esp_wifi_regulatory.txt and esp_wifi_regulatory.c defines wireless communication regulations for different countries and regions to ensure that the device operates in compliance with local regulations.

esp_wifi_regulatory.c is generated from esp_wifi_regulatory.txt by using the reg2fw.py script.

The num of all suppported countries in esp_wifi_regulatory.txt is WIFI_MAX_SUPPORT_COUNTRY_NUM that is defined in esp_wifi_types_generic.h

Generate esp_wifi_regulatory.c
- cd ~/esp-idf/components/esp_wifi/regulatory
- python reg2fw.py