I have developed a new highly cost and power efficient solution for a ChirpStack compatible Gateway. Bill of components is about 100€ (here in Finland, including VAT and customs duty). This gateway has build-in GPS module. And yes, the PPS signal is wired to SX1303 chip. Gateway is powered by using PoE.
Fine timestamping seems to work with ChirpStack OK (used by geolocation resolver).
The project is in a very early stage and this new gateway solution has been running on testbed about couple days.
There is still work to be done. Time will tell if this solution works. But as I mentioned earlier, this is a very promising solution.
I’ll share more about this project if no major issues arise during the test period.
The first diagram shows a general overview of the components used in the solution.