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XW-111™ Wi-Fi Digital Sensor Users Manual
HTTP SERVER
HTTP Server Enabled
This option can turn the internal HTTP web server on or off when in stand-alone mode. In slave mode the
HTTP web server is automatically disabled. When the web server is on, the XW-111 can be accessed
using a web browser or the CBW Mobile app and you can view the current input status. When the web
server is off, the input status is obtained when the XW-111 transmits (pushes) the data. For example, you
can turn the web server off but get input status information through email alerts. Turning the web server
off will allow the device to make use of more power saving features. With the web server turned off, the
device will be allowed to disconnect from the Wi-Fi network or at the very least service beacons
selectively to save power.
HTTP Port
The TCP port used for HTTP communications with the XW-111 can be customized here. The default
setting for this field is 80, which is the standard HTTP port. It is recommended that the port be left
unchanged unless the user has an understanding of TCP/IP and ports.
MODBUS SERVER
Modbus Server Enabled
XW-111 can support Modbus/TCP. Modbus is a messaging structure protocol used in industrial
manufacturing control and automation. It is an open protocol and offers interoperability with software and
devices from other manufacturers. This is enabled by selecting Yes in this field. The default setting for
this field is No. (See Section 5.1: Modbus Operation for more information on using XW-111 on a Modbus
network.)
Note: Modbus communications are disabled whenever the Control Password is enabled as Modbus does
not have support for passwords.
Modbus Port
This specifies the port used for Modbus/TCP communications with XW-111. By default this is set to port
502 which is the standard Modbus port. It can be set within the range of 0 to 65535.
Endianness
32-bit data is treated as two individual 16-bit words using IEEE 754 floating point format. Floating point
format is used for reading the battery voltage.
If the Big radio button is set, the XW-111 will use big-endian architecture and the most significant 16-bit
word (big end) is sent first. If the Little radio button is selected, then the XW-111 will use little-endian
architecture, and the least significant word (little end) is sent first. The default setting is little-endian.
For example, in little-endian format, a 32-bit floating point number represented by '1234 ABCD' is sent as
'ABCD 1234'.
Xytronix Research & Design, Inc.
Web Server
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