LX20B – Manual Page 61 / 67
9. RECEIVING OF SMS MESSAGE
GPRS module receives specially prepared SMS. If received SMS is not correct it will
be automatically cancelled and device will not operate any action. The device uses
an encrypted protocol for transmission.
9.1. DESCRIPTION OF THE PROTOCOL
The following format of message is acceptable allowing to send some commands
with one SMS (every command shall be separated with SPACE ):
SERVICE CODE█COMMAND█COMMAND█..........
Where:
SERVICE CODE - device service code
█ - SPACE
COMMAND - order (see the table below)
List of commands:
Disconnects active TCP connection.
Resets device. Note: all unsent events will be lost.
Turn on or turn off outputs. outNr specifies output
number (0 for OUT1, 1 for OUT2), state specifies
requested output state (0 – switched off, 1 – switched
on).
Examples:
OUT=1,0 – output OUT2 off
OUT=1,1 – output OUT2 on
Issues AT command to GSM modem and sends
response back. Optional timeout parameter defines
time for modem response. Time determined in
seconds and ranges from 1-30 seconds. If timeout
isn’t specified, 3 seconds is assumed.
Returns device description, serial number
(hexadecimal number) and firmware version.
Returns device status.
The message content depends on what was
configured at the programming stage in the "SMS
Notifications" tab, the "Status" submenu.
In reply about status a device shall send one SMS
message containing proper text defining inter alia
actual output , input state, power supply, phone line.
GETSIMSTATUS
(only for LX20B-5D model)
Returns SIM cards status.
Format of the message: SIMX, 1: Y, 2: Y
where X is the number of the active SIM card (1 or
2), and Y the status of SIM cards, where: OK - the
card works correctly, ERROR - there is a SIM card
error, UNKNOWN - the device do not known status of
the SIM card due to did not switched to the second
card yet.
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