bitty blue - displaying messages from micro:bit

You can send short text messages from your micro:bit to Bitty Blue and they will be displayed within the Message Display feature. The code needed for your micro:bit can be included in any MakeCode project provided you have included the Bluetooth extension.

micro:bit code - the basics

You need to include the UART Service from the Bluetooth extension and use the "Bluetooth UART write string" block to send text. That's it!