To anyone else with this problem, have a look at these seemingly identical issues:
https://github.com/espressif/esp-idf/issues/15866#issuecomment-2834392590

https://esp32.com/viewtopic.php?t=36723&start=10

https://github.com/espressif/esp-idf/issues/7825

The solutions seem to be:

In half ...

The attached is what points me towards using FSPI as opposed to HSPI, but then it contradicts this statement earlier on the page..

When an SPI Host is set to 80 MHz or lower frequencies, routing SPI pins via the GPIO matrix will behave the same compared to routing them via IOMUX.

Which is true?

Environment
I'm working on an ESP32-S3 project which uses FSPI and HSPI via the GPIO matrix. I'm communicating with an ADS8688 using the HSPI which operates in Mode 1 (sample on SCK falling edge) at 1MHz.

I use the esp-idf framework (4.4.7) to setup the bus, device and run half-duplex ...

Really appreciate this post and its mention of "CONFIG_BOOTLOADER_WDT_DISABLE_IN_USER_CODE".

For some reason this is enabled by default in arduinoespressif32 for ESP32S3 (via PlatformIO), I knew it would be something obvious like this but took me some time to find it!

Thanks for your reply Aditya. I've learned some more since this post, see answers below.


What is the main reason for enable Flash Encryption in development mode?

My understanding was that this is the only way to allow flashing of unlimited encrypted binaries via a known key, but maybe I ...

Query resolved - see my other related post:
viewtopic.php?f=13&t=38777&p=129402#p129402

I've resolved this after much reading of documentation and forums, so I thought I'd post my findings for anyone else in the same situation. To clarify, I'm using PlatformIO VS code extension and the esp-idf platform with Arduino as a component, so I'm unable to encrypt firmware on my HOST machine ...

Hello fellow ESP enthusiasts. I'm fairly new to this game and I'm struggling to attain some detail around encryption from the datasheets, as thorough as they are! I'm using a ESP32-WROOM-32, chip revision 1, my company is intending to start production in a few weeks, I need to use the following ...

Realised I haven't specified what I'm compiling to! It's an ESP32-WROOM-32, chip v1. Any guidance from ESP staff or otherwise would be greatly appreciated.

I have some basic questions regarding functionality of the read/write protection and eFuses which I'm unable to clarify from the documentation and existing forums.

Facts about my code
No personal data will be stored, no ota partition is available and WiFi not configured.

What I'm struggling ...