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