Controlling Peripheral Relay/Switch with Scripts

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12-28-2013

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Controlling Peripheral Relay/Switch with Scripts

Has anybody worked with writing scripts with peripheral devices such as relays and/or switches? For example, writing a script that activates/deactivates a relay switch to turn devices on and off. Or maybe writing a script that checks the status of a peripheral on/off switch to provide a remote status of an open or closed door.

Are there universal USB/Ethernet peripherals available for stuff like this?

Last edited by sudo; 12-28-2013 at 09:55 PM..

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LEARN ABOUT DEBIAN

dibbler-relay

dibbler-relay(8)						      Dibbler							  dibbler-relay(8)

NAME

       dibbler-relay - a portable DHCPv6 relay

DESCRIPTION

       dibbler-relay  is  a portable implementation of the DHCPv6 relay. DHCPv6 relays are proxies, which allow one server to support links, which
       server is not directly connected to. There are ports available for Linux 2.4/2.6 systems as well as MS Windows XP and 2003. They are freely
       available under GNU GPL version 2 (or later) license.

SYNOPSIS

       dibbler-relay [ run | start | stop | status ]

OPTIONS

       run - starts relay in the console. Relay can be closed using ctrl-c.

       start - starts relay in daemon mode.

       stop - stops running relay.

       status - shows status of the relay.

EXAMPLES

       Relay forwards DHCPv6 messages between interfaces. Messages from client are encapsulated and forwarded as RELAY_FORW messages. Replies from
       server are received as RELAY_REPL message. After decapsulation, they are being sent back to clients.

       It is vital to inform server, where this relayed message was received. DHCPv6 does this using interface-id option. This identifier must	be
       unique.	Otherwise  relays  will get confused when they will receive reply from server. Note that this id does not need to be alligned with
       system interface id (ifindex). Think about it as "ethernet segment identifier" if you are using Ethernet network or as "bss identifier"	if
       you are using 802.11 network.

       Let's  assume  this case: relay has 2 interfaces: eth0 and eth1. Clients are located on the eth1 network. Relay should receive data on that
       interface using well-known ALL_DHCP_RELAYS_AND_SERVER multicast address (ff02::1:2). Relay also listens on its  global  address	2000::123.
       Packets received on the eth1 should be forwarded on the eth0 interface, also using multicast address:

       log-level 8
       log-mode short

       iface eth0 {
	 server multicast yes
       }

       iface eth1 {
	 client multicast yes
	 client unicast 2000::123
	 interface-id 1000
       }

       Here  is another exmaple. This time messages should be forwarded from eth1 and eth3 to the eth0 interface (using multicast) and to the eth2
       interface (using server's global address 2000::546). Also clients must use multicasts (the default approach):

       iface eth0 {
	 server multicast yes
       }

       iface eth2 {
	 server unicast 2000::456
       }

       iface eth1 {
	 client multicast yes
	 interface-id 1000
       }

       iface eth3 {
	 client multicast yes
	 interface-id 1001
       }

FILES

       All files are created in the /var/lib/dibbler directory. During operation, Dibbler saves various file  in  that	directory.  Dibbler  relay
       reads /etc/dibbler/relay.conf file. Log file is named client.log.

STANDARDS

       This implementation aims at conformance to the following standards:

       RFC 3315 DHCP for IPv6

       RFC 3736 Stateless DHCPv6

BUGS

       Bugs are tracked with bugzilla, available at http://klub.com.pl/bugzilla/. If you belive you have found a bug, don't hesitate to report it.

AUTHOR

       Dibbler	was  developed as master thesis on the Technical University of Gdansk by Tomasz Mrugalski and Marek Senderski. Currently Marek has
       not enough free time, so this project is being developed by Tomasz Mrugalski. Author can be reached at thomson@klub.com.pl.

SEE ALSO

       There are dibbler-server(8) and dibbler-client(8) manual pages available. You are also advised to take a look at project website located at
       http://klub.com.pl/dhcpv6/.   As  far  as  authors know, this is the only Windows DHCPv6 stateful implementation available and the only one
       with  relay  support.  It  is  also  one  of  two  freely  available  under  Linux.  The  other	Linux  implementation  is   available	at
       http://dhcpv6.sourceforge.net, but it is rather outdated and seems not being actively developed.

GNU
								    2004-12-11							  dibbler-relay(8)

Hardware