3 - Introduction
Introduction
Ovazone-Core-T-…is an indoor air quality wireless transmitter and part of Nokeval Ovazone product
family. The basic model Ovazone-Core-T-RH-Lux measures temperature, humidity and illumination.
The purpose of the illumination measuring is concluding if a room (the lights) is in use and whether the
sun shines inside; it is not accurate.
When the model name has a –CO2 suffix, the device also measures carbon dioxide concentration up to
2000 ppm. This model needs to see fresh air at least once a week to be able to auto calibrate itself.
This model is not suitable for premises that are continuously occupied; such premises result carbon
dioxide measurement to show smaller values than in reality.
Ovazone-Core-Router is a device without sensors. It can be used to extend the coverage of the wireless
network as it works as a repeater.
The devices work with a battery, but they can be powered with an external 5 V power with a USB cable
or a 2-wire cable.
Ovanet is Nokeval’s second generation radio network, which uses Wirepas Connectivity technology and
Nokeval’s own additions. The network uses 2.4-2.48 GHz band, which is available all over the world. The
product names basically begin with the Ovazone prefix.
Every device in the network, also the battery powered ones, will function as a repeater by assisting
devices located far away from the gateway, effectively forming a mesh network.
The network has node devices producing measurement data, and one or more gateways. The gateway
connects the network to other systems. Examples of the gateway devices are Ovazone-Wave-Link and
Ovazone-Cell-Link. They are used to deliver the data of the radio network to the Ovaport service.
Each device, including nodes and gateways, has to be set to the same Ovanet network. The Ovanet
network number has to be chosen between 1-16777214. It should be generated with a random number
generator, to minimize the probability to accidentally choose the same network number as in another
network located nearby. By default, the devices are set to the network number 6829663, which can be
used if there are no other Ovanet or Wirepas Connectivity networks within a couple of hundred meters.
If two networks have the same number by accident, the node devices may connect to a wrong network
and the data is not delivered to the desired gateway.
Each device has a unique Ovanet address. It is set at the factory and there is no need to change it. The
address is visible in the back label of the device.
The devices automatically change their radio frequency seeking suitable frequencies in the crowded 2.4
GHz band. However, at power-up the devices need to find other devices in the network, for which a
common radio frequency is needed. All the devices of the network need to be set to the same radio
channel between 1-28. Usually the default channel 1 is ok.
There is no need to configure any other radio network settings. The network searches automatically for
the best connections and updates them if needed.
The open space range between the nodes is about 200 meters and indoor range is some tens of meters
depending on the construction materials. Placing the devices near a metal surface will decrease the
range.
