# CircuitPython BLE Morse Code Chat

## Overview

https://www.youtube.com/watch?v=wPRhwgzYAr0

This is a modern take on tying two cups together to create a secret two-way intercom. But without the string! In this guide we'll show you how you can use two [CLUE](https://www.adafruit.com/product/4500) boards to talk to each other _wirelessly_ over Bluetooth Low Energy (BLE).

Once the boards find each other, you can send messages back and forth one letter at a time. Morse Code is used as a way to enter the letters using only the two buttons. There's even a helpful Morse Code cheat sheet on the display!

![](https://cdn-learn.adafruit.com/assets/assets/000/088/851/medium800/circuitpython_banner.jpg?1583193133)

The code is written in [CircuitPython](https://learn.adafruit.com/welcome-to-circuitpython) using newly available BLE features. It's a great way to learn or practice your Morse code, and a great way to send secrets around the classroom or camp.

**NOTE: You'll need at least two CLUE boards for this guide.**

### Adafruit CLUE - nRF52840 Express with Bluetooth® LE

[Adafruit CLUE - nRF52840 Express with Bluetooth® LE](https://www.adafruit.com/product/4500)
Do you feel like you just don't have a CLUE? Well, we can help with that - get a CLUE here at Adafruit by picking up this sensor-packed development board. We wanted to build some projects that have a small screen and a lot of sensors. To make it compatible with existing projects, we made...

Out of Stock
[Buy Now](https://www.adafruit.com/product/4500)
[Related Guides to the Product](https://learn.adafruit.com/products/4500/guides)
![Animated GIF showing CLUE board  displaying data from the many on-board sensors.](https://cdn-shop.adafruit.com/product-videos/640x480/4500-04.jpg)

- [Next Page](https://learn.adafruit.com/circuitpython-ble-wireless-morse-code-chat/circuitpython-on-clue.md)

## Featured Products

### Adafruit CLUE - nRF52840 Express with Bluetooth® LE

[Adafruit CLUE - nRF52840 Express with Bluetooth® LE](https://www.adafruit.com/product/4500)
Do you feel like you just don't have a CLUE? Well, we can help with that - get a CLUE here at Adafruit by picking up this sensor-packed development board. We wanted to build some projects that have a small screen and a lot of sensors. To make it compatible with existing projects, we made...

Out of Stock
[Buy Now](https://www.adafruit.com/product/4500)
[Related Guides to the Product](https://learn.adafruit.com/products/4500/guides)

## Related Guides

- [Introducing Adafruit CLUE](https://learn.adafruit.com/adafruit-clue.md)
- [Bluetooth CLUE Robot Car using CircuitPython](https://learn.adafruit.com/bluetooth-clue-robot-car-using-circuitpython.md)
- [CLUE Altimeter](https://learn.adafruit.com/clue-altimeter.md)
- [MIDI for Makers](https://learn.adafruit.com/midi-for-makers.md)
- [CLUE Vertical Garden Weather Visualizer](https://learn.adafruit.com/clue-vertical-garden-weather-visualizer.md)
- [Using the Bluefruit Dashboard with Web Bluetooth in Chrome](https://learn.adafruit.com/bluefruit-dashboard-web-bluetooth-chrome.md)
- [Yoga Pose Chime](https://learn.adafruit.com/yoga-pose-chime.md)
- [Metronome CLUE](https://learn.adafruit.com/metronome-clue.md)
- [CLUE Slim Case](https://learn.adafruit.com/clue-slim-case.md)
- [ulab: Crunch Numbers fast in CircuitPython](https://learn.adafruit.com/ulab-crunch-numbers-fast-with-circuitpython.md)
- [CLUE Dice Roller](https://learn.adafruit.com/clue-dice-roller.md)
- [No-Touch Hand Wash Timer for Circuit Playground Express and CLUE](https://learn.adafruit.com/no-touch-hand-wash-timer-for-cpx-and-clue.md)
- [CLUE Rock, Paper, Scissors Game using Bluetooth](https://learn.adafruit.com/rock-paper-scissors-circuitpython.md)
- [Welcome to CircuitPython!](https://learn.adafruit.com/welcome-to-circuitpython.md)
- [CLUE BLE MIDI Glove](https://learn.adafruit.com/clue-midi-glove.md)
- [CLUE Metal Detector in CircuitPython](https://learn.adafruit.com/clue-metal-detector-circuitpython.md)