| Attribute name | Attribute description |
| CommPort | Set the communication port or return the communication port number |
| Settings | Set and return the baud rate, parity bit, data bits, stop bit as a string |
| PortOpen | Set, open and close the port, or return the status information of the communication port |
| Input | Return the characters in the receive buffer and empty the receive buffer |
| Output | Write a string to the send buffer |