For the follow-up of people and animals, the challenge for a tracker has always been the battery saving. To this end, the TMT250 offers two operating mode: the performance mode and the low power mode.
The performance mode: when it is active, GNSS module is constantly awake for a maximum track quality(excluding when Handheld device is in sleep mode).
The low power mode can be used instead of the performance mode. It can be configured in System -> Tracking Mode -> Power Save Mode -> Low Power Mode.
When low power mode is enabled, all sleep modes are desactivated and cannot be enabled.
Low power mode works like online deep sleep mode. Below, you will find some power consumption statistics when the device is not searching for coordinates and not sending any data:
When low power mode is enabled and the device is moving, the consumption is approximately 7,2 mA.
When low power mode is enabled and the device is not moving, the consumption is similar to online deep sleep consumption - approximately 4,2 mA.
Basically, it is a battery saving mode, where GNSS module is woken up only when it is time to acquire position. Min data acquisition period has to be >=60 seconds when this mode is selected.
For data sending intervals, go to Data Acquisition tab in configurator and set both On stop and Moving send periods: Example to 5 minutes (300 seconds). Min distance, angle and speed delta should be set to 0 (Recommended).
The different levels of energy consumed by the TMT250 in the different modes of use are:
GPRS: average 96 mA
Nominal: average 44.20 mA
GNSS Sleep: average 8 mA
Deep Sleep: average 3.43 mA
Online Deep Sleep: average 4 mA
Ultra Deep Sleep: average 1.50 mA
Low power mode, device moving but not looking for GPS fix: 7mA
Low power mode, device not moving: 4.2 mA
https://wiki.teltonika.lt/view/TMT250_General_description#Technical_features
To guarantee a good performance of the TMT250 use the firmware from the version 03.21.04.Rev.250.
FAQ
Q: Does the TMT250 support FOTA WEB?
A: Yes
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Q: How is it possible to switch on (and off) the TMT250?
A: You can do it with a second button. In order to turn it Off, you have to press and old this button for 5sec. To turn it On, you have to press the button for 1sec.
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Q: What are the changes between 03.21.03 to 03.21.04.rev.255?
A: The changes from 03.21.03 to 03.21.04.rev.255 are:
Reworked indication's configuration to hold LED and Vibro configuration in one byte.
Autogeofence bug fixing.
Changed GPS moving speed for TMT250 handheld to 2km/h.
Added Movement and No Movement scenario.
Added Sleep Exit Source "Alarm Button".
Other minor changes.
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Q: How to install Teltonika COMDrivers if you have problem with configurator?
A: https://wiki.teltonika.lt/view/TMT250_First_Start#How_to_install_USB_drivers_.28Windows.29
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Q: In low power mode, will modem be active to answer an SMS?
A: Yes, the device will be as responsive as in Performance mode.
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