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U3 LED WLA/WMK J3 J2 J1 Sensor inputs and power Figure 24-7 Weblink PC server. Serial port STAMP programming cable
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Setup and operation of the multichannel network alarm system are quite straightforward. First you will need to decide which configuration you will be using. Do you wish to view the alarm conditions via a web page with a self-contained system or do you have an always-on computer running that can be used to send alarm conditions to a remote computer by e-mail or File Transfer Protocol (FTP) If you elect to use the self-contained mini web-server module option, you must first have an always-on Ethernet connection such as Road Runner Cable modem service or DSL. The diagram in Fig. 24-8 illustrates the mini web-server module installed on the main Weblink monitor system board. Plug the WSM into the main Weblink board. Note the proper orientation of the WSM: the serial number in the top right corner faces the STAMP 2. The Weblink mini web server is preloaded with a 12-channel status monitor web page. You will first need to figure out what types of sensors or switches you wish to use as input devices. Sensors inputs and power are connected at the bottom of the circuit board at J1 and J2. Remember, J2 is provided in the event that you wish to build a sensor input daughter board. Next, you will need to connect your sensors and a 9- to 12-V power supply or wall wart. Connect your programming cable between a PC or laptop and your Weblink board at J3; see Fig. 24-9. First you will need to locate the Windows STAMP 2 editor program called STAMPW.EXE. Next you will need to connect up the programming cable between your programming PC and the Weblink board. Now locate and install the program titled WLINK1.BS2 (Listing 24-1), and load the program into the STAMP 2. Your always-on Ethernet connection is now plugged into the Weblink board, at the RJ-45 jack. Once the controller is powered up and the Ethernet connection established, your Weblink monitor
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U3 LED WLA/WMK J3 J2 J1 Sensor inputs and power Figure 24-8 Weblink web-server module. Serial port STAMP programming cable
SETTING UP AND OPERATING THE SYSTEM 333
J3-4
J3-3
J3-2
J3-1 Header
9-pin female
Figure 24-9 STAMP programming cable J3.
alarm is ready for operation. Note there is a reset switch for both STAMP 2 and the mini server module, if you encounter a system start-up problem. If you elect to use the Weblink monitoring system to remotely view alarm conditions, you will need to load the software into the Siteplayer or WSM. Note the SWM Weblink software is on the supplied CD-ROM. In order to install the Weblink software into the WSM, you will need to obtain a Siteplayer development board available at $99.95 and the WSM module at $29.95 from http:www.siteplayer.com. Two other options are also available: You can obtain the WSM preprogrammed for $45.00 from josh@petruzz.net or have your own WSM programmed for $15.95 plus $6.00 shipping.
IDENTIFYING NETWORK LOCATION
If you have elected to use the Weblink monitor system board with the WSM server, you will need to identify its location on the network, and this can be tricky, depending on your network configuration. If you anticipate using the Weblink monitoring system behind a Linksys 4-port router/switch, then you will need go to the Linksys web page on board the router, via your browser, go to the main page, then advanced, then forwarding. In the service port range column, you type the port number that will be translated to a Weblink (for this example use 2001); then type the FIXED IP address of the Weblink on the internal network. You must fix the IP address of the Weblink or else it could wander around with Dynamic Host Configuration Protocol (DHCP) and get lost. Now you have attached the outside port 2001 to the inside IP address of the Weblink. From the outside world you then surf the Weblink by typing http://xxx.xxx.xxx.xxx:2001, where xxx.xxx.xxx.xxx is your outside world IP address. The Linksys will translate this port request to the following: http://inside.Weblink.ip.address:2001. Since the Weblink responds to all ports, the 2001 request is just like any other normal HTTP port 80 request. You can do this with up to 10 entries in the Linksys table. (I thought you could do more, but it seems that they have limited it.) The only wrinkle that I see is that if you are using PPoe for your DSL connection, this may not work, since the PPoe connection is not always direct. You may be going through some routers in your ISP. Try forwarding port 80 in the Linksys to your PC s internal IP address and run WeblinkPC. If someone can surf WeblinkPC from the outside world, then you should be able to surf the hardware Weblinks.
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