A clock, using a matrix led shield on a ESP8266 D1 mini.
On first boot, you must connect to the 'd1mini-clock' captive network and set your local wifi credentials.
- gets internet time from NTP (NTPClient)
- apply summer time offset (Timezone)
- spawn a hotspot to get wifi connectivity (WiFiManager)
- over the air update (ArduinoOTA)
- remote telnet debug (RemoteDebug)