do you use Raspbian Stratch Lite ore the Full version with the Desktop? i always used Raspbian Stretch Lite, so i have no esperience with the Full desktop version. Lite, no desktop. and i use for time server the very first RPi 1. enabled turbo ( force_turbo=1 ), so the processor does not step up an...
I played with this a bunch the other day and I think I might have fixed it, but... do you just have tested stretch, or is it on jessie fine but stretch has issues? On jessie I was using the unstable ntp package with PPS support so I didn't have to compile it, and that was working just fine. Directly...
I'm also having issues with PPS on Stretch. My PPS source keeps getting marked as a false ticker, which just leaves the output from the GPS chip over serial and that has ~300ms swings.
Testing using `ppstest /dev/pps0` seems to work fine.
I was having problems getting this board to work with a Pi 3, and although I could never get i2c and serial to work I was able to get it working with SPI. The frequency just needs to be turned down, so my connection string looks like this: