Quantity   Component name
1 × ESP8266-12 ESP8266 microcontroller
1 × 3.7V 1000mAh lithium battery
1 × TP4056/DW-01 Lithium battery charger and protection circuit
1 × MCP1700-3302E LDO 3.3v voltage regulator
2 × 1uF capacitor
1 × 1N4001 Discrete Semiconductors / Diodes and Rectifiers