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There are three sleep modes: GPS sleep, Deep sleep and Online sleep mode.
==GPS Sleep mode==
==GPS Sleep mode==
FMB120 is able to go to GPS sleep mode if such mode is enabled.<br/>Sleep mode timeout starts counting when device is in STOP mode. After timeout is reached and all conditions for GPS sleep mode are met, device goes to sleep mode. While in GPS sleep mode, FMB120 turns GPS module off and it is still making new periodic records. As a result power usage decreases, in turn saving vehicle battery.<br/>FMB120 can enter GPS sleep mode if ALL of these conditions are met:
* FMB120 has to be configured to work in GPS Sleep mode and sleep timeout is reached;
* Device must have time synchronized with GNSS satellites and have GPS fix;
* No movement by configured movement source or movement sensor is detected;
* Ignition (configured ignition source) is off;
* Forced wakeup is not set;
* Have no SMS to read.
FMB120 exits GPS sleep mode when ONE of following conditions is true:
* Movement by movement source or movement sensor is detected;
* Ignition (configured ignition source) is turned on.
==Deep Sleep mode==
==Deep Sleep mode==
While in deep sleep mode, FMB120 sets GNSS receiver to sleep mode and turns off GSM/GPRS module (it is not possible to wake up device via SMS). Despite records with last known coordinate being saved and sent to AVL server (GSM/GPRS module is turned on to send data and then it is turned off), power usage is decreased to save vehicle's battery. Note, that power saving depends on two configurable parameters: send period and minimum record saving period in "X on Stop Mode". When records are sent successfully in deep sleep mode, open link timeout counter will be skipped and FMB120 will enter deep sleep mode immediately.<br/>Because a lot of functions are disabled in deep sleep mode 13 I/O elements are disabled from records that are generated in this mode: GSM Signal, GNSS Status, GNSS PDOP, GNSS HDOP, Speed, GSM CellID, GSM Area Code, Fuel rate GPS, Active GSM Operator, Trip Odometer, Total Odometer, Fuel Used GPS and ICCID.
FMB120 can enter deep sleep mode if ALL of these conditions are met:
* FMB120 has to be configured in Deep Sleep Mode and Sleep Timeout is reached;
* Device must have time synchronized with GNSS satellites and have GPS fix;
* Ignition (configured ignition source) is off;
* Movement is not detected by accelerometer or configured movement source;
* ''Min. Record Saving Period'' ([[FMB120 Data acquisition settings|Data Acquisition Mode settings]]) must be larger than ''Open Link Timeout'' parameter, so that FMB120 could close GPRS link;
* The difference between ''Send Period'' ([[FMB120 Data acquisition settings|Data Acquisition Mode settings]]) and ''Open Link Timeout'' must be more than 90, so that FMB120 could close GPRS link within at least 90 seconds;
* Forced wakeup is not set;
* Have no SMS to read;
* Data socket(s) are closed;
* Data sending is not in progress;
* FOTA is not in progress.<br/>
FMB120 exits deep sleep mode when ONE of the following conditions is true:
• Movement by accelerometer or configured movement source is detected;
• Ignition (configured Ignition Source) is turned on.
==Online Deep Sleep mode==
==Online Deep Sleep mode==
==Ultra Deep Sleep mode==
==Ultra Deep Sleep mode==
