June 5, 2014
about 11 months ago
The PPS output serves as debug mode selection during power on reset. If pulled-high, it’ll enter debug mode, behave as frozen. It has internal weak pull-down resistor inside. If connected to some MCU input pin with pull-high resistance, might need a lower value pull-down resistor outside to not enter debug mode.
From GPS Viewer, WAAS pull-down menu, select Configure WAAS, set Enable. They had a bad naming, configure WAAS is actually configure SBAS.
Default firmware only has GGA and RMC update rate related to reduce UART bandwidth. VTG has same info as RMC. Others messages are slow changing, has no need to be updated multiple times per second. If must need VTG at set update rate, you’ll need to ask SkyTraq for custom firmware.
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