Faq - Waveshare L76X GPS HAT User Manual

L76X GPS HAT User Manual

FAQ

1. TXD didn't flashing, data aren't printed to serial after powering on for about 1 minute. PWR
lights normally?
- Please check if STANDBY switch is turn to OFF. Press FORCE_ON button for about 1s and check
again. If there aren't data outputted still, check if you connect HAT correctly
2. Why the baud rate doesn't change after send changing command?
- Please check if the current baud rate is correct. If the satellites searched are too much, the
module cannot allows the baud rate to be smaller. In this case, you can use SET_NMEA_OUTPUT
command to reduce the output data per time and try again.
3. Why the locating is not accurate?
- The accuracy is influenced by environment. Weather reason: The humidity is every high when
raining, which weaken the intensity of the GPS signal. It often raining in summer, therefore, the
intensity of phone signals is weak. High building reason: high buildings shelter from satellite,
make GPS intensity became weak. Area problem: Suburbs have less satellite coverage, so GPS
intensity is weak in these areas. Interference problem: Sometime, signals from satellites will be
interrupted by atmosphere ionosphere, buildings, forest, water and son on.
4. Why the locating result is different with smart phone?
- L76X GPS HAT use satellite locating. Smart phone use AGPS, LBS, WIFI and Bluetooth locating as
well except satellite. Smart phone locate much faster. And the multi-satellite system used by
smart phone are different with L76X's
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