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Showing content from https://github.com/sparkfun/SparkFun_Ublox_Arduino_Library/issues/38 below:

Module not having bytes available · Issue #38 · sparkfun/SparkFun_Ublox_Arduino_Library · GitHub

Platform: Artemis

Measurement period is extreme: 10Hz with nav rate of 5Hz (update rate of 2Hz). Problem also shows itself with Example6_OutputRate (nav freq set to 10Hz).

Module will say bytes are available but will present 0xFFs towards the end of the frame.

In this example, 0x64 bytes are 'available':

But part of the way through the byte harvesting, we start getting 0xFFs:

And then our CRC is corrupt. This error occurs ~3 times per 10 seconds.

Often the frame will include 0xFFs in between what looks to be valid data:

It seems as though the module is busy updating other ports (serial, SPI, etc) and is not serving up bytes to I2C buffer.


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