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2
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Figure 4 Rear
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Product label.
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Holes for mounting with tie wraps.
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Housing screws. Do not remove.
2.3 VaiNet Devices in viewLinc Monitoring System
VaiNet access points create links between Ethernet and Vaisala devices using the VaiNet
protocol. Wireless device registration is handled by viewLinc Enterprise Server. Whenever a
new data logger is added to the system, it is automatically identified by an access point, which
forwards the data logger’s information to the server. Once accepted in the system, data
loggers will stay synchronized, even in situations where other nearby VaiNet networks overlap.
Redundancy is achieved by allowing load distribution between VaiNet access points which
share multiple data loggers in range.
Data Transfer and Recovery From Outages
VaiNet access points continuously transfer measurement data from the data loggers to
viewLinc Enterprise Server. Both access point and viewLinc Enterprise Server verify that the
data has been received correctly. Once the data has been verified, it is stored to the secure
database where it is protected from tampering and loss.
If data flow is interrupted by a network outage, the data transfer will resume when the outage
is resolved. Local memory of the data logger is used to store the data while waiting for a
connection to viewLinc Enterprise Server. RFL100 Data Logger has enough local memory for
30 days of measurement.
2.3.1 VaiNet Protocol
Vaisala’s VaiNet wireless protocol is based on LoRa™ technology. This technology has been
licensed by Vaisala for monitoring purposes, and further enhanced additional protocol layers
to produce a robust and reliable wireless signal for environmental monitoring. The protocol is
proprietary, and cannot be used with 802.11 Wi-Fi devices. VaiNet wireless devices always
require a VaiNet wireless access point.
VaiNet radio communication uses a modulated, low-power signal at sub-GHz frequencies to
provide better signal propagation in environmental monitoring applications. VaiNet provides
all the benefits of spread spectrum wireless technology including resistance to interference,
interception and multipath fading (reflections). Using the chirp signal to spread the RF energy
over a wider band allows for reliable communications even when signal levels are below the
background noise floor. It also reduces disruptions from overlapping signals on same
frequencies.
Chapter 2 – Product Overview
9
Summary of Contents for VaiNet AP10
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