I can't program my ESP32-WROOM-32D

moataz_beheta
Posts: 2
Joined: Fri Jan 14, 2022 8:43 pm

I can't program my ESP32-WROOM-32D

Postby moataz_beheta » Fri Jan 14, 2022 8:54 pm

Hello,
I designed a circuit that contains ESP32-WROOM-32D to be programmed using CP2102N-A01-GQFN28 but it didn't work and I am not able to program it
while programming, I connect GPIO0 to "PROG" (JP1) using a pin header jumper
could someone help me to find the problem?
Attached the part of my schematic that contains the programing circuit
Attachments
esp+cp2102n.png
esp+cp2102n.png (65.93 KiB) Viewed 4582 times

ESP_Sprite
Posts: 9757
Joined: Thu Nov 26, 2015 4:08 am

Re: I can't program my ESP32-WROOM-32D

Postby ESP_Sprite » Sat Jan 15, 2022 2:13 am

What happens if you manually ground IO0? If you run a terminal program on your PC on that serial port and you reset the ESP32, do you see anything?

moataz_beheta
Posts: 2
Joined: Fri Jan 14, 2022 8:43 pm

Re: I can't program my ESP32-WROOM-32D

Postby moataz_beheta » Fri Jan 21, 2022 3:12 pm

Sorry for replying late
I didn't get anything using USB on the terminal even by connecting GPIO0 to GND directly.
I contacted the technical support of the manufacturer of CP2102 ( Siliconlabs ) and they found a mistake in the circuit of CP2102.

the circuit after being modified is attached

do you think that there is any other mistake in the circuit of ESP programing?
Attachments
cp2102n.png
cp2102n.png (76.03 KiB) Viewed 4470 times

rmetzner49
Posts: 27
Joined: Mon Mar 27, 2017 1:09 am

Re: I can't program my ESP32-WROOM-32D

Postby rmetzner49 » Sat Jan 29, 2022 3:04 pm

How are you powering the ESP32? Presumably you have a regulator somewhere? Where do you derive 3.3V ?

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