UDP/TCP.
Default is TCP
，
if you want to change
into UDP
，
Send SMS“123456gprsmode 1”
to unit
，
if you want change back to TCP,
send SMS“123456gprsmode 0”.
Version.
Send SMS“123456version”to unit
，
it
will reply version information
Reset.
Send SMS“123456begin”to unit, it will
reply“begin ok!”, then unit will back to
default settings.
