With my obsession of clocks, I had naturally decided to build a stratum ‘x’ NTP server using a GPS enabled ESP32.
GPS Stratum Explained
NTP protocol
Build Process
Resources
Fortunately, this is not really a new concept, so there were a plethora of resources out there.
https://iotdesignpro.com/projects/nodemcu-esp8266-gps-module-interfacing-to-display-latitude-and-longitude. <_ This works well
Portable GPS Time Server Powered by the ESP8266
https://www.instructables.com/ESP8266-Wireless-NTP-Stratum1-Server/
https://www.lloydm.net/Demos/GPS-NTP.html