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uphp:functions:register_callback
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register_callback
WM-MEGA, WM-M2, WM-MINI2 >= 2.1000
Register a call back to a system event
Description
int
register_callback (
string
$callback_type
[,
int
$script_name
]
[,
string
$function_name
] )
This function will register a callback which will be called when a system event occurs.</html>
Parameters
$callback_type:
| Name | Description |
|---|---|
| DATA_RX | Data is received |
| DATA_TX | Data is sent |
| RS232_RX | Data is received on RS-232 |
| RS232_TX | Data is sent on RS-232 |
| CONNECTED | Internet is connected via dongle |
| DISCONNECTED | Internet is disconnected |
| MQTT_CONNECTED | MQTT connection is established |
| MQTT_DISCONNECTED | MQTT connection is lost |
| MQTT_ERROR | MQTT has an error connecting |
$script_name: Optional name of script to execute, or leave blank ('') in order to specify a function name in the currently executing script.
$function_name: Optional name of function to execute, leave blank if executing a script. This only works if the event occurs while the current script is still running and the hook will be automatically removed once the script terminates.
Return Values
Integer: 1 on success or 0 on failure
Example
<? register_callback("CONNECTED","/scripts/internet_connected.cgi",""); ?>
See Also
unregister_callback() - Remove a callback
uphp/functions/register_callback.txt · Last modified: 2021/09/13 05:57 (external edit)
