feat: 添加串口连接类型参数。

connection/connection.go

@@ -36,6 +36,7 @@ type ConnType int
 const (
 	ConnTypeTCP    ConnType = iota // TCP connection
 	ConnTypeWS                     // Websocket connection
+	ConnTypeSerial                 // Websocket connection
 )
 
 type (
@@ -102,9 +103,13 @@ func NewConnection(
 		chSend:  make(chan PendingMessage, 128),
 		chWrite: make(chan []byte, 128),
 	}
-	_, ok := conn.(*WSConn)
-	if ok {
+	if _, ok := conn.(*WSConn); ok {
 		r.typ = ConnTypeWS
+		return r
+	}
+	if _, ok := conn.(*SerialConn); ok {
+		r.typ = ConnTypeSerial
+		return r
 	}
 	return r
 }