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How to use the PPS pin?
889 0 2020-4-20
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The PPS pin on the DJI drone is used for precise timing. PPS (Pulse Per Second) is the number of pulses per second. In the GPS system, a pulse signal is generated every second and the signal is used to indicate the time of the whole second. This time is usually indicated by the rising edge of the PPS pulse. After the GPS signal outputs a UTC timestamp, the user will generate a certain delay.  In order to eliminate this delay and improve the time accuracy, the rising edge of the PPS signal is used to mark the full second of UTC to achieve synchronization below the second level timing.
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