I have difficult to upload sketch from Arduino IDE to HTCC-AB02 board. I am using V1.5.0 “CubeCell Development Framework” board package It compiled okay. But upload got the following error message:
Sketch uses 33044 bytes (25%) of program storage space. Maximum is 131072 bytes.
[9852] Failed to execute script CubeCellflash
Traceback (most recent call last):
File “CubeCellflash.py”, line 3, in
File “bootload.py”, line 766, in bootload.main
File “bootload.py”, line 592, in bootload.make_session
File “site-packages\serial\serialwin32.py”, line 31, in init
File “site-packages\serial\serialutil.py”, line 240, in init
File “site-packages\serial\serialwin32.py”, line 62, in open
serial.serialutil.SerialException: could not open port ‘COM4’: PermissionError(13, ‘Access is denied.’, None, 5)
Failed uploading: uploading error: exit status 0xffffffff