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Last Known Good is not supported in WICED which means that there is no implementation in the OTA2 source code. However, there is a placeholder for LKG code but not tested. If you check /43xxx_Wi-Fi/libraries/filesystems/ota2/wiced_ota2_image.c, they have mentioned ota_offset= OTA2_IMAGE_LAST_KNOWN_GOOD_AREA_BASE under case WICED_OTA2_IMAGE_TYPE_LAST_KNOWN_GOOD. However, this offset would need to be defined in ota2_image_defines.mk to map its memory location. We have forwarded your query to our product development team, who will evaluate your query.
Thank you for your response.
Actually I do not have to use the LKG any more now. If I need it in the future, I would like to use your reply as a reference.