16
5.
Communication via SMS messages
It is possible to control and monitor the device operation remotely via the special SMS messages,
which are being sent to the modem phone number. The user can select phone numbers, from which
the SMS messages are accepted by the modem. The factory configuration doesn’t restrict the
phone numbers for any incoming SMS messages that means any SMS messages are accepted
regardless of the sender phone number. Phone numbers restriction can be done with
the program
for data loggers
Settings of the program for data loggers to use it with the modem
Generally, SMS command messages aren’t case sensitive and the space serves as a parameter
separator.
If the accepted command isn’t supported or it hasn’t a correct syntax or parameters, the modem
will send back an SMS message with a proper error description. This information will be returned
only three times in maximum. The fourth and every next incorrect command from the one phone
number is ignored until the incoming command will be correct again.
5.1.
The query SMS messages
Using these messages, you can take the current measured values from the connected data logger,
the modem firmware version and the current modem state information.
5.1.1.
The query about the current values
To take the current measured values from the connected data logger, send the SMS message
values
to the modem.
If a data logger ATV or ATX is connected to the modem, it will send back a SMS message with
the following contents:
data logger identification
– the user’s description of the data logger is displayed. If
this description isn’t set, the serial number of the data logger will be displayed. If the
total message length would exceed 160 characters, the serial number of the data
logger will be displayed instead of the description.
measured values of single quantities –
the channel number or channel description (if
it is set) is displayed, the measured value and the quantity unit follow.
The response message example:
Logger Store_13: Temp: 24.7C Hum: 45.5%RH DP: 12.1C
If a data logger ATP is connected to the modem, it will send back a SMS message with the
following contents:
data logger location
– the user’s description of the data logger location is displayed.
If this description isn’t set, the serial number of the data logger will be displayed. If
the total message length would exceed 160 characters, the serial number of the data
logger will be displayed instead of the description.
