Using USBSerial on BLACKPILL board.

For more details click on the link below:

Import programBlackpill_Hello

Using low cost Blackpill (STM32F411CEU6) boards with mbed.

Revision:
0:2912fe6f7530
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.gitignore	Sat Jan 30 11:18:14 2021 +0000
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+.build
+.mbed
+projectfiles
+*.py*