If you have a microcontroller and you want to measure temperature, the DS18B20 is one of the most popular digital temperature sensor chips to use. Being a digital sensor, it can avoid many pitfalls of ...

A port for DS18B20 temperature sensor; A port for TSOP1838 infrared receiver module; A APC220 wireless module interface (serial/UART interface) Here is a circuit diagram of the multifunction shield ...