I don't think they're properly documented as they're internal shortcuts for writing to and reading from memory that makes it clear to the reader it's a peripheral register we're accessing; there's no real functionality in them. If you're asking about the arguments (the registers and the values), you...

Good. Does removing those lines also fix your issue? If not, decoding the backtrace is your best bet: you probably want this.

You actually successfully compiled the AT firmware; it's the flashing step that fails. Are you sure your board is at COM3?

It would be nice if you put at least a little bit of effort into troubleshooting your own code instead of dumping it here and telling us to go and fix your code. What is the error message you get? Wat do you think could have caused the error message? What did you already try to solve this error? Wha...

That is not something I have heard of before, if that's any indication. Can you possibly also contact sales @ espressif.com with this? Perhaps they can help you, or do a forensic analysis on the module.

From what I can tell, that should work. Are you sure your module is a ESP32-WROOM-32U module? Asking because later WROOM modules do not have the required pins connected to the outside anymore.

I see nothing in the datasheet that prohibits this, although keep in mind that this is not a common configuration (as in: I have never seen someone else try this before) and it only gives you 5 GPIOs running at that voltage.

That is a good question. I'll ask the docs team to look into this and add it to the datasheet. If you can't wait for this, you could test this simply by taking an example program that is moderately complex (more complex than 'hello world') and adding a line that makes GPIO11 a low output at the begi...

The -Wroom modules do not have PSRAM; I imagine you may mean the ESP32-Wrover-E? If so, those modules are OK to run the PSRAM at 80MHz. (From what I recall, the PSRAM chips themselves max out at 133MHz or something, but the ESP32 does not go that high.)

I don't think there's a board called the "ESP32-Wrover-DEV", certainly not with a camera. Do you have a link to what you're using? Additionally, what SDK do you use? (Arduino, ESP-IDF, MicroPython, ...)