Connection problems

[M5StickFreakler]

Hi folks

I have often a connection problem to my m5stack device.
If I upload a program to the device and something goes wrong, I cannot connect to the device again.
I have to close the Windows UIFlow and start up again and load code again.
This problem occurs very often and it is very annoying.

Software:

• Firmware UIFlow-v1.4.5.1 (also with v1.4.5)
• Windows UIFlow 1.0.8.1

It seams to be a blocking of the com port by the Windows software because if I try to burn the firmware I get following message:

Command:
--chip esp32 --port COM4 --baud 921600 --before default_reset write_flash -z --flash_mode dio --flash_freq 80m --flash_size detect 0x10000 application_0x10000.bin 0x1000 bootloader_0x1000.bin 0x200000 fatfsImg_0x200000.img 0x8000 partitions_0x8000.bin 0xf000 phy_init_data_0xf000.bin 0x3ff000 wifi_0x3ff000.bin
===================================================
[3288] Failed to execute script esptool
Traceback (most recent call last):
  File "esptool.py", line 2849, in <module>
  File "esptool.py", line 2842, in _main
  File "esptool.py", line 2549, in main
  File "esptool.py", line 213, in __init__
  File "site-packages\serial\__init__.py", line 88, in serial_for_url
  File "site-packages\serial\serialwin32.py", line 62, in open
serial.serialutil.SerialException: could not open port 'COM4': PermissionError(13, 'Access denied', None, 5)
esptool.py v2.5.0

After restarting the windows UIFlow everything works fine for a while.

Does anyone have a better solution?

Best regards
Thomas

[Lewis-H]

Make Sure It's Actually Your Network Problem. ...
Power Cycle Everything and Check Other Devices. ...
Check Physical Connections. ...
Run the Windows Network Troubleshooter. ...
Check for a Valid IP Address. ...
Try a Ping and Trace Its Route. ...
Contact Your ISP. ...
Wait the Network Problems Out.