How to access PPS / TIMEPULSE on GPS-RTK Dead Reckoning Pi Hat

GPS/GNSS Development Boards
1

Hello,

I just received my GPS-RTK Dead Reckoning Pi Hat (https://www.sparkfun.com/products/21305).

I’m reviewing the schematic here: https://cdn.sparkfun.com/assets/b/7/f/2 … c_v1_1.pdf

Am i reading it right, that the 1PPS signal isn’t wired up to the 40-pin Raspberry Pi header?

How can i feed this pin into the header? I’m trying to setup gpsd+chrony for GPS time sync and need a PPS signal for alignment.

Thanks,

Nick

2

Hi Nick,

Correct, the PPS signal isn’t connected directly to the 40-pin header. But it is available on the PPS breakout pad on the ‘left’ of the board. I’d recommend soldering a row of eight header pins into the breakout pads, then use a jumper wire to connect PPS to your GPIO of choice.

https://www.sparkfun.com/products/116

https://www.sparkfun.com/products/12796

I hope this helps,

Paul