ESP32 Forum

Posted: **Fri May 07, 2021 7:50 pm**

I have an ESP32WRROM and have connected IO2 to a button which pulls up the GPIO when you press the button.

If I hold the button and reset the esp32, I get the following error on repeat until I let go of GPIO12.

Code: Select all

rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun  8 2016 00:22:57

Any idea why?

Posted: **Fri May 07, 2021 8:19 pm**

It is a strapping pin that sets the flash voltage. Many topics about it.

Posted: **Fri May 07, 2021 8:29 pm**

Thanks! I had seen some gpio_isolate code about gpio 12 but not this.

ESP32 Forum

Pulling up IO12 prevents proper boot up

Pulling up IO12 prevents proper boot up

Re: Pulling up IO12 prevents proper boot up

Re: Pulling up IO12 prevents proper boot up