ESP32 Forum

I am using an ESP32C3 processor. IDE is Visual Studio 2022 with VisualGDB. I'm making an application that has a bootloader and a webserver application - These are my partitions:

# Name, Type, SubType, Offset, Size, Flags
# Note: if you have increased the bootloader size, make sure to update the offsets to avoid overlap

nvs, data, nvs, , 0x6000,
phy_init, data, phy, , 0x1000,
factory, app, factory, , 1M,
webserver, app, ota_1, , 0x100000,

The bootloader should be in the "factory" partition and the webserver in the "webserver" ota_1 partition. How do I compile a webserver application to be downloaded and executed from the ota_1 partition. I tried various combinations, but it always downloads to the "factory" partition.

There's no difference in how the binaries for the two partitions get compiled; the toolchain simply isn't made to flash your binary to an OTA partition when a factory partition is available. You can get around it by using esptool.py to manually flash the webserver binary to the correct offset.

You can give this a try: https://github.com/boarchuz/bo_cflash
I've only used it with ESP32, in VS Code, and likely with a different IDF version to yours, so expect some obstacles.

Anyway, if it works, it allows you to select the app partition you want to flash to and optionally update ota_data at the same time to make that partition active.

Old topic, but it shows up on Google so I'll update it with an answer. Be advised that for OTA, you'll need TWO ota partitions as per the documentation: https://docs.espressif.com/projects/esp ... m/ota.html

The reason is that once you flash an OTA app to ota_0 - where will you store the next update? The ESP will automatically toggle/cycle between the two (or more) OTA partitions, so you always have a way to receive the next update