View source for Character escape codes

{{AI}} 
Escape sequences use an escape character to change the meaning of the characters which follow it. Escape sequences can be used for two purposes:
* to use non-printable characters in [[Event_Handler#Built-In_Action_Commands|action strings]], e.g. in strings on [[EDO]] port and [[MPP]] commands
* quoting: ignore special meaning of a character in eventhandler parser.

The escape sequences are substituted when the eventhandler reads the action string. In the case of Data Protocol Commands ( @ $ ), the  escape sequences are substituted ''before'' the messages are sent to the Data Protocol Router / Handler.

In the AlphaCom the character backslash (\) is used as escape character.


Escape sequences:
{| border="1"
! style="background:#ffdead;" width="70" | Escape sequence
! style="background:#ffdead;" width="70" | Result
! style="background:#ffdead;" width="30" | Hex code
! style="background:#ffdead;" width="550" | Description
|-
| align=center|\, || align=center| , || 2C || Comma
|-
| align=center|\( || align=center| ( || 28 || Opening parenthese
|-
| align=center|\) || align=center| ) || 29 || Closing parenthese
|-
| align=center|\" || align=center| " || 22 || Double quote
|-
| align=center|\; || align=center| ; || 3B || Semicolon
|-
| align=center|\\ || align=center|\ || 5C || Backslash
|-
| align=center|\% || align=center|% || 25 || Percent
|-
| align=center|\t || align=center|TAB || 09 || ASCII TAB (Horisontal tab)
|-
| align=center|\s || align=center|SP || 20 || Space
|-
| align=center|\r || align=center|CR || 0D || Carriage return
|-
| align=center|\n || align=center|LF || 0A || Line feed
|-
| align=center|\a || align=center|BEL || 07 || Bell (Alert)
|-
| align=center|\b || align=center|BS || 08 || Backspace
|-
| align=center|\0 || align=center|NUL || 00 || ASCII NUL
|-
| align=center|\l || &nbsp; || 80 || Extended NUL ('\x80')
|-
| align=center|\! || align=center| &nbsp; || &nbsp; || Ignore rest of string
|-
| align=center|\xhh || align=center| &nbsp; || &nbsp; || 'hh' is the ASCII character code as 2 hex digits. Note that you must use 2 digits.
|-
| align=center|\#hh || align=center| &nbsp; || &nbsp; || 'hh' is the ASCII character code as 2 hex digits. Note that you must use 2 digits.
|-
|}
<br>

<br>
By using the escape sequence '\xhh' all sorts of ASCII characters can be generated.
<br><br>


[[Category:Event Handler]]