10
User manual
GSM LT-2
must not repeat! (function 81 makes it possible to program the content of SMS message
informing about the status of inputs. Having received this message, the GSM LT-2 module
will send an SMS with input status information to the selected number).
•
Exit the service mode by hanging up.
In order to remotely bypass/unbypass an input by using the SMS message, do as follows:
•
using any mobile phone (or a stationary one, if equipped with the SMS function), send – to
the telephone number GSM – a text message containing the suitable
control code
(a 6-character string, without any spaces or characters not belonging to the code inside).
Recognizing the code by the module in the message body will initiate the action,
depending on which code has been sent.
It is possible to send to the module an SMS message containing the code alone, as well as
a message longer than the code itself (it can be part of a longer word – among the 32 first
characters). Thus a verbal description of the current operation can be placed into memory of
the telephone from which the control will be executed (SMS sent). This will relieve the user
from the necessity to memorize the codes or the functions realized by them.
Only one control code can be sent in one message. If there are more codes, only the first one
will be executed by the module. Sending an SMS message which contains no code
(or contains a wrongly entered code) will cause no response from the device. The control
function is executed as soon as the message is received and the control code recognized.
Once the function has been executed, the received message will be deleted and the
telephone will be ready to receive a next control SMS message.
9. M
ESSAGING
This function is related to the attendance of module’s inputs, and is activated by violation or
restoration to normal status (termination of violation) of the input, which is not bypassed.
The messages can be sent maximally to four telephone numbers. The messaging can have
a form of SMS message or CLIP.
Another form of messaging is the "test transmission". In order to inform the user of its
operability, the module will send an SMS with suitable contents, or call selected telephone
numbers within the programmed time period. Information on the status of inputs, and
telephone line availability can be attached to the SMS message (function 94).
The telephone numbers to be notified and the test transmission period can be remotely
changed by sending SMS messages to the module. Such messages must contain the proper
password and the programmable parameter (functions 27–31). The module can inform the
user that a change has been made, by sending a return SMS to the telephone number
programmed with function 26. The SMS which is then sent contains information on the
current settings (transmission period and 4 telephone numbers to be notified, also for test
transmission purpose). For the module to return the SMS, the SMS centre number must be
programmed (function 02).
The first test transmission is carried out approx. 30 seconds after completion of the module
programming; the second one: after the programmed test transmission period, or randomly
(after a period not exceeding 20 hrs, unless duration of the programmed transmission period
is shorter). Subsequent transmissions are made in accordance with the programmed
parameter. Use function 19 or 25 for programming the duration of intervals between the test
transmissions.
When programming the test transmission data, set also the "test transmission priority" option
(function 20), as required.
Checking the current module status is also possible (function 99). It will suffice to dial the
GSM telephone number and hang up after a few call signals. A moment later the module will
generate an additional test transmission (independent of those already programmed), i.e. it
