Globalstar ST150 User Manual page 17

9150-0125-01 R-4
Default Thresholds for Different Power States
•
Partial Suspend: 3.5V
•
Full Suspend: 3.1V
•
Full Off: 2.7V
•
HW Protection Cutoff: 2.6V
To set different thresholds via AT command details refer UAPI document Section 21.5 Voltage-Based Power
Management and Section 21.6 State of Charge Power Management.
A power state transition will trigger an event via the Event Queue UAPI so any application specific power logic
can be added. Additionally, there is a callback when preparing to ender Full Off mode for application specific
shutdown preparation.
Power Management Type
To verify the power management transitions to different states it is important to select right power
management type, either power measurement via voltage or by state of charge. By default, it's set to
POWER_MEAS_TYPE_SOC i.e., 1. For more details refer UAPI document Section 21.4 Power Management Type.
typedef enum
{
POWER_MEAS_TYPE_VOLTAGE = 0,
POWER_MEAS_TYPE_SOC
} power_meas_type_enum;
AT+PWRMEAS=< power_meas_type_enum> Queries and selects between voltage or state-of-charge-based
power management.
Manual Power States
If desired the power UAPI can be set into a manual mode allowing for power state transitions to be triggered
manually via AT command for API call. Manual power mode must be enabled before this feature will work. Once
in manual mode, all automatic state changes are disabled, and only manual state change requests will cause
state transitions.
1. To enable the manual transitions:
AT+PWRMANUAL=<manual_mode_enabled>
0 = Disable, 1 = Enable
For more details refer UAPI document section 21.3 Manual Power State Mode.
2. To make power transitions manually:
typedef enum
{
POWER_STATE_NORMAL_OPERATION = 0,
POWER_STATE_PARTIAL_SUSPEND,
POWER_STATE_FULL_SUSPENDED,
POWER_STATE_FULL_OFF,
POWER_STATE_FACTORY
} power_state;
AT+PWRSTATE=<power_state>, [<delay_minutes>]
Note: [<delay_minutes>] valid only when transitioning to Full Off Mode.
For more details refer UAPI document section 21.2 Power State API.
Power Notifications
A variety of power notifications can be enabled including low voltage, Nordic MCU Temperature, transmitter
temperature, battery pack temperature, and power state transitions. These settings and their thresholds can be
enabled through the Config UAPI. For more details refer UAPI document section 21.15 POWER EVENT NOTIFY
SETTINGS.
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