ESP32 Forum

Hi!

I just ordered my first ESP32 S2 development board (ESP32-S2 Saola 1R Dev Kit featuring ESP32-S2 WROVER https://core-electronics.com.au/esp32-s ... rover.html)

However after flashing the hello_world program using the idf.py tool, I get the following error:

The tool appears to flash everything correctly, but all I get "invalid header: 0xffffff0f" spammed on my console.

Any help would be appreciated. Thanks!

How exactly are you flashing this? It feels like you only flashed the app, not the bootloader.

How about strapping pins? It looks to me like you may have some pins in wrong state. Here is normal boot:

ESP_Sprite wrote: ↑

Thu Aug 12, 2021 10:02 am

How exactly are you flashing this? It feels like you only flashed the app, not the bootloader.

I'm flashing it via usb, following the documentation here: https://docs.espressif.com/projects/esp ... ep-by-step

chegewara wrote: ↑

Thu Aug 12, 2021 4:04 pm

How about strapping pins? It looks to me like you may have some pins in wrong state.

Code: Select all

rst:0x1 (POWERON),boot:0x1f (SPI_FAST_FLASH_BOOT)

Here is normal boot:

Code: Select all

rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)

Sorry for the newb question, but how would I do that?

dininduwara wrote: ↑

Thu Aug 12, 2021 11:07 pm

I'm flashing it via usb, following the documentation here: https://docs.espressif.com/projects/esp ... ep-by-step

So just to check, you're using 'idf.py -p PORT flash', and not app_flash or some other idf.py command? Do you get any warnings while flashing?

Thank you all for the responses.
After some tinkering I randomly managed to get it to work.

First I flashed, then held down the boot btn, press reset and then disconnect power and reconnect. I had tried all these steps previously, but it only worked in this order.