A simple BLE-enabled DAL programme for micro:bit V1 that scrolls error code 927 on the display, which indicates the programme is not compatible with this board.

This programme is meant to be used with the Universal Hex Creator Tool as a micro:bit V1 hex file that can be used to create a Universal Hex file together with a V2 programme that cannot be made V1 compatible, so on V1 it will scroll this error code.

Local toolchain:

• GNU Arm Embedded Toolchain
• Git
• CMake
• Python 3
• Ninja
• Yotta

Or with Docker we only need the ghcr.io/carlosperate/microbit-toolchain image.

Build with local toolchain:

yotta build

Build with docker:

docker run -v $(pwd):/home --rm ghcr.io/carlosperate/microbit-toolchain:v2.0.0 yotta build

Output file: build/bbc-microbit-classic-gcc/src/error-programme-combined.hex