The original CTR2 HMI has been discontinued due to part availability

Node-RED is a viable no-cost option to replace the Nextion display in CTR2. Read more here.

Learn how to use this site to quickly find the information you're looking for

Learn a little about me, what this project is, and how it came to be.

This post provides a top-down view of the CTR2 system and describes the hardware it runs on.

Learn about the features built into CTR2 here

Learn what options are currently available for CTR2

According to ARRL’s Logbook of the World, FT8 is far and above the most popular mode in ham radio today. Once you have your radio interfaced to your PC getting…

The user interface for CTR2 is structured like a web browser. The Home page appears after the startup splash screen. This page displays the basic functions of the system. From…

Every radio port and every mode (except Digital) has 10 Transmit Buffers. Learn how to manage them here!