How to use ESP-NOW in zephyr?

[NineDayCC]

Discussed in #61055

^{Originally posted by NineDayCC August 2, 2023}
Does zephyr support ESP-NOW? I found ESP-NOW deivers in hal_espressif, but I didn't find any APIs or Kconfig options to enable ESP-NOW.
Is there any way to use ESP-NOW in zephyrOS?

[ndrs-pst]

Hi, @NineDayCC.
After reviewing the soc/xtensa/espressif_esp32/esp32/default.ld in Zephyr repository, I'm concerned that Zephyr does not yet support ESP-NOW.

This is because I couldn't find libespnow.a, which is located in the hal_espressif repository, referenced in the linker script.
This omission suggests that ESP-NOW might not be integrated into Zephyr for the ESP32 platform.

Another aspect we need to consider is whether libespnow.a is independent of the ESP-IDF platform or not.

ping @sylvioalves 👀

[rhvarrier]

@sylvioalves is there any plan to add support for esp now on zephyr?