Question: Wifi RFID related API calls in ESP Open SDK

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Not sure if the readers from this forum also are members of esp8266.com forum. P erhaps my question is more relevant here, so re-posting the question (http://www.esp8266.com/viewtopic.php?f=5&t=9037) here:

There are four WiFi RFID related API calls in the 1.5.2 version of the documentation. The calls are wifi_rfid_locp_recv_open, wifi_rfid_locp_recv_close, wifi_register_rfid_locp_recv_cb, and wifi_unregister_rfid_locp_recv_cb. There seem to be very little info in the documentation about this or any other discussions.

Are these API calls to directly use the Wifi radio/antenna to work with RFID, or are these intended to be used another board? An example or more specifics will help if it is known to work.