Quantity   Component name
1 × WeMos ESP8266 module
1 × WeMos battery shield To power via a LiPo
1 × Si7021 Adafruit temperature and humidity breakout board
5 × Red SMD 0805 LEDs To display the humidity levels on-board when pressed a button
4 × M2 spacers
1 × 3.7V 1200mAh LiPo battery
1 × 74HC595 Shift register SOIC-16 shift register to enable 5 LEDs