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LEGO Wireless Protocol v3 device¶

class LWP3Device(hub_kind, name=None, timeout=10000, pair=False, num_notifications=8, connect=True)¶

Connects to a hub running official LEGO firmware using the LEGO Wireless Protocol v3.

Parameters:

hub_kind (int) – The hub type identifier of the hub to connect to.
name (str) – The name of the hub to connect to or None to connect to any hub.
timeout (int) – The time, in milliseconds, to wait for a connection before raising an exception.
pair (bool) – Whether to attempt pairing for a secure connection. This is required for some newer hubs.
num_notifications (int) – Number of incoming messages from the remote hub to store before discarding older messages.
connect (bool) – Choose False to skip connecting. connect() can be called later to connect.

Changed in version 3.6: Added pair parameter.

Changed in version 3.7: Added num_notifications parameter.

awaitconnect()¶

Connects to the device. Only needed if you disconnected or initialized with connect=False.

name(name)¶

name() → str

Sets or gets the Bluetooth name of the device.

Parameters:: name (str) – New Bluetooth name of the device. If no name is given, this method returns the current name.
Raises:: OSError – If the device is not connected.

awaitwrite(buf)¶

Sends a message to the remote hub.

Parameters:

buf (bytes) – The raw binary message to send. Maximum 20 bytes.

Raises:

read() → bytes | None¶

Retrieves the oldest buffered message received from the remote hub.

If all buffered messages have already been read, this returns None.

Returns:: The oldest raw binary message or None if there are no more messages.

Changed in version 3.7: Now supports reading multiple buffered messages instead of blocking until one new message was received.

awaitdisconnect()¶

Disconnects the device.