TopBytes Morse Trainer - All-In-One CW Training Device (V.2)

The TopBytes Morse Trainer is a small, battery-powered CW practice unit designed to help you learn and improve both sending and receiving Morse code – anywhere, without tying up your radio. Plug in your own straight key or paddle via the 3.5 mm socket and practise real-world CW with instant visual and audio feedback.

The Morse Trainer combines a clear touchscreen interface with powerful firmware that’s updated regularly based on user feedback.

Key Features

Standalone CW trainer – no PC or radio required
Use your own key – 3.5 mm socket for straight key or twin-paddle
Built-in speaker & 3.5 mm audio out – practise quietly on headphones or with an external speaker
Adjustable speed – 5–60 WPM with Farnsworth spacing for learners
Multiple training games – Listen, Random Letter, Send Random String and more
ELIZA QSO mode – have a “live” CW QSO-style conversation with an interactive bot
Wi-Fi & web interface – configure everything from your browser
Over-the-air firmware updates – new features and improvements added regularly
Right or left-handed paddle support – switchable in software
All-day battery – internal 18650 Li-ion cell, rechargeable via USB-C

Smarter Morse Practice

The main screen shows decoded characters in a clear green window, with the raw dits and dahs underneath. You see exactly what you sent and where mistakes creep in, making it ideal for self-study and structured practice.

The built-in games include:

Listen – copy random character strings and reveal the answer to check accuracy
Random Letter – send the correct character and watch your percentage score climb
Send Random String – match a target string to progress
Send Letters – enter your own text and have the trainer play it back in Morse
ELIZA Interactive Mode – simulate a full CW QSO, exchanging name, QTH, RST, rig, antenna and WX
Flexible Hardware & Audio
3.5 mm key input – tip/ring wired for dot/dash paddle or straight key
Configurable audio – choose tone and octave, set independent volumes for internal buzzer and 3.5 mm output
Key output or audio output on rear jack – drive LEDs/keying circuits or headphones/speaker, selectable in the menu
Right/left hand paddle setting – swap sides in software with a single tap

Wi-Fi Control & Web Interface

Setup is simple. On first power-up the Morse Trainer creates its own access point so you can connect from your phone, tablet or PC and enter your home Wi-Fi details. Once on your network, just browse to morsetrainer.local (or its IP address) to access the full web interface.

From the browser you can:

Adjust WPM, Farnsworth spacing and ELIZA response delay
Change key type (paddle/straight) and paddle handedness
Configure audio output and volumes
Update firmware over the air
Reboot or factory reset if needed