Maybe look at the following:

https://docs.espressif.com/projects/esp ... index.html

I'd suggest looking at the FAT Filesystem. Using this, you can create files that are backed by flash storage.

Think of the ESP32 as having a ROM hosted application that gets control when you boot the ESP32 in "Download" mode. This application then listens on the serial port for incoming protocol which is described in the document you found. There is a rich set of commands. However, as you realize, the appli...

For me, I would also explicitly use a mutex. The phrase "mutex" is a shortened form of "mutual exclusion" which seems to describe exactly the effect you are looking for. If task A is working on the file, task B should block until task A indicates it is no longer using the file.

Would it be possible to post the complete fragment of logic showing all the UART processing including queue creation and other parts? Maybe post that as a GIT GIST fragment or some other link?

Has anyone done a performance test of a build on Linux compared to a build on Windows 10 for the same application/project? If not, I'll be happy to run Windows 10 and Linux in two Virtual Box environments on Windows 10 with both configured to the same RAM and same processor count. Everything I have ...

What source statement is the failure occuring at? What is the error?

This is likely useful to you ...

https://github.com/espressif/esptool/wi ... l-Protocol

It shows the serial protocol that can used to drive an ESP32 to perform flash programming (amongst other things).

Please see the following:

https://github.com/espressif/arduino-es ... mponent.md

I now have a sample found here:

https://github.com/nkolban/esp32-snippe ... ud/GCP/JWT

Howdy,
Have a look at the following ... this is sample code which uses RSASSA through mbedtls to generate GCP JWT tokens.

https://github.com/nkolban/esp32-snippe ... ud/GCP/JWT