Quantity   Component name
1 × Arduino Pro Micro Servo and motor control
1 × HC-06 Bluetooth connection between the phone and Arduino
1 × L298N Dual H-bridge motor controller for the robot's wheel motors
1 × 3A UBEC Power regulator
1 × 1300mAh 11.1V LiPo battery Power source for all the components (except the phone)
1 × Medium servo Phone tilt mechanism
1 × DFRobot 4WD Robot platform with four motors
1 × HTC One Relaying commands from MQTT to the Arduino and running Skype