Quantity   Component name
1 × D1 Mini ESP8266 module Wemos D1 Mini V2 or Wemos D1 Mini Pro
3 × SN74HC4066N Switches and MultiplAnalog Switch ICs Quad Bilateralexers / Analog Switches and Multiplexers
2 × DB9 female 9 Position D-Sub Receptacle, Female Sockets Connector, Through Hole, Right Angle Solder
1 × Barrel jack Power Barrel Connector Jack 2.00mm ID (0.079"), 5.50mm OD (0.217") Through Hole, Right Angle
1 × 1N4001 diode Diode Standard 50V 1A Through Hole DO-41