Eclipse.org - Device Kit
A
signal is a
report
or notification from a
hardware device.
The following is a list of common signals that maybe supported by a
hardware device:
- A property signal reporting the current value of a property or attribute.
- A status signal reporting the status of the
hardware device.
- A status signal reporting the status of an operation.
- An event signal reporting a notification of an event.
When a
message received from a
hardware device
via the
transport correspond to a particular
signal, then the signal will be triggered.
When a signal is trigger, any
applications or agents that have interested in
this signal will be notified.
Some signals, like a property signal, contain data that will be provided to the application
when the signal is triggered.
A
measurement associated with a property signal will maintain the last received property
value.
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