Thank for the suggestion, but for sure I won't update the SDK :) We spend too much time fixing, debugging, and above all understanding the use and black magic of the current SDK we use. Since it has been developped by Espressif I don't trust it at all. It's worthless to invest time in it, it's not e...

Okay, I reworked my test and could narrow the situation a little more. The simple code below runs as expected when compiled for non-FOTA. But when compiled for FOTA: - If linked with gc-section option, works only if pwm_start() is commented out. - If linked without gc-section option, works only if p...

Hi all, I've got an OTA program that use and link against these libs (among others): libssl, libpwm and libdriver. But depending on if I link with the option gc-section (to remove unused code), or depending on the libraries I link against, my program crashes to Fatal Exception (0) right after boot, ...

Hi all, I have a NON-FOTA code that compiles and works perfectly fine on the ESP8266. However if I compile the exact same code for OTA build, with the same compiler and linker options and linking the same libraries, the bootloader jumps @01000 to run user1, but immediatly after throws a fatal except...

Hey all, I build my two applications for OTA upgrade user1.bin and user2.bin, one for each flash slot (for addresses 0x01000 and 0x81000 respectively). The documentation says that the first byte of an application built for the ESP8266 is always 0xE9. This is the "magic byte" (https://www.e...

Hey ! Yes you can, this is the "OTA" feature of the Esp. In the SDK you have different bootloaders available. The bootloaders for OTA basivally consider the flash is split in two slots (called user1 and user2 by Espressif), and they will run one of the two applications according to a flag ...

Yep, and here is their ASM solution
https://github.com/esp8266/Arduino/blob ... 266/cont.S

Hey, I am also studying a way to do a kind of wait() or delay() that would block the execution of my function while letting the SDK do its background tasks like Wifi and TCP processing. I've found very intersesting things in the ESP support for Arduino IDE: their great guys have built this exact sam...

Okay, my mistake. It was because I did not understand that the code in uart.c was actually already doing some custom processing of the data that arrived on the UART, like reprinting it and clearing the buffer, especially on the UART_RXFIFO_TOUT_INT interrupt event. It was not a basic UART driver to ...

Hi, Here is my basic understanding so far, certainly not accurate, but maybe it can give you some hints :) I will assume you are talking about bare C software programming (the one I play with): 1) The ESP being basically a microcontroller, you decide the sofware architecture... However, Espressif pr...