Quantity   Component name
1 × Arduino Pro Mini
1 × Chip FTDI
1 × HM-10 module
1 × Li-Po battery 150mA or coin cell LIR2032
1 × Tp4056
1 × Copper pcb
3 × 10k Resistor
1 × conductive ink (silver ink)
1 × 3d printer
1 × TPU filament
1 × Velostat or some conductive sheet
1 × Polyamide film