I have a Core2. Mine was bricked - USB sounded when disconnecting in Windows 10. Only got it brand new yesterday and was using UIFlow, tried everything. In Arduino it could send to COM4 but then still black screen, still no reset. Then someone above said use M5Burner. Eventually reflashed the Core2FactoryTest app and wahey - green light and a beep and now everything works again. I'm adding this comment as I'm a techie for 35 years and if I run into problems like this I'm sure others will with less success.
Best posts made by ps.oz
RE: My M5 Stack Fire is Dead or Bricked somehow
RE: CoreS3 not working with UiFlow
Thanks I tried that still no success.
Every time I try download a program a Loading... popup message appears in the top right of the screen
Then a message either Execute Program Failed (from the Run button)
or Download Program Failed (from the Download button)
I can flash the demo software no problem.
I can flash the UiFlow from the burner app
and I get the uiflow menu
I cant download any uiflow program to the device.
I've tried logging out and logging back in
I'm just trying to save a simple ui with the background set to blue.
Every time I tried to download the uiflow program it gives the same timeout message.
I've tried holding the bottom button down until the green light comes on.
And saving first before sending.
I think its the fact the red button to the left of Run is never being changed from Red unless I logout then it says select device.
When I log back in and choose the device it goes to red again.
This all happened when uiflow 19 was updated.
Ive tried installing 19 again, and 20 and 21 but still not working.
Ive tried erasing the flash from uiflow and from burner.
Its really frustrating.