I was able to fix this by adding the following lines after the #includes: #ifndef CHIP_FEATURE_EMB_FLASH /* Chip feature flags, used in esp_chip_info_t */ #define CHIP_FEATURE_EMB_FLASH BIT(0) //!< Chip has embedded flash memory #define CHIP_FEATURE_WIFI_BGN BIT(1) //!< Chip has 2.4GHz WiFi #define ...