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cbus Documentation, Release 0.1-dev

Applications

Running ontop of the C-Bus protocols are applications.

This package provides encoders and decoders for application-level messages on the C-Bus network.

Application messages inside of C-Bus packets are called “Speciﬁc Application Language”, or SALs for short. A

packet may contain many SALs for a single application, up to the MTU of the C-Bus network.

Clock and Timekeeping Application

The Clock and Timekeeping Application is used to provide access to date and time information to CBus units.

This is used for example in conjunction with programmable units that act differently depending on the time or date,

and with touchscreen units that may display the time on their screens.

Please refer to this document in conjunction with the Clock and Timekeeping Application Guide published by Clipsal.

class cbus.protocol.application.clock.ClockApplication

Bases: object

This class is called in the cbus.protocol.applications.APPLICATIONS dict in order to describe how to decode

clock and timekeeping application events recieved from the network.

Do not call this class directly.

classmethod decode_sal(data, packet)

Decodes a clock and timekeeping application packet and returns it’s SAL(s).

class cbus.protocol.application.clock.ClockSAL(packet=None)

Bases: object

Base type for clock and timekeeping application SALs.

This should not be called directly by your code!

Use one of the subclasses of cbus.protocol.clock.ClockSAL instead.

classmethod decode(data, packet)

Decodes a clock broadcast application packet and returns it’s SAL(s).

Parameters

• data (str) – SAL data to be parsed.

• packet (cbus.protocol.base_packet.BasePacket) – The packet that this data is associated

with.

Returns The SAL messages contained within the given data.

Return type list of cbus.protocol.application.clock.ClockSAL

encode()

Encodes the SAL into a format for sending over the C-Bus network.

class cbus.protocol.application.clock.ClockUpdateSAL(packet, variable, val)

Bases: cbus.protocol.application.clock.ClockSAL

Clock update event SAL.

Informs the network of the current time.

Creates a new SAL Clock update message.

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