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Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
book

Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

by Steven Lawrence Fernandes, Tim Cox
April 2018
Beginner content levelBeginner
552 pages
13h 58m
English
Packt Publishing
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

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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Publisher Resources

ISBN: 9781788629874Supplemental Content