Ethernet restart about esp32-evb

[DanKoloff]

"short circuit 3.3V with GND" is not good idea... better remove the 3.3V instead of short-circuiting the board...

The reset signal that is connected to the reset button is ESP_EN, it can be found on pin #33 of the EXT1 header. To reset the board you need to keep ESP_EN in low position and then release it back up. It is risky to connect it to ESP32's GPIO tho, you might shoot yourself in the foot.

[iBobik]

Thank you for reply. Will be safe to ground ESP_EN by a transistor controlled by some GPIO? Which transistor shoudl work? Honza Pobořil

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On 16. 3. 2021 10:13:40, DanKoloff ***@***.***> wrote: "short circuit 3.3V with GND" is not good idea... better remove the 3.3V instead of short-circuiting the board... The reset signal that is connected to the reset button is ESP_EN, it can be found on pin #33 of the EXT1 header. To reset the board you need to keep ESP_EN in low position and then release it back up. It is risky to connect it to ESP32's GPIO tho, you might shoot yourself in the foot. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#30 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAEV6WBJ5I3SGFQPRKKMB4DTD4OMJANCNFSM4ZGSS64A> .

[DanKoloff]

First test directly with a free GPIO, place 1uF capacitor on the wire. It is worth testing the simple setup first.

[iBobik]

Hello,
I've tried to ground ESP_EN by 1-4 0,95uF capacitors, but restart not happened.

[iBobik]

Here someone recommended to just wire GPIO and RST:
https://www.researchgate.net/post/How-to-reboot-reset-ESP32-without-pressing-the-reboot-button-on-the-board

What could happen?

[DanKoloff]

Well I wrote the same: "First test directly with a free GPIO, place 1uF capacitor on the wire. It is worth testing the simple setup first."

[iBobik]

Sorry, I am not sure I understand you, so I draw it :-)

Here is what I tried:

[iBobik]

Also tried this:

[DanKoloff]

Why GPIO5 exactly? Did you toggle GPIO5 in those tests by software means?

Try with one of the GPIOs that are available at the UEXT connector - for example GPIO16 or GPIO13.

[iBobik]

U use GPIO5 because it is not used anywhere else. Yes, I toggled it by SW. Is there something wrong with this? I have not used UEXT pins because I use this connector for something else (only GPIO 13, 14 and 15). Honza Pobořil

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On 4. 5. 2021 8:57:24, DanKoloff ***@***.***> wrote: Why GPIO5 exactly? Did you toggle GPIO5 in those tests by software means? Try with one of the GPIOs that are available at the UEXT connector - for example GPIO16 or GPIO13. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#30 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAEV6WG3LYEQOEH5LDT26Y3TL6LFJANCNFSM4ZGSS64A> .

[DanKoloff]

Just as a test try with one of the pins from the UEXT instead of GPIO5, for example GPIO16 which seems that you don't use for the other connection.