Command DevSerReadNChar :

Read a string of N characters from the serial line
If there are no characters to be read returns an empty string.

DevSerReadNChar Definition
Input Argument	Tango::DEV_LONG	number of the caracters to read on the serial line
Output Argument	Tango::DEV_STRING	pointer to the string read updated
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command allowed for	All states	..