Adding RS-232 DTR signal output to an AVR running the avr-cdc USB library
Demonstrated in the above video is the DTR signal turning the LED on whenever a terminal window (connection) is opened.
Let’s have a nice talk about the DTR signal of RS232 connections (PIN4). Back in the days, where we all slept besides these noisy little boxes that connected us to the world wide web (BRRRRRRP DRRRRRR), the DTR signal was the most important control line of your serial connection.
Via the forum.This entry was posted in AVR, USB and tagged AVR, avr-cdc, DTR signal, USB.