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LGT-92 LoRa GPS Tracker User Manual
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6.
FAQ
6.1
What is the lifetime for battery?
It is hard to get an exact lifetime for the battery, the actually lifetime for battery depends on the
battery type, GPS signal strength, upload periodically, use environment (indoor/outdoor). For
example, if the lgt-92 is placed in indoor environment, it will take 150 seconds to try to get GPS
fix and final it will fix fail. If the lgt-92 is placed outdoor, it will normally take less than 10 seconds
after the first fix. The power consumption and battery life are quite different.
A reference lifetime of a full charge battery on LGT-92-LI: If lgt-92 is placed outdoor, and
transmission periodically is 5 minutes. The device can last about 19 days. Please note this is an
ideal case on the GPS signal strength. Actually battery use time is affected by many factors as
mention above
6.2
Why there is 433/868/915 version?
Different country has different rules for the ISM band for using the LoRa. Although the LoRa chip
can support a wide range of Frequency, we provide different version for best tune in the LoRa
part. That is why we provide different version of LoRa.
6.3
How can I tell the firmware version on LGT92?
There are different ways to check the firmware version of LGT92
1.
Analyze the uplink payload, try to put payload decoder for v1.4 and v1.5, see which one has a
reasonable decode.
2.
Use the USB to TTL to access LGT92 and reset the device. The output info will shows the
firmware version.
