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Instruction sheet 727 100
3.11 WiFi settings
In order for Power Analyser CASSY to be found more easily in
WiFi, it has a name. The standard name for this is "PA-XXX",
where "XXX" is replaced by the last three numbers of the seri
al number. This name can be modified with Mobile Config (see
section 5.1) and is used by Power Analyser CASSY e.g. as
the name of the access point, as the DHCP host name and as
the name in the apps (see section 5).
Power Analyser CASSY supports three different WiFi modes:
•
Disabled
•
Access point as the standard default setting. A different
name for the access point and a password can be en
tered using Mobile Config (see section 5.1). The three op
erating modes can be distinguished between by the dis
played symbol:
: No connection established to access point.
: A device is connected.
: An app is connected (see section 5).
Connecting to a Power Analyser CASSY access point is
→
particularly easy:
ever, a terminal then always has connection to exactly
one Power Analyser CASSY and usually no more Internet
access.
•
Client for connection to a router. The access data of the
router (SSID and password) can be entered using Mobile
Config (see section 5.1). The three operating modes can
be distinguished between by the displayed symbol:
: The connection to the router is being established or
has failed. If a connection to the router has not been sig
nalled after 30 seconds, check the SSID and password of
the router.
: The connection to the router has been established.
The better the reception is, the more bars displayed.
: An app is connected (see section 5). The better the
reception is, the more bars are displayed.
For security reasons, the Power Analyser CASSY will not
reveal the connection data to the router via a QR code.
3.12 Server
The Power Analyser CASSY runs several servers, some of
which support multiple simultaneous connections.
Note: These servers provide unencrypted connections, which,
for security reasons, should therefore only be used within a lo
cal network.
TCP server
A TCP client, such as the CASSY App (see section 5.6) and
CASSY Lab 2 for Drives and Power Systems (see sec
tion 5.7), control the measurement recording of a Power
Analyser CASSY and display the results. Only one connection
is possible simultaneously, and only if there is no USB con
nection.
HTTP server
For the delivery of the Power Analyser CASSY Web App (see
section 5.4) to a browser, e.g., on a smartphone. In this case,
the Power Analyser CASSY controls the measurement itself.
WebSocket server
For the distribution of the measured values of the Power
Analyser CASSY to up to four WebSocket clients. A WebSock
et client is often embedded in a web page, such as Mobile
Control or the Power Analyser CASSY Web App (see sec
tions 5.3 and 5.4). Our Lab Docs of the Student Experimental
Literature also include WebSocket clients that allow up to four
→
Show QR code
AP data. How
Tel: +49-2233-604-0 · Fax: +49-2233-604-222 · Email: info@ld-didactic.de · Technical alterations reserved
students to collaborate on a Power Analyser CASSY experi
ment, using their tablets (see sections 5.5 and 5.6).
To simplify a WebSocket connection, a PIN that can be found
to the left of the
or
, which can be entered instead of the
IP address or the CASSY name in the address field of a Lab
Doc. This PIN can be modified or disabled in Mobile Config
(see section 5.1).
To keep track of the number of WebSocket connections, they
are counted to the right of the green
nections to the Power Analyser CASSY Web App, to Mobile
Control, and to a Lab Doc. When all four connections are es
tablished, the display of the PIN disappears since no further
connection is possible.
VNC server
A VNC client connected to the VNC server transmits the
screen content and enables remote control of the Power
Analyser CASSY (see section 5.5). Only one VNC client can
be used at a time.
3.13 MAC address
For some networks, the MAC address must be specified be
fore Power Analyser CASSY can connect to the network.
There are different ways to obtain the MAC address of a Pow
er Analyser CASSY:
•
Mobile Config (see section 5.1) displays the MAC ad
dress in the status line when the Power Analyser CASSY
is connected via USB.
•
The Power Analyser CASSY Web App (see section 5.4)
shows the MAC address in the System menu.
•
The Bonjour Discovery App on a smartphone or tablet
displays the MAC addresses of all Power Analyser
CASSYs on the same network under the HTTP services
in the form, CASSY-name-XXXXXXXXXXXXX. This is
useful for determining the MAC addresses of several
Power Analyser CASSYs at the same time.
3.14 Additional settings
The settings can be modified in the menu or can be temporari
ly or permanently configured using Mobile Config (see sec
tion 5.1) on the computer.
Activate screenshots
If screenshots are activated, these can be made by touching
the OK button for 2 seconds.
A screenshot can either be saved to a USB memory stick with
FAT formatting or to the Screenshots sub-folder on the internal
SD card. It is only possible to write to the internal SD card
when the Power Analyser CASSY unit is NOT connected to a
computer.
A successful screenshot is indicated by an audible signal iden
tical to a normal key tone. An unsuccessful screenshot (e.g.
when the internal SD card is currently being accessed by a
computer) is indicated by a higher pitched and longer tone.
If a Power Analyser CASSY unit is connected to a computer
via USB, then it is possible to read and write to the SD card
from the computer.
The saved bitmap file (*.bmp) can be read using multiple com
monplace programs.
Diagram available
If the diagram is disabled, then with the key
able to toggle to the table. Depending on what the object of
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or
. It counts all con
you are only
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