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Summary of Contents for iButton LinkHub-E
- Page 1 Users Guide An Advanced, Intelligent, Multiport Network Interface for the iButton™ and 1-Wire™ Bus 6/25/2008 Software Version 1.1i and above Copyright © 2008 by iButtonLink LLC iButton and 1-Wire are trademarks of Dallas Semiconductor Corp, Dallas, Texas, USA. 1 of 17...
- Page 2 1-Wire line driver so that existing software can use it without modification. This allows The LinkHub-E to be used in place of the Dallas DS2480B in most cases where increased performance or reliability is required. Some DS2480B functions are not emulated by the LinkHub-E, as described below.
- Page 3 The serial number will appear on 1-Wire searches unless the internal bus is deactivated. It may be conveniently used to identify the particular LinkHub-E or to verify that the 1-wire bus reading functions are working correctly.
- Page 4 LED indicators: The LinkHub-E has two LED indicators on the right side. The LED on the left is a heartbeat indicating that the LinkHub-E processor is running. While the processor is idle, the LED will illuminate at one-second intervals. The LED on the right indicates the presence of 1-Wire bus traffic.
- Page 5 “S” representing a shorted bus. Key b – Places the LinkHub-E into byte mode. The next two characters entered will be taken as a hexadecimal byte value, which is then issued onto the bus. The response byte is then displayed in hexadecimal.
- Page 6 Key z – Turn off the switched +5V line to the LinkHub-E output connectors. Key d – Turn on the switched +5V line to the LinkHub-E output connectors.
- Page 7 Channel Mask. Key \E (backslash uppercase E) – Report maximum internal EEPROM address. The LinkHub-E will respond with a 6 digit hex number which represent the address which can be specified with Read/Write EEPROM commands. The 32KB LinkHub-E has 32768 EEPROM addresses.
- Page 8 0000103 after the execution of the example. Note that the <CR> was NOT written to the EEPROM. Copyright © 2008 by iButtonLink LLC iButton and 1-Wire are trademarks of Dallas Semiconductor Corp, Dallas, Texas, USA. 8 of 17...
- Page 9 LinkHub-E occurs after the dump is complete. Key | (vertical bar) – This will cause the LinkHub-E to enter a pass-thru mode. In this mode, all activity on the serial port output line is passed through (inverted) to the 1-Wire bus, and all activity on the 1-Wire bus is passed-through (inverted) to the serial port input line.
- Page 10 The scanning system will not work properly if more than 8 iButton or 1-Wire devices are present on the bus. This is due to the limited memory available in the LinkHub-E. Questions about the LinkHub-E should be directed to info@iButtonLink.com.
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Page 11: Appendix A - 1-Wire Communications Examples
Appendix A – 1-Wire Communications Examples The sequence for reading a DS18B20 temp sensor via the LinkHub-E™ is straightforward: 1. Issue a 1-Wire reset ( 2. Enter byte mode in pull-up mode ( ) and address the ROM by sending... -
Page 12: Appendix B - Wiring Diagrams
– There is no current limiting provided on the +12V pin. Shorting this to ground will severely damage the LinkHub-E. Copyright © 2008 by iButtonLink LLC iButton and 1-Wire are trademarks of Dallas Semiconductor Corp, Dallas, Texas, USA. 12 of 17... -
Page 13: Appendix C - Network Interface Notes
This enables Telnet Mode (or Telnet Com Port Cntrl), which disables local character echoing unless the telnet client program asks for it. 3. IP Address is set to Autoconfigure, and the LinkHub-E will obtain an IP address from a DHCP server if one is available on the network, or use AutoIP to generate an address in the range of 169.254.x.x with a class B subnet mask. - Page 14 Screen shots of Web Configuration page settings Copyright © 2008 by iButtonLink LLC iButton and 1-Wire are trademarks of Dallas Semiconductor Corp, Dallas, Texas, USA. 14 of 17...
- Page 15 To use telnet configuration establish a telnet session to the LinkHub-E on port 9999. Press Enter for setup mode. Under Change Setup enter 1 for Channel 1 At Baudrate (xxxx)? enter 115200 Hit return to accept the current values until DisConnMode appears...
- Page 16 Trigger input3: X Message : Priority: L Min. notification interval: 1 s Re-notification interval : 0 s Change Setup: 0 Server Copyright © 2008 by iButtonLink LLC iButton and 1-Wire are trademarks of Dallas Semiconductor Corp, Dallas, Texas, USA. 16 of 17...
- Page 17 9 Save and exit Your choice ? 9 Parameters stored ... The XPort restarts to activate the changes, disconnecting the telnet connection. Copyright © 2008 by iButtonLink LLC iButton and 1-Wire are trademarks of Dallas Semiconductor Corp, Dallas, Texas, USA. 17 of 17...
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