Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 380 Ver. 1.00 – 10/29/2008
4.16.13. %SLEEP Select Level of Sleep Mode
(continued)
Notes If %SLEEP <mode> of 3 or 4 is selected,
and the modem has entered Deep sleep,
the UART will miss the first character that
is sent over the serial port. This first
character will wake up the UART and
subsequent characters will be accepted by
the UART. Default setting is 2