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This feature will be used to save power consumption of external battery (power supply). It let the user choose one of four power saving modes which he would prefer: '''[[{{{model|FTC921}}} Sleep modes#GPS Sleep mode|GPS Sleep]]''', '''[[{{{model|FTC921}}} Sleep modes#Deep Sleep mode|Deep Sleep]]''', '''[[{{{model|FTC921}}} Sleep modes#Online Deep Sleep mode|Online Deep Sleep]]''' and '''[[{{{model|FTC921}}} Sleep modes#Ultra Sleep|Ultra Deep Sleep]]'''. Also, after the mentioned options you can find the Timeout (min) parameter which starts counting when the device is in STOP mode. After timeout is reached and all conditions for sleep mode are met, the device goes to sleep mode. <br></br>
This feature will be used to save power consumption of external battery (power supply). It let the user choose one of four power saving modes which he would prefer: '''[[{{{model|FTC921}}} Sleep modes#GPS Sleep mode|GPS Sleep]]''', '''[[{{{model|FTC921}}} Sleep modes#Deep Sleep mode|Deep Sleep]]''', '''[[{{{model|FTC921}}} Sleep modes#Online Deep Sleep mode|Online Deep Sleep]]''' and '''[[{{{model|FTC921}}} Sleep modes#Ultra Sleep|Ultra Deep Sleep]]'''. Also, after the mentioned options you can find the Timeout (min) parameter which starts counting when the device is in STOP mode. After timeout is reached and all conditions for sleep mode are met, the device goes to sleep mode. <br></br>
'''Note:''' Detail description and conditions about every mode you can find [[{{{model|FTC921}}} Sleep modes|'''here''']].<br>
'''Note:''' Detail description and conditions about every mode you can find [[{{{model|FTC921}}} Sleep modes|'''here''']].<br>
==Time synchronization settings==
[[File:FTC921_Time_synchronization_settings.png|right|300 px]]
'''NTP Resync''' parameter determines how often a device should resynchronize its time. If the set value is not equal to zero, time resynchronization will occur periodically at time intervals to which this parameter is set.<br>
'''NTP server 1''' and '''NTP Server 2''' let the user select which NTP server (s) will be used to re-synchronize time.<br></br>
Time synchronization works by waiting a minute on startup to acquire fix and consequently synchronizes the time via GNSS. <br> This state checks the difference between RTC and GNSS times every second. If the difference of at least 3 seconds persists to be for 5 seconds, the firmware triggers a re-synchronization procedure by GNSS. <br> After that, the time difference is still calculated, but the difference is expected to persist for at least 5 minutes to trigger a GNSS time re-synchronization.<br>
In the case that there is no fix or it is lost during the syncing by GNSS state, the firmware goes to the state of syncing by NTP. Entering the state of NTP syncing, the firmware immediately attempts to synchronize the time by triggering NTP and later on, does this periodically every time the configured NTP re-synchronization time is reached (if the re-synchronization time is set to 0 – no NTP sync is performed at all). Time synchronization by NITZ can occur at any time.
[[image:Lentele.png|left|520px]]
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[[Category:FTC921 Configuration]]
[[Category:FTC921 Configuration]]
