
BFree-core). Download the pre-compiled .elf
version of BFree-core, from the folder Metro M0
Express BFree Firmware at the Weather Station
repo. Then use your serial wire debugger/
programmer to flash BFree-core to the Metro M0
board, following the instructions at github.com/
TUDSSL/BFree-core/blob/main/QUICKSTART.
md. We recommend using the debugger, not the
Metro M0 bootloader, because BFree-core is still
in development, and you’ll want the debugger to
recover from a broken CircuitPython state (if it
ever happens).
3. TEST YOUR BFREE SHIELD
Attach the BFree shield on top of the Metro M0
(Figure
A
).The pins of the shield correspond
one-to-one ...