Yes you could have a single OTA app partition and a small factory app partition with the sole purpose of updating and booting the OTA partition. Why then do we have 3 app partitions and not just let's say factory and ota_0 ? Typically, the factory app would be a fallback option, while the OTA app pa...

Because those headers have been added to the include path by the respective components, and because your component depends on those components, their headers can be included in your component like this:

1. Correct.
2. Add other components it depends on to REQUIRES: https://docs.espressif.com/projects/esp ... quirements

That's not the purpose of INCLUDE_DIRS. Have a look through some IDF components and get a feel for some typical CMakeLists.

There could be a lot of reasons for that, we don't have enough info.

Try the suggestions in this section: https://docs.espressif.com/projects/esp ... tal-builds

Look for SRC_DIRS and INCLUDE_DIRS in the linked Build System docs.

Your options are limited in AP mode. Try reducing CPU frequency or WiFi TX power (esp_wifi_set_max_tx_power).

1. Check for earlier errors in the output. The quoted error may be misleading consequence of some earlier error (eg. strtol not defined).
2. #include <stdlib.h>
3. Double check every usage of the macro, the error is likely going to be there rather than within its definition.

c_cpp_properties.json contains settings for Intellisense (auto complete, suggestions, code navigation, squiggles, etc). This doesn't alter the build system, it just makes your IDE more helpful. Assuming it's a valid IDF component, you would need to specify "/home/mzimmers/wiced/sdk/WICED-SDK-2.4.1/W...

IO20 wasn't available on earlier packages, so it was considered invalid. Support was added in IDF very recently, so you'd have to pull in/copy the latest changes to use it:
https://github.com/espressif/esp-idf/co ... 21fd142b79