Instructions

4
Power supplies
Kombi is powered with a 3.6V Lithium Thionyl battery pack.
The device is supplied with batteries already installed, so it is ready to be used.
Kombi can alternatively be powered with an external supply. When an external power supply is used, the
batteries can be omitted or used as a backup supply. Use the micro USB socket to connect an external
supply into the device. If the device has a particulate matter sensor (Dust13 and Dust40 models) and the
USB cable is longer than 1 m, use a good quality cable with power wires at least 0.2 mm
2
(24 AWG).
Kombi indicates the powerup by blinking the LED next to the micro USB socket.
Settings
Kombi works with its default settings and no parameter configuration is normally required. However, if it
is necessary to change the settings of the device, it can be done with Nokeval’s MekuWin software
(available for free at www.nokeval.com). Following procedure should be followed in order to get access to
the settings:
• Connect a micro USB cable to the connector, and the other end of the cable to a computer.
• If Windows requests for a driver, download it at www.nokeval.com > Support, unzip it to a
temporary folder, and show that directory as the location for the driver. If there are problems
during the installation, try pushing the button every 5-15 seconds or keeping it pressed so that
Kombi will not shut down its USB port.
• Launch the MekuWin program.
• In MekuWin, choose the right COM port from the Ports menu. If the port is not visible, try pushing
the button on Kombi to wake up the port.
• From the Port settings menu, choose Protocol = ModbusRTU, Address = 1.
• Click Direct.
• A new window will open for the settings.
The configuration menu includes the following settings:
• Protection
o Describes password protection status “None”, “Locked”, “Unlocked”.
• Password input/setup
o Unlock protection or change password. See “Protecting the settings” section below for
details.
• Period
o Time between measurements with options from ranging 5 minutes to 6 hours. Default is
30 min.
• LoRaWAN
o If Kombi is used with the Nokeval cloud platform, the default settings are ok. If you wish
to manually set the LoRaWAN credentials and/or integrate it with your cloud platform,
see “LoRaWAN settings” and “Uplink payload structure” chapters.
Protecting the settings
To protect the settings from being easily adjusted, the configuration menu provides a password box. The
password can be formed using up to 16 characters. From the next MekuWin session, the settings can’t be
adjusted without knowing the password.