Lisa Compact
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21
Background knowledge
There is a lot to know when you want to fully understand the Lisa. Some of the more important
background information is included in this section for reference.
21.1
The general flow in Lisa devices
The Lisa is a compact device that can be used for streaming via internet and for playing from memory
card (Store-and-Forward). For a better understanding of the flow in the device, we have depicted the
high-level flow of a Lisa device in figure below.
When Remote monitoring is enabled and there is a connection to the internet or local network, the Lisa
will send log messages to the monitoring server, even when the device is off.
When powered on, the Lisa first performs the startup procedure. This takes care of some initialization
and update procedures. These are explained more in detail in
. After starting up,
the Lisa will carry on with one of its main functions, either streaming from internet or playing from card.
The 'Fallback to card' is a special case of playing audio from card and is explained in
The Task Scheduler makes it possible to remotely instruct the Lisa to perform certain tasks, such as
powering on/off, switching source etc. at given moments in time.This is covered in detail in
It is also possible to control the Lisa from a remote server, by sending it commands (like those
supported by
), over a local network or internet. This is covered in the section on
.
