GSM/GPRS/GNSS Module Series
MC60 Series Hardware Design
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3.6.2.6. GLP Mode
GLP (GNSS low power) mode is an optimized solution for wearable fitness and tracking devices. It can
reduce power consumption by closing high accuracy positioning.
In GLP mode, the module can also provide good positioning performance in walking and running
scenarios, and supports automatic dynamic duty operation switch for balance on performance and power
consumption. It will come back to normal mode in difficult environments to keep good accuracy, thus
realizing maximum performance with the lowest power consumption.
The average current consumption in GLP mode is down to 8.9mA in static scenario, which is only 40% of
that in normal mode. It may increase a little bit in dynamic scenario. The average current consumption in
different outdoor scenarios in GLP mode and normal mode is shown in the table below.
Table 12: Average Current Consumption in GLP Mode and Normal Mode
Scenario
In GLP Mode (mA)
In Normal Mode (mA)
Static
8.9
22
Walking
11.2
22
Running
11.5
22
Driving
21.5
22
Customers can use the following commands to make the module enter into or exit from the GLP mode:
$PQGLP,W,1,1*21: The command is used to set the module into GLP mode. When
―$PQGLP,W,OK*09‖ is returned, it means the module has entered into GLP mode successfully.
$PQGLP,W,0,1*20: The command is used to make the module exit from GLP mode. When
―$PQGLP,W,OK*09‖ is returned, it means the module has exited from GLP mode successfully.
1. It is recommended to set all the necessary commands before the module enters into GLP mode. If
customers need to send commands, please exit from GLP mode first.
2. When the module enters into GLP mode, 1PPS function will be disabled.
3. When the GLP mode is enabled, the SBAS will be affected.
4. In high dynamic scenario, the module will have slightly decreased positioning accuracy in GLP mode.
5. The module supports 4800bps~115200bps baud rates and 1Hz~10Hz frequency. It is recommended
that 115200bps baud rate and 1Hz frequency are set before the module enters into GLP mode in
NOTES
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