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Web Server
Security
Type of authentication used by the access point for connections.
Security Key
Enter the security key or password for the Wi-Fi network that the XW-111 should connect to. (Hidden
when not applicable)
IP SETTINGS
Use DHCP
This option allows DHCP to be enabled or disabled. If this option is set to Yes, the XW-111 will wait for an
IP address from a DHCP server each time it is powered. The default setting is No (this is recommended
for most installations). If DHCP is set to Yes, the Network page must be submitted and the XW-111 must
be rebooted before an IP address will be assigned. Once the XW-111 is assigned an IP address by the
DHCP, the new IP address can be found through the clients list kept by the DHCP server. For most
instances, this is found on the local gateway or router. Alternatively, the device will broadcast its
information via mDNS. By not using DHCP, battery life is extended as the device does not expend energy
for transmitting requests and receiving responses every time it connects to the Wi-Fi network.
Brief Notes About DHCP: All devices on an IP network require an IP address. This is a unique address
that identifies each device on the network. DHCP (Dynamic Host Control Protocol) is a mechanism that
automatically assigns an IP address to a computer (or other devices) when it is connected to a network.
This eliminates the need to manually enter the IP address. When a computer is connected to the
network, another device on the network called a DHCP server detects the presence of the computer and
dynamically assigns the IP address to that computer. On many small networks, the DHCP server is built
into the router.
DHCP works well for "client" devices such as computers, but is not ideal for servers. This is because
servers usually don't initiate communications with other devices, but rather they wait for a request from
"clients." To make this request, the client must know the IP address of the server. If a server gets its IP
address dynamically, the IP address may not always be the same so client devices may not be able to
find the server. For this reason, servers usually use an IP address that is fixed and does not change. The
XW-111 is a server and manual IP address assignment is usually recommended.
IP Address
Enter the IP address for the XW-111 in this field. The IP address is specific to the network where the XW-
111 will be installed and is obtained from the network administrator. The default setting for this field is
192.168.1.2.
Subnet Mask
The subnet mask defines the size of the local network. This can be obtained from the network
administrator. For additional information about sub-netting and IP networking, many tutorials are
available on the Internet. The default setting for this field is 255.255.255.0.
Gateway
This specifies the IP address of the gateway router. This can be obtained from the network administrator.
The default setting for this field is 192.168.1.1.
DNS Server
The IP address of the DNS server is specified here. When DNS services are required, this is the address
that will be used. The default setting for this field is 192.168.1.1. An alternate DNS server is not
supported.
Page 14
XW-111™ Wi-Fi Digital Sensor Users Manual
Xytronix Research & Design, Inc.
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