AirLink OS gives you options for managing router power usage, depending on your application and hardware configuration. For example, you can use the settings at System > MCU > Voltage Threshold and System > MCU > Power Management to configure the router to enter standby mode based on a low voltage threshold, the state of the ignition switch, or an I/O input.
Voltage Threshold
ENABLE: Enables Voltage Threshold settings, allowing you to configure custom values for:
DELAY: Set the time period (in seconds) that the voltage to the router must drop below the STANDBY VOLTAGE before the router goes into standby mode.
STANDBY VOLTAGE: If the incoming voltage to the router is below the value set in this field for the period of time set in the DELAY Period field, the router goes into standby mode.
RESUME VOLTAGE: Set the voltage at which the router exits standby mode and resumes normal operation.
The RESUME VOLTAGE must be higher than STANDBY VOLTAGE by more than 0.5 V. For example, if you set the Resume Voltage to 12 V, the highest number you can set for the Standby Voltage is 11.4 V.
Exercise caution when setting the Voltage Thresholds. Before setting the Resume Voltage, ensure that you have a power source readily available that can supply the configured voltage. The reset button is not available when the router is in standby mode, so you cannot use it to reset the router to factory default settings.
Power Management
Under Power Management, you can configure the router to enter standby mode and resume operating based on the ignition switch (for mobile installations) or an I/O connection.
VERSION: Firmware version running on the MCU microprocessor, which handles many aspects of Power Management. You may need to refer to the version for debugging purposes.
STANDBY LED: Enables (default) or disables the Standby LED. When enabled, the Power LED is solid red when the router is in standby mode. When disabled, the Power LED is off when the router is in standby mode, which reduces power draw.
POWER SOURCES: Lists the power sources (triggers) you can configure to control how the router enters standby mode. You can enable or disable each trigger from the table, or click Edit (
) to configure a power source. The sources are:
Ignition
Power Connector 4 (Primary IO)
To edit an Ignition source:
Click Edit (
) in the table on the row for Source > Ignition.
The Edit Source page appears
Set the SHUTDOWN DELAY (range is 2 to 32767 seconds; default is 3). This is the shutdown delay after ignition is off. For short stops, the delay can keep the router powered on while the vehicle is off.
Click UPDATE.
To edit an I/O source:
Click Edit (
) in the table on the row for Source > Power Connector 4 (Primary IO).
The Edit Source page appears.
Enable or disable the POWER SOURCE.
When the POWER SOURCE is enabled, select the SHUTDOWN DELAY (range is 2 to 32767 seconds; default is 30). This is the delay between the I/O state change and the router entering Standby mode.
Set which logical state of the GPIO makes the router enter or exit standby mode (Active High, Active Low). If set to Active High, the router remains on while the GPIO is high and enters standby when the GPIO is low. If set to Active Low, the router remains on while the GPIO is low and enters standby when the GPIO is high.
Enable/Disable the internal PULLUP on the Primary IO.
Please note the following:
The Primary IO and PULLUP settings can also be configured under I/O > Configuration and I/O > Digital Inputs. Enabling PULLUP on the Edit Source page shown above also enables the Pull Up setting in the I/O > Digital Inputs table.
This setting only takes effect when the router is powered on, and not in standby mode.
IMPORTANT: When PULLUP is enabled and Active Low is selected, if the I/O line is not connected to ground (floating), the router will never exit standby mode. Ensure your I/O line is grounded, or disable PULLUP for proper operation.