Trace: • serial_addlistener()

expr:functions:func-serial_addlistener

serial_addlistener()

Reads data from from serial port and saves it in array. Each time port sends new data, array data is refreshed and callback function is executed.

Syntax

serial_addlistner(port, callback , hnd, size);

Parameters

port	COM port name. Use string type ; e.g. “COM10”
function	Callback function name
	arg1 - port
	arg2 - array handle
	arg3 - length
hnd	Array handle
size	Number of bytes to read. Special values are:	(optional)
	0 - serial packet size.
	-1 - serial packets are read without interruption, data is read until buffer is full.
timeout	Timeout value in milliseconds. After time is elapsed, COM port will not read any incoming data.	(optional)
Return Value	Data size - integer number

Examples

hnd = array_new();
serial_addlistener("COM10", "#On_Serial_Event", hnd, 8); 
 
#On_Serial_Event
result = array_getdata(.arg2,8);

result:

See also

serial_remlistener, aray_new, array_getdata

expr/functions/func-serial_addlistener.txt · Last modified: 2023/02/15 15:06 by 127.0.0.1