Things you will need

First, you should prepare with the following things to build the Wi-Fi controlled mini round robot:

• 1 x Mini 3-Layer Round Robot Chassis Kit (https://www.adafruit.com/product/3244)
• 1 x ESP8266 ESP-01 board (https://www.sparkfun.com/products/13678)
• 1 x Arduino UNO - R3 (https://www.sparkfun.com/products/13678)
• 1 x SparkFun Logic Level Converter - Bi-Directional (https://www.sparkfun.com/products/12009)
• 1 x SparkFun Motor Driver - Dual TB6612FNG (1 A) (https://www.sparkfun.com/products/9457)
• 1 x Half-size breadboard (https://www.adafruit.com/product/64)
• Few hookup wires
• 1 x 9V battery holder with switch and 5.5mm/2.1mm plug (https://www.adafruit.com/product/67)
• 1 x Alkaline 9V Battery (https://www.adafruit.com/product/1321)
• 1 x 4 x AA battery holder with an on/off switch (https://www.adafruit.com/product/830)
• 1 x Alkaline AA batteries (LR6) - 4 pack (https...