This is a complete list of the control codes used in serial transmissions.
| ASCII Code | Control Character | Name | Meaning |
| 0 | ^@ | NULL | Null |
| 1 | ^A | SOH | Start of Header |
| 2 | ^B | STX | Start of Text |
| 3 | ^C | ETX | End of Text |
| 4 | ^D | EOT | End of Transmission |
| 5 | ^E | ENQ | Enquiry |
| 6 | ^F | ACK | Acknowledge |
| 7 | ^G | BEL | Bell |
| 8 | ^H | BS | Backspace |
| 9 | ^I | HT | Horizontal Tab |
| 10 | ^J | LF | Line Feed |
| 11 | ^K | VT | Vertical Tab |
| 12 | ^L | FF | Form Feed |
| 13 | ^M | CR | Carriage Return |
| 14 | ^N | SO | Shift Out |
| 15 | ^O | SI | Shift In |
| 16 | ^P | DLE | Data Link Escape |
| 17 | ^Q | DC1 | Device Control 1 |
| 18 | ^R | DC2 | Device Control 2 |
| 19 | ^S | DC3 | Device Control 3 |
| 20 | ^T | DC4 | Device Control 4 |
| 21 | ^U | NAK | Negative Acknowledge |
| 22 | ^V | SYN | Synchronous Idle |
| 23 | ^W | ETB | End Transmission Block |
| 24 | ^X | CAN | Cancel |
| 25 | ^Y | EM | End of Medium |
| 26 | ^Z | SUB | Substitute |
| 27 | ^[ | ESC | Escape |
| 28 | ^\ | FS | File Separator |
| 29 | ^] | GS | Group Separator |
| 30 | ^^ | RS | Record Separator |
| 31 | ^_ | US | Unit Separator |