STA5-SmartLink-command-guidance.md

@@ -286,6 +286,24 @@ if (ret < 0) {
 | ---Outside of 288 bytes--- |                                          |
 | BtMacAddress[6]            | 6 bytes, the BT MAC address of MD.       |
 
+### UI Phone Link software button
+- From UI - Client
+- The Phone Link software button pressed, need to notify SmartLink.
+
+| Data member | Value                                  |
+| ----------- | -------------------------------------- |
+| version     | SML_MAJOR_VERSION                      |
+| mode        | E_DELEGATE                             |
+| AppType     | Refer to type APP_TYPE.                |
+| state       | E_STATE_OK                             |
+| AppClientID | Client ID.                             |
+| srcAppName  | Source application name in string.     |
+| dstAppName  | "SML"                                  |
+| cmd         | E_UI_PHONE_LINK_BTN                    |
+| len         | Total length of message in bytes(288). |
+
+- From SmartLink: Returned message, refer next section(Return WiFi status).
+
 ## VIP Socket
 
 ### Android Auto VIP Socket