Switching conditions and SMS sending
At a weather station UNIKLIMA® vario, equipped with a GSM/GPRS modem, SMS
messages can be defined parallel to the ON or OFF switching conditions. In
this way critical states, warnings, alarm notifications or status reports
are currently available as SMS over a mobile telephone.
If the respective switching condition is reached a SMS once is sent,
consisting of the name of the station, followed by a text that was entered
by the user, the current measured values and the states of switching
conditions. The use of the special keyword ("DOUT") in a sending
command includes the current switching states and conditions into the SMS.
Each up to 10 different phone numbers and text messages can be entered by
the user and then be saved. By the SMS sending command is defined which text
messages and which additional data shall be sent to which phone numbers. The
additional data are selected by keywords and can be combined with the text
messages and phone numbers to sending commands in any way.
key words for additional, dynamically generated data
If the automatically generated SMS exceeds the
permissible number of 160 characters, it is divided into two SMS and
both of them are sent to the phone numbers. The maximum number of
characters per sending command therefore is limited to 320 characters.
This further SMS operation mode, which can be used alone
or virtually parallel to the mode described above, realizes an automatic SMS
If a SMS featuring the keyword "weather" is
sent to the weather station by a user, the station answers an automatic SMS
containing the current weather data. Since the GSM modem must cover both the
PPP server and the two SMS modes of operation, it can last up to 2 min until
the response can be sent. An established PPP connection always has the
highest priority so that SMS operation is not possible while the PPP
connection is active.