@fennsen I used an ESP32 WROOM NodeMCU. So it is most likely that the RTC capabilities differ to that of the SP8266 NodeMCU 1.0 (ESP-12E). Unfortunately I am currently on vacation until mid of next week and not able to do any further investigations. By the end of next week, I can provide more details. Hope to be at least some help. Please note that my use of OS rain delay differs to the original weather.py usage.