21689_r03
11/13
WARNING!
The GSM modem must be equipped with a SIM card
active and able to send and receive SMS; before
inserting the SIM in the modem, you must disable any
PIN code request,
You can only send SMS from numbers with
international prefix Italian ("+39").
At this date, the GSM function is only for Italy.
On request, the GSM function can be implemented to
operate in other states.
TECHNICAL DATA SERIAL COMMUNICATION
-
protocol RS-232
-
baud-rate 2400 bit/s
-
use of AT commands according to standard GSM
07.07 and 07.05
-
use of 5 conductors (TX, RX, GND, DSR, CTS)
CRONO
(DTE)
MODEM
(DCE)
D-SUB 15
SIGNAL
CON. 8 POLES
Tiye Molex
90327-0308
(J2 on pcb)
CONN. DB9
CONN. 15
POLES
TX
(CT103)
7
3
2
RX
(CT104)
8
2
6
GND
2
5
9
DSR
5
6
7
CTS
6
8
11
Table 1:
Correspondence between the connector pins of
the serial cable.
Figura 3
Position connector J2 on C.S. for connection with
a GSM modem
Displaying modem status
In the line on central text of LCD display you can check the
status of the modem.
Particularly in the initial phase, if the modem is detected, if
the SIM card is active and the GSM network is present, the
screen will "automatically" appears as follows:
in addition to the usual information, there is shown the
GSM signal level (0 to 5 "levels") and the name of the
operator.
More information on communication with the modem can
be viewed by entering the submenu "RS232 Monitor"
located in "Menu parameters".
In the first page shows the status of the modem, the serial
communication (right), the name of the GSM operator and
the level of the signal.
Pushing the "Buffer" you can view the data exchanged
between the chronothermostat and modem, for diagnostic
operations.
