Having a weather station at home is very useful. The most important information is the indoor temperature. Required partsWeMos D1 mini (ESP8266)DS18B20: digital thermometerMAX7221: LED display driver7 segments LED: 4 digits common cathode4.7 kΩ resistor: 1-Wire pull-up resistor10 kΩ resistor: LED brightnessMicro USB power supplyThe WeMos D1 mini