Call initialize device once before any other block. It enables the board over I2C and sets the motor PWM period. After that, use the blocks below for motors, servos, function pins, the battery, and sensors.
A detailed MakeCode tutorial is available here: https://wiki.dfrobot.com/mbt0044/
Choose motor M1, M2, M3, M4, or all, a direction (forward or backward), and a speed from 0 to 255. read battery percentage returns the raw battery level from 0 to 255, not a 0–100 percentage. stop motor stops one motor or all motors.
expansionBoard.initialize()
expansionBoard.controlMotor(expansionBoard.MyEnumMotor.M1, expansionBoard.MyEnumDir.Forward, 128)
basic.showNumber(expansionBoard.readBattery())
basic.pause(1000)
expansionBoard.stopMotor(expansionBoard.MyEnumMotor.M1)
Servo ports are S1 to S4.
- A 180° standard servo takes an angle from 0 to 180.
- A 360° positional servo takes an angle from 0 to 360.
- A 360° continuous rotation servo takes a direction and a speed from 0 to 100. Use stop 360 continuous rotation servo to stop it.
expansionBoard.initialize()
expansionBoard.servoStandardRun(expansionBoard.Servos.S1, 90)
expansionBoard.servoPositionalRun(expansionBoard.Servos.S2, 180)
expansionBoard.setContinuousRotation(expansionBoard.Servos.S3, expansionBoard.Servo360Direction.Forward, 50)
basic.pause(1000)
expansionBoard.stopContinuousRotation(expansionBoard.Servos.S3)
Function pins are C0, C1, and C2. Set the pin mode before writing a level or reading a value. Modes are ADC, DHT11, DHT22, DS18B20, digital out, and digital in.
For digital output, set the mode to digital out, then write low or high. For a sensor, set the matching mode, then read the value type you need (analog, digital in, temperature, or humidity).
expansionBoard.initialize()
expansionBoard.setPinMode(expansionBoard.PinNumber.C1, expansionBoard.PinMode.WriteGpio)
expansionBoard.setGpioState(expansionBoard.PinNumber.C1, expansionBoard.PinState.High)
expansionBoard.setPinMode(expansionBoard.PinNumber.C0, expansionBoard.PinMode.DHT11)
basic.forever(function () {
serial.writeLine("T:" + expansionBoard.readSensor(expansionBoard.PinNumber.C0, expansionBoard.SensorType.DHT11Temperature))
serial.writeLine("H:" + expansionBoard.readSensor(expansionBoard.PinNumber.C0, expansionBoard.SensorType.DHT11Humidity))
basic.pause(1000)
})
MIT
Copyright (c) 2026 DFRobot
- for PXT/microbit