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GPS stands for Global Positioning System. For 3D fix, we need at least four satellites.
Normally the accuracy of GPS under open sky which means no tall building and clear sky is
within 10 meters per second. Therefore, if the device shift 10 meter at that second, the device
may shows 36 kilometer per hour instant speed. Nowadays, the GPS consumer product has
built in adjust algorithm and assisted method to extend capability of GPS.
What is Water Resistant IPX7?
Protected against the effects of temporary immersion in water. Under specific conditions of
pressure and duration, water must not enter a temporarily submerged headlamp in quantities
that would cause adverse operational effects.
The IPX7 waterproof standard is for device one meter under water within 30 minutes
protection. Waterproof standards usually measure by the pressure of water. IPX7 standard
provides device protection to be exposed the rain and sprayed over water. However, the
pressure of swimming or diving should exceed IPX7 standard.
Do not interrupt during upgrading the firmware
Choose the right firmware file carefully
Press UP+PG+PW to enter Boot Loader mode if device dead from fail of firmware
update and then process updating process again to recover device.
What is GPS?
Note for Upgrading Firmware
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