KERN RS-232 User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Installation manual
RS-232 Bluetooth adapter
KERN YKI-02
Version 1.0
12/2014
GB
YKI-02-BA-e-1410

2 YKI-02-BA-e-1410
GB
KERN YKI-02
Version 1.0 12/2014
Operating instructions
RS-232 Bluetooth adapter
Contents
1Scope of delivery .....................................................................................................3
2Requirements...........................................................................................................3
3Use ............................................................................................................................3
4Connecting the adapter...........................................................................................4
4.1 Connection to the RS-232 device ...........................................................................4
4.2 Powering the adapter...............................................................................................4
5Configuration ...........................................................................................................5
5.1 Software installation................................................................................................5
5.2 Basic configuration of the adapter.........................................................................5
5.2.1 Connecting and reading the device settings......................................................6
5.2.2 Changing the RS-232 communication parameters............................................7
5.3 Using the adapter with laptops/tablets/smartphones...........................................8
5.4 Using the adapter with printers or other passive devices....................................9
6Instant help.............................................................................................................12

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1 Scope of delivery
Delivery includes:
1. RS-232 Bluetooth adapter
2. Mains adapter (EU/UK/US)
3. USB cable (USB A to USB Mini-B, ~0.5m)
4. DE-9 adapter male-male (gender changer)
5. CD with complete documentation (English) and software (English)
6. KERN installation instructions (German/English) in paper format (this document)
If one the articles listed above is missing please contact your supplier immediately.
2 Requirements
For the configuration of the adapter a computer with the following hardware and software
is required:
- built-in or external RS-232 interface
(e.g. USB-RS232 adapter like KERN AFH 12)
- Microsoft Windows operating system (Windows XP or higher)
3 Use
The RS232-Bluetooth adapter enables a device with a regular RS-232 interface to
wirelessly communicate with modern laptop, tablet, smartphone, printer or any other
device with a Bluetooth interface. Possible uses for this interconnectivity are:
Wireless read-out or control of typical measurement devices with an RS-232
interface like balances from a Bluetooth-enabled device (provided that suitable
software for the application is available).
Wireless connection of a typical measurement device with an RS-232 to a
Bluetooth printer.
Cable replacement: Wireless transmission of serial data between two RS-232
interfaces using two paired RS-232 Bluetooth adapters.
In this installation manual, the configuration of the adapter for the first two applications is
described in detail in the following chapters.

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4 Connecting the adapter
4.1 Connection to the RS-232 device
For most target devices, the Bluetooth adapter can directly plugged into the corresponding
D-sub connector of the device. When the target device has a female DE-9 connection, the
yellow „gender changer“ adapter (included in the delivery) has to be used.
If the target device has a standard pin-out, the „DCE-DTE“ switch can
be used to switch the adapter between emulating a DTE (data terminal
equipement, e.g. a computer) or a DCE (data communication
equipment, e.g. a modem). In particular, this swaps the send (TxD) and
receive (RxD) lines of the adapter.
If the target device has an unconventional pin-out, the proper interface
cable has to be used to connect the device to the adapter.
When connecting the adapter to a regular computer, the adapter can be plugged
in directly and the DCE-DTE switch has to be set to DCE.
4.2 Powering the adapter
The Bluetooth adapter can be powered using one of the following methods:
a) Using the included plug-in power supply:
Install the proper country-specific plug into the power supply. Connect the cable
with the USB Mini-B connector of the adapter. Then plug the power supply into the
mains.
b) Using an USB connection:
You can power the adapter from regular USB port by using a USB A to Mini-B cable
(included).
c) Using the RS-232 port‘s Pin 9:
The adapter can be powered directly over the RS-232 interface. This requires that
the target device provides a voltage in the range of 4V –13V (max. 90mA) on pin 9
of the RS-232 port.
For the configuration of the adapter, the adapter still can be powered over the USB
port.

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5 Configuration
To configure the adapter for your use case, you need a computer with Microsoft Windows
operating system and an RS-232 interface. Additionally, the configuration software
contained on the included CD has to be installed.
5.1 Software installation
Before using the configuration software, it has to be installed on the computer:
Place the included CD into the CD drive of your computer.
Open the drive in the Windows Explorer (e.g. D:\)
Start the executable setup file (exe) by double-clicking it.
The installation requires administrator rights.
Confirm the dialogs of the setup with „Next“.
Complete the installation.
After installation, you can start the software via the Windows start menu:
5.2 Basic configuration of the adapter
Regardless of the individual application, the RS-232 communication parameters of the
adapter and the target device always have to match.
The factory settings of the adapter are:
- Baud Rate: 19200 Bd
- Parity: none
- Flow control: disabled
- Stop Bits: one
Reset to factory defaults:
If you have problems connecting to or configuring the adapter, please try to reset
the adapter to the factory defaults using the following steps:
1) Power the adapter using one of the previously described methods
2) Use a pointed object to press the reset button for 3 seconds until all 3
LEDs flash 3 times.

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5.2.1 Connecting and reading the device settings
At start of the configuration software, the main settings dialog appears:
Before any setting can be changed, the current settings have to be read from the adapter
using the following steps:
Connect the adapter to the RS-232 port of your computer.
Set the DCE-DTE switch to „DCE“.
Start the configuration software.
Make sure that the input fields „COM Port“, „Baudrate“, „Parity“, „Flow Control“
and „Stop Bits“ correlate with the actual settings of the adapter. The software
starts with the factory settings. Therefore, the settings usually don’t have to be
changed when setting the adapter up for the first time.

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Push the button „Read Settings“:
When successful, the output console shows the following messages:
In case of errors, make sure that the DCE-DTE switch is set to DCE and the
communication parameters match with the actual adapter settings. If no connection can be
established, please reset the adapter to the factory settings (see above).
5.2.2 Changing the RS-232 communication parameters
The RS-232 communication parameters of the adapter have to match the ones of the
target device. The following steps explain how the parameters of the adapter can be
changed accordingly:
The default communication parameters of KERN balances differ from the factory
presets of the Bluetooth adapter.
The default settings for most KERN balances are:
9600 Bd, 8 data bits, no parity, 1 stop bit
Please consider the balance usage manual for the actual factory settings.
Read the current settings of the adapter (see above).
Change the communication parameters to match the ones of the target device:

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Push the button „Save Settings“ to apply the new settings.
Check the output console of the configuration software:
5.3 Using the adapter with laptops/tablets/smartphones
To use the adapter to access the target device from other Bluetooth-enabled devices (for
exmaple, accessing a balance from a tablet), the adapter has to be configured as „slave“.
This is the factory preset (with the device name “SerialADT” and pin code “1234”.
To change the device mode, name and pin code, proceed with the following steps:
Read the current settings of the adapter (see above).
Make sure the adapter‘s communication parameters match the ones of the target
device (see above)
Make sure the „Device Mode“ is set to „Slave“ and the „Discoverable Mode“ is set
to „Discoverable“:
Enter the desired device name and pin code. Bluetooth
service discoveries will list the adapter by this name. To pair
the host device with the Bluetooth adapter, the pin code has
to be known and entered correctly.

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The changes will be applied by pressing „Save Settings“:
Connect the adapter with the target device as described above
You now can pair the target device with your laptop/tablet/smartphone (using the
Bluetooth service discovery).
Use a software supporting the Bluetooth serial port profile (SPP) to read-out and
control the target device wirelessly.
5.4 Using the adapter with printers or other passive devices
The master mode allows to use the adapter with a passive Bluetooth device like printers.
In this case, the connection has to be initiated (“pairing”) by the adapter, using the device
name and pin code of the target device / printer. The following explain how to set up a
connection between a scale and a Bluetooth printer KERN YKC-01:
Read the current settings of the adapter (see above).
Make sure the adapter‘s communication parameters match the ones of the target
device (see above)
Make sure the „Device Mode“ is set to „Master”:
Enter the pin code of the target device
(for the printer example it has to be set to „0000“):
Uncheck the checkbox „Auto-Connect“:

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The changes will be applied by pressing „Save Settings“:
Switch to the dialog „Connection“:

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Push the button „Inquire Devices“ to start searching for Bluetooth devices:
Bluetooth devices in the vicinity will be listed in the results list:
You may cancel the inquiry as soon as the desired target device (in this case the
DPP-250) appears in the results list.
Select the target device in the list and press the button “Connect”:
As soon as the connection is established, the following message shows.
The blue status LED on the adapter has to light continuously.
Disconnect the adapter from the computer and connect it to the target device
(e.g. a balance). Remember to adjust the setting of the DCE-DTE switch as
needed.
The measurement device is now wirelessly connected to the printer.
When the devices become disconnected again (for example, due to power loss), the
connection has to be established again.

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The adapter can also be set-up to automatically connect to the printer again. Follow the
next steps (while the adapter is connected to the computer) to set-up the automatic
connection:
After inquiry, the adapter’s Bluetooth address is displayed in the result list of the
“Connection”dialog.
Copy the Bluetooth adress from this field to the field “Bonded Address”on the
dialog “Local Device Settings”:
Enable the checkbox „Auto-Connect“ (see above).
The changes will be applied by pressing „Save Settings“:
With these settings, the adapter will regularly try to reestablish the connection to the
device according to the “Bonded Address”.
6 Instant help
Symptom
Remedy
The “Power” LED fails
to illuminate.
Check whether the adapter is connected to the power supply and
to the mains correctly.
A fault occurs during
configuration.
Try to reset the adapter to the factory defaults and reconfigure the
adapter.
Incorrect characters are
produced.
The measuring device
does not respond to
commands.
Check to see if the previous points apply and whether the RS-232
settings of the adapter match the settings of the measurement
device.
If you are unable to remedy the error, please contact your supplier.