April 2018
Beginner
552 pages
13h 58m
English
book
Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
by Steven Lawrence Fernandes, Tim Cox
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
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Configuring a USB-to-RS232 device for Raspberry Pi
Once you have connected the USB-to-RS232 device to Raspberry Pi, check to see whether a new serial device is listed by typing the following command:
dmesg | grep tty
The dmesg command lists events that occur on the system; using grep, we can filter any messages that mention tty, as shown in the following code:
[ 2409.195407] usb 1-1.2: pl2303 converter now attached to ttyUSB0
This shows that a PL2303-based USB-RS232 device was attached (2,409 seconds after startup) and allocated the ttyUSB0 identity. You will see that a new serial device has been added within the /dev/ directory (usually /dev/ttyUSB0 or something similar).
If the device has not been detected, you can try steps similar to ...
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