How does the Web Thermometer obtain its IP address?

How does the Web Thermometer obtain its IP address?

The following four alternatives are available for first assigning IP addresses to Web Thermometers. Detailed descriptions of all methods are contained in the relevant section of the manual Web-IO 1x / 2x / 8x Thermometer.

• Management and inventorying tool WuTility
  Using the Scan function of WuTility, the Web Thermometers and Web-IOs contained in the local sub-network are automatically searched for and shown in a list. Devices whose current IP address is 0.0.0.0 (= factory default setting) can then be assigned a valid address be via the button Assign IP address.
   
• Static ARP cache entry
  Via a static entry in the ARP cache of a TCP/IP computer located in the same sub-network followed by a ping. In the same way as when using WuTility, this method can only be used if the Web Thermometer does not yet have an IP address at this time.
  Input example in Windows: arp -s [IP address] [MAC address]
   
• Assignment via the serial interface
  If during the boot procedure the Web Thermometer receives a continuous data stream (data format 9600, n, 8) having the content "x" (= ASCII 120), a prompt is displayed into which it is possible to enter a new IP address. This method overwrites the current and works irrespective of whether an IP address is already assigned or not.
   
• Assignment via BOOTP / DHCP
  In centrally administered networks, the IP address can also be assigned using a DHCP or BOOTP server. This method also offers the advantage that these protocols can also be used for setting the subnet mask and the gateway address. In such centrally administered environments, beforeconnecting the Web Thermometer please contact your system administrator and ask him to reserve a fixed IP address in the DHCP system for the Com-Server.

Additional information:

• Product Info: Web Thermometer
• Manual for Web Thermometer

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