First, let's prepare all the components that you will need to build the line-following robot: 1 x Zumo Chasis Kit (no motors) (https://www.pololu.com/product/1418) 2 x 100:1 Micro Metal Gearmotor HP 6V (https://www.pololu.com/product/2191) 1 x Basic Sumo Blade for Zumo chassis (optional) (https://www.pololu.com/product/1410) 4 x Rechargeable NiMH AA battery: 1.2 V, 2200 mAh, 1 cell (https://www.pololu.com/product/1003) 1 x FeatherWing Doubler - Prototyping Add-on For All Feather Boards (https://www.adafruit.com/product/2890) 1 x Assembled Feather HUZZAH w/ ESP8266 Wi-Fi with Stacking Headers (https://www.adafruit.com/product/3213) 1 x DC Motor + Stepper FeatherWing Add-on For All Feather Boards (https://www.adafruit.com/product/2927 ...