Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 169)

Section 7. Installation
169
Figure 54: Preconfigured HTML Home Page
7.8.2.3 Custom HTTP Web Server
Although the default home page cannot be accessed by the user for editing, it can
be replaced with the HTML code of a customized web page. To replace the
default home page, save the new home page under the name default.html and copy
it to the datalogger. It can be copied to a CR800 drive with File Control. Deleting
default.html will cause the CR800 to use its original, default home page.
The CR800 can be programmed to generate HTML or XML code that can be
viewed by the web browser. CRBasic example HTML
(p. 171)
shows how to use the
CRBasic instructions WebPageBegin() / WebPageEnd and HTTPOut() to
create HTML code. Note that for HTML code requiring the use of quotation
marks, CHR(34) is used, while regular quotation marks are used to define the
beginning and end of alphanumeric strings inside the parentheses of the
HTTPOut() instruction. For additional information, see the CRBasic Editor Help.
In this example program, the default home page was replaced by using the
WebPageBegin() instruction to create a file called default.html. The new default
home page created by the program appears as shown in figure Home Page
Created Using WebPageBegin() Instruction
(p. 170)
.
The Campbell Scientific logo in the web page comes from a file called
SHIELDWEB2.JPG. That file must be transferred to the CR800 CPU: drive
using File Control. The CR800 can then access the graphic for display on the
web page.
A second web page, shown in figure Customized Numeric-Monitor Web Page
(p.
170)
called monitor.html was created by the example program that contains links
to the CR800 data tables.