Quantity   Component name
1 × ESP32
1 × Nextion Display NX4024T032
1 × Mini Pump JQB2438274
2 × Normally open mini air solenoids
2 × TO-220 FET For driving the pump and solenoid
1 × Logic level shifter
1 × Mini MP1584EN DC-DC Buck Converter For 5v step down from batteries
2 × 18650 + balancer charger