wedo2-python 0.1.5

A lightweight and modern Python library for controlling the LEGO WeDo 2.0 Smart Hub using Bluetooth Low Energy.

WeDo2 Python Library

A Python library for controlling the LEGO WeDo 2.0 Smart Hub using Bluetooth Low Energy (BLE).
This project uses the bleak library to communicate with motors, sensors, lights and sound functions on the WeDo 2.0 hub.

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Features

• Connect to the WeDo 2.0 hub by name
• Control motors (run, stop, brake)
• Read tilt sensor
• Read distance sensor
• Control the LED light (preset colors + RGB)
• Play notes, frequencies and melodies
• Read battery level
• Detect connected devices automatically
• Turn off or disconnect the hub

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Installation

pip install wedo2-python

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Basic Usage

from wedo2 import WeDo2Hub

hub = WeDo2Hub('WeDo 2.0')

print('Hub name:', hub.name())
print('Battery:', hub.get_battery_level())

hub.disconnect()

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Class: WeDo2Hub

Connecting to the hub

hub = WeDo2('WeDo 2.0')

Rename the hub

hub.name('MyHubName')

Read the name of the hub

name = hub.name()
print(name) -> "MyHubName"

Disconnect the hub

hub.disconnect()

Turn off the hub

hub.shut_off()

Read battery level

level = hub.get_battery_level()
print(level)

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Motor

Run the motor

hub.motor.run(50, port=1)   # Speed from -100 to 100

Stop the motor

hub.motor.stop(port=1)

Brake the motor

hub.motor.brake(port=1)

Set motor port explicitly

hub.motor.set_port(2)

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Distance Sensor

Read distance (0–10 cm)

d = hub.distance_sensor.distance(port=1)
print('Distance:', d)

Read number of triggers

t = hub.distance_sensor.times(port=1)
print('Triggered:', t)

Set sensor port

hub.distance_sensor.set_port(2)

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Tilt Sensor

Read tilt direction

position = hub.tilt_sensor.tilt(port=1)
print(position)

Set tilt sensor port

hub.tilt_sensor.set_port(2)

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Light

Turn on a preset color

Available colors:
off, pink, purple, blue, sky blue, teal, green, yellow, orange, red, white

hub.light.on('red')

Use integer color

hub.light.on(3)   # blue

RGB color

hub.light.rgb(255, 120, 0)  # orange-ish

Turn off

hub.light.off()

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Sound

Play a musical note

Format: C4, D#5, Gb3

hub.sound.note('C4', 500)

Play a beep at frequency

hub.sound.beeb(800, 300)

Play a melody

hub.sound.melody([
    ('C4', 300),
    ('E4', 300),
    ('G4', 500),
    '.',
    ('C5', 800)
])

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Raw Commands (Advanced)

Raw output

hub.write_raw_output(b'\x06\x04\x01\x09')

Raw input

hub.write_raw_input(b'\x01\x02\x06\x17\x00\x01\x00\x00\x00\x02\x01')

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License

MIT License

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Acknowledgements

• LEGO for the WeDo 2.0 system
• https://ofalcao.pt/blog/series/wedo-2-0-reverse-engineering for information about WeDo2 uuids and commands
• bleak library for BLE communication

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