Utilising the snappily titled Sunton ESP32-2432S028 EVB ... this is to sync the RTC (the local measure of ‘time’ for that TOTP) with a downstream NTP server. If you don’t do this, you ...

We usually require more pins, but if medium-sized ESP32-C3 modules are priced near the ESP8266-12-style modules, we can’t see any reason to buy the latter; for us it will literally be an ESP8266 ...