[solved] BOOT Switch (Boot Mode Selection) is it needed?

kmmaran
Posts: 23
Joined: Tue Oct 23, 2018 6:20 am

[solved] BOOT Switch (Boot Mode Selection) is it needed?

Postby kmmaran » Wed Oct 02, 2019 11:32 pm

Hi Experts,

I am curious about about boot switch connected to GPIO #0 for Boot Mode Selection.
I can flash the board without press and holding the boot switch, why this switch is important and needed if I am able to flash without doing anything to GPIO #0?

Thank you.
Last edited by kmmaran on Sat Oct 05, 2019 10:29 am, edited 1 time in total.

ESP_Sprite
Posts: 4034
Joined: Thu Nov 26, 2015 4:08 am

Re: BOOT Switch (Boot Mode Selection) is it needed?

Postby ESP_Sprite » Fri Oct 04, 2019 7:57 am

Normally, the reset and GPIO0 are handled by some smart circuitry that allows your PC to reset the ESP32 and put it in download mode. This circuitry, however, doesn't work in all cases (e.g. virtual machines have issues) so the buttons are a fallback option.

kmmaran
Posts: 23
Joined: Tue Oct 23, 2018 6:20 am

[solved] Re: BOOT Switch (Boot Mode Selection) is it needed?

Postby kmmaran » Sat Oct 05, 2019 10:28 am

Thanks ESP_Sprite, good info.

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