13, 2022, 7:45:25

I´m trying to read and record data from two USBs that are connected to separate Arduinos and they are collecting different measurements.

I´m having difficulties even reading from a single serial stream in Ubuntu

I have Ubuntu installed via Oracle VM Virtualbox. I used to use Cygwin and would simply navigate to the folder I wanted to store my txt file and write:

tee </dev/ttyS1 test.txt

to monitor and record the data stream.

If I write the same command in a random folder in Ubuntu, I get Permission Denied, even if I add sudo in front.

How can I monitor and record a single serial stream.
How can I monitor and record multiple serial streams?

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ncharm

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answered 2 Years ago anatta · Accepted Answer

Check that you have the correct name for your serial USB

With the device unplugged enter

ls -la /dev/tty*

Now plug in the device and enter

ls -la /dev/tty*

There should be another device appear. If it does then that's the new device

you may see something like

crw-rw----    root dialout  166,  0 Sept 19 12:30 ttyACM0

If you do the device is recognised. Note in the example above its called ttyACM0 yours may be different.

Note the group in this case dialout If your not a member of this group add your self

sudo useradd dialout $USER

You should now be able to use the serial port using the name you found above which in my case was ttyACM0