1. Maqueen info

Warning

v2 microbits are required for the module used here.
v1 microbits lack the memory space for the maqueen module.
For product info:
See: https://wiki.dfrobot.com/micro_Maqueen_for_micro_bit_SKU_ROB0148-EN
See: https://edu.dfrobot.com/makelog-308323.html
The DFRobot micro: Maqueen has 2 independent motors, 2 infrared line sensors for line tracking, distance sensors for obstacle avoidance, 4 ZIP LEDs and a buzzer, all powered by 3 AAA batteries.
The servo outputs and infrared sensor on pin16 are not used here.
maqueen
Dimensions 81mm x 85 mm x 44mm

1.1. Pins

The pin numbers used to control different parts are below.

Pin

Purpose

pin0

Buzzer

pin1

Ultrasonic Trigger

pin2

Ultrasonic Echo

pin8

Left Red LED

pin12

Right Red LED

pin13

Left Line Follow (IR)

pin14

Right Line Follow (IR)

pin15

4x LEDs

pin16

InfraRed

pin19

Motor (via I2C)

pin20

Motor (via I2C)

Servo Connection is also by I2C