ESP_PROG auto program doesn't work

[bonmotwang]

I am using ESP_PROG to program the ESP32 module by manually pressing RST and BOOT buttons.
It works no problem.
But the auto program feature doesn't work.
I checked with scope. the signal timing seems to be correct.
Not sure where I did wrong.
The computer is running windows 7.

[bonmotwang]

The problem seems to be the GPIO0 signal.
During the "Connecting ....._______" time, if I hold down the boot button, it will start programming.

But the target does go into the bootloader mode because my application isn't running anymore during the "connecting ....."

I really want to make the auto programming working.
Thanks
Paul

[bonmotwang]

Sometimes it will flash the module automatically without me pressing the boot button, which is what I expected.
So is there some minor timing off in idf.py program?

Is there anyone using ESP-PROG board to program their ESP32 module?

Thanks

Paul

[mikemoy]

Woks fine for me. Though you show know with many of the knock offs that are out there. This is a somewhat common issue.
I have found that adding a 0.1uf on GPIO0 line to gnd resolves this problem.