BOXFINDER (0001) User’s Manual
RSA “Galileosky”, LLC.
Page
13
9.
Connecting external peripheral
9.1.
Connecting 1Wire sensors
It is possible to connect different 1-Wire interface sensors. They can work simultaneously. To work with 1-
Wire interface, universal input should be set-up for “1-Wire” mode.
9.1.1.
Connecting iButton (DS1990, DS1982) identification key
There are several identification key applications:
•
driver identification;
•
trailer detachment identification.
In the same way, it is possible to connect devices emulating iButton, for example, RFID-codes readers.
The Tracker can support up to 8 identification keys with certain identifiers or two identification keys with
any identifier.
When using a microSD card, up to 1000 IK with certain identifier are supported.
By identification key applying to IN and GND contacts (”
) the key number is entered
into the memory and four lower bytes are sent to the server without checksum. By key disconnection the
number turns to zero.
Eight key identifiers can be set using iButtons command (section
) or in the Configurator on
“Settings\Digital inputs tab”. You should enter 4 lower bytes of iButton key number without checksum, in
hexadecimal system.
For example, full key hexadecimal number:
09 91 02 0
С
00 00 00 5
С
, where
09 – type of device (in this case, it is DS1982, for DS1990 – 01),
91 02 0
С
00 00 00
– unique number,
5C – the checksum.
In this case,
91 02 0
С
00
must be entered.
By identification key applying with one of the certain identifiers, a correspondent bit will be set in iButton
connection status field. You may control it on the “Device” tab in the Configurator. Checking 1-Wire bus is
carried out only once while leaving the “sleepmode” by the Tracker.
DS18S20
iButton
IN
GND
iButton