GT-1612-MTBD
GPS&Beidou Receiver Module
www.gotop-zzu.com
Page 13 of 35
Revision: V2.0.1-January 2015
Figure 7:
Seiko MS920SE Charge and Discharge Characteristics
2.4.4. Periodic Mode
Periodic mode is a power saving mode of GT-1612-MTBD that can control the full on mode and standby/backup
mode periodically to reduce power consumption. It contains periodic standby mode and periodic backup mode.
The format of the command which enables the module to enter into periodic mode is as follows:
Table 5: PMTK Command Format
Format:
$PMTK225,<Type>,<Run_time>,<Sleep_time>,<2nd_run_time>,<2nd_sleep_time>*<checksum>
< CR><LF>
Parameter
Format
Description
Type
Decimal
Type=1 for Periodic Backup Mode
Type=2 for Periodic Standby Mode
Run_time
Decimal
Full on mode period (ms)
Sleep_time
Decimal
Standby/Backup mode period (ms)
2nd_run_time
Decimal
Full on mode period (ms) for extended acquisition in case
GPS&Beidou module’s acquisition fails during the Run_time
2nd_sleep time
Decimal
Standby/Backup mode period (ms) for extended sleep in
case GPS&Beidou module’s acquisition fails during the
Run_time
Checksum
Hexadecimal
Hexadecimal checksum
