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By rudy
#82620 Does anyone know of a good ESP8266 NTP server that uses a GPS/RTC module as the time source?

I have a WiFi project where I want to network a lot of ESP boards. I need time but it will not have Internet access. I want to have the normal working modules to be able to do regular NTP requests and get the time. So I want to have one dedicated ESP8266 that is the NTP server for the system.

I want to use GPS but might also consider a real time clock. That's just a detail. The part that I'm not familiar with is how to implement a NTP server.