Any application which leverages a prefix of “hci_” is capable/meant to be used with the provided PC GUI tool for additional HCI control.
As such, it uses custom HCI protocol (WICED HCI) as per “\WICED-Studio-6.1\Doc\WICED-HCI-Control-Protocol.pdf”
In addition, these apps can be modified to act as a stand-alone embedded app by removing the WICED HCI implementation.
Also, as a point of reference, there is a stand-alone embedded applications for SPP provided as well: "WICED-Studio-6.1\20719-B1_Bluetooth\apps\snip\bt\spp"
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