Lisa LCD 47
8
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.
8.1 Configuration update
It is important to realize when the configuration of the Lisa is actually updated. By default the Lisa uses
Device portal as its source of configuration. Because this is a web application, changes made on Device
portal are not immediately applied to the Lisa.This is true for all cases where the Lisa uses a web source
for its configuration (e.g., ADP).
The Lisa retrieves its configuration from the web resource (e.g., Device portal, or ADP) in the following
cases:
At startup (either power on or restart)
When a task is scheduled with this command (see Task scheduling)
When the update configuration command is sent to the Lisa via one of the methods available to send
commands to the Lisa (see Controlling the Lisa with commands)
8.2 The 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.
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