10
The modem has additional pins (GPIO) to monitor and control external devices (see section
). ATM can send SMS messages at change of pin signal strength enabling remote control of external
devices connected to the modem. The pins state can be changed sending SMS command to the modem ena-
bling remote control of external devices.
The modem features the offline mode supporting all functions except GPRS connection (see section
"Offline
mode"
). Offline mode provides economy of traffic and power consumption. It is used if there is no need for con-
tinuous connection.
ATM tracks the GSM module hang-up and provides its additional restart by a signal from the configurable
watchdog timer (see section
). GSM module rebooting can be initiated with a phone call
from a group of numbers, specified in ATM Control application (
Settings → Advanced→ WDT → Phone No.
for rebooting the module
), as well as with the SMS command "XXXX reboot", where XXXX is the access
code for service mode (5492 by default). The modem provides operation within a wide range of input voltages
and temperatures.
During its operation the modem displays messages in the log via USB interface in a real time. To view and
analyse the log on a computer, use any terminal program.
2.2. Using the Document
Modem functions are described in sections
"Service Mode", "Offline Mode", "
(Firmware)", "Setting Up the Modem", "Working with SIM Cards", "Connecting to the Server via SMS
", "Data Transmission via CSD", "Watchdog Timers", "Real-Time Clock (RTC)", "GPIO Pins Operation",
"Operating with Incoming SMS Messages"
can be applied both to
"Client"
and
"Server"
modes. In cases
when the action of a function depends on the modem operating mode, it is specified directly in the function de-
scription.
Sections
“Working with a Server”
and
"Working with the iRZ Collector Server "
can be applied to
Client
mode
only; section
Modem Operation in the Server Mode
— can be applied to
Server
mode only.
In the
CSD Only
mode the modem cannot operate as a client or a server, data can be transmitted only over
CSD. The
CSD Only
mode does not support: GPRS connection (including operation with the server), offline
mode, remote firmware updating and settings change as well as the Modbus protocol for a COM port. Other
features are supported in the same way as for the
Client
and
Server
modes.
