Sketch uses 12648 bytes (19%) of program storage space. Maximum is 65536 bytes.
Global variables use 2456 bytes (11%) of dynamic memory, leaving 18024 bytes for local variables. Maximum is 20480 bytes.
C:\Users\janos\AppData\Local\Arduino15\packages\stm32duino\tools\stm32tools\2019.3.31/win/serial_upload.bat COM8 {upload.altID} {upload.usbID} C:\Users\janos\AppData\Local\Temp\arduino_build_881071/Blink.ino.bin
Failed to init device.
stm32flash 0.4
http://stm32flash.googlecode.com/
Using Parser : Raw BINARY
Interface serial_w32: 115200 8E1