not able to flash esp32

fcampos
Posts: 3
Joined: Fri Jan 31, 2020 3:18 pm

not able to flash esp32

Postby fcampos » Tue Sep 15, 2020 9:08 am

Hi all. I'm not an expert or something with esp32 but I've been working the past 10 months with these chips and learned something about their failures (lot of them). Right now I'm trying to flash code into my 6th esp32 and it appears the following as indicates the image attached. I'm proceding the same way as the other chips I have and only this one gives this error. As you can see in the image, it begins to compress the bytes but then stops and fails. I'm worried that the esp32 is not working anymore. If you could give me a hand I'd be appreciated.
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esp error.PNG
esp error.PNG (109.48 KiB) Viewed 111 times

ESP_Sprite
Posts: 3937
Joined: Thu Nov 26, 2015 4:08 am

Re: not able to flash esp32

Postby ESP_Sprite » Tue Sep 15, 2020 9:28 am

That smells like a failure to communicate with flash... are you sure you haven't connected anything to GPIO pins that are reserved for flash? In general, what board do you use?

fcampos
Posts: 3
Joined: Fri Jan 31, 2020 3:18 pm

Re: not able to flash esp32

Postby fcampos » Tue Sep 15, 2020 4:49 pm

Figured out. My GPIO12 was 3.26V and cannot be, because causes the flash to brownout. Everything explained here: https://github.com/espressif/esptool/wi ... other-pins

Thanks anyway!

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