ML8011 GSM GPRS Modem User’s Manual
Page 11
Figure 5 Timing of restart system
3.5 Power saving
Upon system requirement, there are several actions to drive the module to enter low current
consumption status. For example,
“
AT+CFUN
”
can be used to set module into minimum
functionality mode and DTR hardware interface signal can be used to lead system to SLEEP
mode.
3.5.1 Minimum functionality mode
Minimum functionality mode reduces the functionality of the module to minimum level, thus
minimizes the current consumption when the slow clocking mode is activated at the same time.
This mode is set with the
“
AT+CFUN
”
command which provides the choice of the functionality
levels <fun>=0,1,4.
●
0: Minimum functionality;
●
1: Full functionality (default);
●
4: Disable both transmitting and receiving of RF part;
If the module is set to minimum functionality by
“
AT+CFUN=0
”
, the RF function and SIM card
function would be closed. In this case, the serial port is still accessible, but all AT commands
correlative with RF function or SIM card function will not be accessible.
If the module has been set by
“
AT+CFUN=4
”
, the RF function will be closed, the serial port is
still active. In this case, all AT commands correlative with RF function will not be accessible.
After the module is set by
“
AT+CFUN=0
”
or
“
AT+CFUN=4
”
, it can return to full functionality
by
“
AT+CFUN=1
”
.
For detailed information about
“
AT+CFUN
”
, please refer to AT command manual.
