I am using esp32 dev kit with 4Mb memory Arduino IDE
I have noticed when wifi example is running almost 50% of program space is used.
after some research, I have set memory configuration to no OTA/app code 3mb /spiff 1mb
still, I need more memory for app code
if I use a 16mb flash esp32 what is the maximum available/configurable app code space?
Your concern may be unfounded.
Yes, the stock ESP32 app is about 0.5 megabytes, which is 50% of the default 1MB app partition. However, any code you write, or any libraries you add to it are not going to consume the other 50% that quickly.
In my experience the code you add will barely register at all. When I started a project some time ago - that was my first impression, too ("whoa, the `hello world' stuff takes 500kB, wtf?"). But after two years and many, many thousands of lines of code, it has grown to only 73% of the allowable space, and the project is finished. What I mean is that you should worry about partitioning and insufficient space only after you actually exhaust it. I'd suggest keeping the default partitioning, especially if you're considering using the OTA update functionality - it is a very useful thing if you can use it in your specific case.
