I call this project a 'modem,' but it can be used with a simple terminal Through its A/D converter, and then do some basic DSP detection and filtering ofĪnalog CW signals, without the need for an external tone detector. Microcontroller also has enough computing power to read audio data directly I was surprised to learn that the little AVR

Perform the morse code decoding operations, while offloading the tone detection

My original goal was just to get the Arduino to This project has gone through several revisions, and now supports This article describes hardware and firmware forĮncoding and decoding of on-air CW using an modem based on these controllerīoards. I recently started playing withĪruduino boards for various ham applications, and thought a CW program for theĪrduino might be fun. Version 2.0 modem, based on the Teensy, see the Version 2.0Ĭode) is one of my favorite activities. the software tracks the speed of the sender's dahs to make its adjustments.CW Modem Matt Roberts - matt-at-kk5jy-dot-net Published: Updated: This article is for the original version, based on the Arduino Uno. if the tone decoder is not centered on the frequency of the incomming signal, you may have to fine tune the module as you lower the volume. lowering the volume of the incoming cw can also help. if you are not seeing solid copy, press the restart button on your arduino. the first few characters may come out wrong while it homes in on the speed. the program will automatically adjust to the speed of code that is being sent.

this module allows you to tune to the frequency of a specific tone while ignoring noice and other tones of different frequencies. details of this module will eventually be posted on line. this project makes use a custom built tone decoder module using the lm567c microchip. mit license, all text above must be included in any redistribution. 1.1 (c) 2014, budd churchward - wb7fhc this is an open source project search youtube for 'wb7fhc' to see several videos of this project as it was developed. wb7fhc-cw-decoder-arduino has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. Wb7fhc-cw-decoder-arduino is a C++ library typically used in Internet of Things (IoT) applications.

Cw decoder arduino