M8U Ublox Working Fine on Arduino Mega but Too Slow on Arduino Due

GPS/GNSS Development Boards
1

Hi,

I recently had to switch from Arduino Mega to Due. I was using M8U Ublox module on Mega for a while without any issue using I2C. However, The same layout with Due does not work as expected. I am reading the GPS and IMU data via I2C but It is too slow. It updates every 3 seconds.

I do not have the option to go back to Mega and I have to get this module working properly with Arduino Due.

Not sure what is going on. The code and wiring is 100% identical for both boards but Due does not like it. Even though it is supposed to be the faster board than Mega.

Thanks for the help

2

Hi,

I’ve had the same issue with the Due. The u-blox modules use I2C clock stretching, and the Due does not support clock stretching. You can use Serial (UART) instead. Or SPI (by closing the SPI jumper). The SparkFun u-blox GNSS Arduino Library supports all three.

Best wishes,

Paul