Hello,
I recently designed a new Board and due reasons of availability I had to choose the ESP32-S2-Mini-1. My Application is using almost all GPIO pins. Only GPIO 18,26,45 and 46 are unused and floating.
As discribed in the Subject, I found something odd, the ESP won't exit Download mode as long GPIO 2 is pulled to GND. In my Application the GPIO is connected to a switch, as soon I set the switch to the other Position to let GPIO2 floating the ESP boots from SPI-flash as expected.
Is this a bug or to be expected? I didn't find any Information that GPIO2 is one of the strapping Pins for ESP32-S2...
Do you have any idea to solve this issue, I want the ESP to boot on reset or power on regardless of the state of GPIO 2.
Thank you
ESP32-S2-Mini-1 no SPI-Boot when GPIO 2 is pulled low
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Re: ESP32-S2-Mini-1 no SPI-Boot when GPIO 2 is pulled low
GPIO2 is not a bootstrap pin. Are you sure your hardware isn't somehow pulling down GPIO0 when you pull GPIO2 low? Pulling GPIO0 low *would* result in re-entering download mode.
Re: ESP32-S2-Mini-1 no SPI-Boot when GPIO 2 is pulled low
The issue was me...
I just found out I mixed up the silkscreen labeling on my board, so the switch I assumed to be GPIO 2 was infact GPIO 0.
To conclude the ESP32-S2 is working as to expect, the problem was a bad silkscreen labeling on my board. Thank you for your help and for making me check my design files again, I didnt notice this mistake before.
This topic can get closed now.
I just found out I mixed up the silkscreen labeling on my board, so the switch I assumed to be GPIO 2 was infact GPIO 0.
To conclude the ESP32-S2 is working as to expect, the problem was a bad silkscreen labeling on my board. Thank you for your help and for making me check my design files again, I didnt notice this mistake before.
This topic can get closed now.
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- Posts: 9713
- Joined: Thu Nov 26, 2015 4:08 am
Re: ESP32-S2-Mini-1 no SPI-Boot when GPIO 2 is pulled low
No problem, glad you found the issue!
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