ESP32 breakout with ESP32 WROOM 32D module creates Flashing issues..

[espbreakout]

Below is the schematics attached. Power is 3.10v on all the required pins.

Check your power supply. An AMS1117 is not supposed to output as low as 3.1V. You should see a healthy 3.3V (or very close to it) on all relevant pins.

Thanks for reply.
Power has been improved. But the condition remains same for the flash error.
Is flash corrupted or bad ?
If it is hardware issue then it should not flash anyway, but I flashed the module 2 to 3 times and then got this error. Not detecting flash or sometimes detect flash but time our error.

[ESP_Sprite]

Sounds like your hardware is still marginal somehow. How do you put the ESP32 into download mode, by the way?

[espbreakout]

Sounds like your hardware is still marginal somehow. How do you put the ESP32 into download mode, by the way?

Flash mode-
GPIO0 ---GND to keep it low
EN(BUTTON) --- ONE TIME PRESS

or sometimes keep continuing pressing the EN until IDE shows connecting... & then release it. Both works for me.

[ESP_Sprite]

Just to verify - if you connect a serial terminal program (like Putty) to the serial port and reset into download mode like that, do you see the ESP32 going into download mode properly each and every time? No corruption in the message it spits out?

[espbreakout]

Just to verify - if you connect a serial terminal program (like Putty) to the serial port and reset into download mode like that, do you see the ESP32 going into download mode properly each and every time? No corruption in the message it spits out?

Just saw it once and after that nothing.

[ESP_Sprite]

Go debug that first then. If you do not see that download message, flash isn't going to work. Simply keep a terminal open, GPIO0 connected to ground, and swap anything you think may be the issue (bad DuPont wires, bad power supply, ...) until you see that message again, and it appears consistently when you press and release reset.

[espbreakout]

Go debug that first then. If you do not see that download message, flash isn't going to work. Simply keep a terminal open, GPIO0 connected to ground, and swap anything you think may be the issue (bad DuPont wires, bad power supply, ...) until you see that message again, and it appears consistently when you press and release reset.

Thanks for that. I will troubleshoot that too.
For the testing , i assembled one new board with new PCB module and found that EN is continuousely Low & GPIO0 is also low by default when power up the Esp32 module. Nothing is connected to both pins as shown in schematics. And thoroughly chkd the short ckts. And power is 3.23 v which seems to be sufficient.
What is happening , dont know??

[ESP_Sprite]

That's impossible to say without having access to the hardware.