| DCF77RX | Receive DCF77 frames and convert them to std::tm structure. |
| RcSwitchReceiver | Receive data from 433/315Mhz remote controls. |
| RcSwitchTransmitter | Transmit 433/315Mhz remote control codes. |
| RtcDueRcf | Operate Arduinio Due RTC using C++ standards; no RTC/CPU race conditions; auto adjust RTC alarms upon daylight saving transitions. |