Add plus_pair_request function

Author: bouwew

plugwise_usb/__init__.py

@@ -176,6 +176,14 @@ def port(self, port: str) -> None:
 
         self._port = port
 
+    async def plus_pair_request(self, mac: str) -> bool:
+        """Send a pair request to a Plus device."""
+        try:
+            await self._network.pair_plus_device(mac)
+        except NodeError as exc:
+            raise NodeError(f"{exc}") from exc
+        return True
+
     async def set_energy_intervals(
         self, mac: str, cons_interval: int, prod_interval: int
     ) -> bool:

plugwise_usb/network/__init__.py

@@ -152,6 +152,21 @@ def registry(self) -> list[str]:
 
     # endregion
 
+    aync def pair_plus_device(self, mac: str) -> bool:
+        """Register node to Plugwise network."""
+        _LOGGER.debug("Pair Plus-device with mac: %s", mac)
+        if not validate_mac(mac):
+            raise NodeError(f"MAC {mac} invalid")
+
+        request = CirclePlusConnectRequest(self._controller.send, bytes(mac, UTF8))
+        if (response := await request.send()) is None:
+            raise NodeError("No response for CirclePlusConnectRequest.")
+
+        # how do we check for a succesfull pairing?
+        # there should be a 0005 wxyz 0001 response
+        # followed by a StickInitResponse (0011)?
+        
+
     async def register_node(self, mac: str) -> bool:
         """Register node to Plugwise network."""
         try: