Campbell NL241, Instruction Manual

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NL241 Wireless Network Link Interface
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FIGURE 6-1. Infrastructure network
Create a Network:
The NL241 can be configured to create a network. In this mode, it acts as the
access point which other Wi-Fi enabled devices can join. If this configuration
is enabled, the user may set an SSID (network name) and password. If a
password is supplied, the network created will be secured by WPA2
encryption. If no password is supplied, the network created will be an open
network with no encryption.
If this mode is selected, the channel may be specified manually using the
Channel setting in the Settings Editor . If the Channel setting is left at the
default setting Auto, the device will select a channel on which to operate that
has minimal interference from other networks detected in the area. A network
created by the NL241 supports up to 8 joinees.
DHCP Server in a Created Network
When configured to Create a Network , the device will run a DHCP server to
assign addresses to joinees of the network. The beginning address of the DHCP
server pool is the address of the device plus 100. In the case that the device
address ends in 135 or above, the beginning address of the DHCP server pool
is the address of the device minus 100. There are 20 entries in the DHCP server
pool, thus the ending address in the pool is the beginning address plus 20. By
default, the device uses a server address of 192.168.67.1. In this case, the pool
of addresses is 192.168.67.101 – 192.168.67.120. If the device address is
192.168.67.135, the pool of addresses would be 192.168.67.35 –
192.168.67.55. Any connecting devices running a DHCP client will be
assigned an address in this range. If static IP addressing is desired, assign
addresses outside of the range of the DHCP address pool (while observing the
network mask).
If an IP address is supplied in the IP Address user setting, that address will be
used as the DHCP server address. The beginning address in the DHCP server
pool will still be the address of the server plus or minus 100. The ending
address in the pool will be the beginning address plus 20.
6.3 RSSI
RSSI is received signal strength indication. It is a generic radio receiver
technology metric used to determine the strength of the link between a receiver
and a transmitter. In the case of the NL241, RSSI is the measurement between
the NL241 and a wireless access point. The strength of this link is recorded in
dBm (power ratio in decibels) and can be found on the Wi-Fi tab in the
Settings Editor of DevConfig .