Ibutton

OVERVIEW

This is a very fast and simple explanation of using these tools for the
Dallas Semi 1921 iButton.  These instructions may help you run other
such ibutton devices.

COMPILE AND INSTALL

./configure <your parameters or `-help' for options listing>
make install

USAGE

The fisrt thing you will want to do is search your serial port for all
of the devices on the serial bus.  First start by setting your
MLAN_DEVICE environment variable so that the serial port is known:

	(t)csh:
	setenv MLAN_DEVICE /dev/tty00

	(ba)sh:
	MLAN_DEVICE=/dev/tty00
	export MLAN_DEVICE

	Note: For Linux OSes, your first serial port may be /dev/ttyS0
	Note: If you receive permission denied errors, please see your
		system administrator for appropriate permissions assignment
		for your user.

This should result in output similar to:

	$ ./search
	Serial[0]:  xxxxxxxxxxxxxxxx -- DS1921 Thermochron
	Serial[1]:  xxxxxxxxxxxxxxxx -- DS9097u 1-wire to RS232 converter
	$

	Note: "xxxxxxxxxxxxxxxx" will be replaced by your serial numbers

With these serial numbers and your serial port, you are all ready to
go.  First you must set up your ibutton to have a mission.  A mission
is simply telling the ibutton what to

APPS

search

	Takes no required parameters but does require that the MLAN_DEVICE
	environment variable points to the serial device
	(default: /dev/tty00) which has the ibutton bus.

	-r
		check for missions on each of the devices on the bus

1921mission

	Sets the mission (sampling rate) for the device.  This takes one
	required parameter as the <serial number> for the device to
	mission.

	<serial number>
		The serial number of the device to set a mission for

	-r
		Rollover.  When the ibutton reaches it's memory maximum, start
		writing over the oldest entry.  Round-robin fashion.

	-s <sample rate>
		The rate of sampling.  This is in minutes.

	-d <mission delay>
		The number of minutes to delay before taking samples.
			The number of minutes to delay before taking samples.

	-l <low alert>

	-h <high alert>


sample_devices

	Polls all devices on the bus for changes and logs them to a log
	file.  Optionally, the changes can also be published to a multicast
	group.

	-b <busdev>
		Serial device containing the bus to poll (i.e. /dev/tty00)

	-l <logfile>
		File to write log entries.  These are general logs.

	-c <logdir>
		Directory to write individual snapshots.  These will be named the
		serial number of the ibutton device and will be located in this
		directory.


1921dump

	Dumps all setting for the mission as well as the current statistics
	and data stored on the device.

	<serial number>
		The serial number of the device to retrieve all the settings
		for.