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Operation
Remote control by text messages
The 4430 unit can be controlled remotely by sending text messages to the unit.
This can be done by a normal GSM phone.
The unit has a number of commands for guiding the process. Each command is dif-
ferent and contains a letter, which assigns a property to the text message. In addi-
tion to letters, numbers 1 and 0 are used as abbreviations for the ON/OFF function.
The setting can vary, but they are explained in this section.
Note that one text message can contain a combination of several commands.
General preconditions for sending a text message:
• Use the GSM phone and write your text message.
• Start the text message with the default code 1234, and then write the com-
mand.
• Send the message to the telephone number assigned to the SIM card of the
4430 unit.
Controls
S Status message.
W Wallas heater control.
NOTE:
Spaces are permitted between commands, but PROHIBITED in the middle of a
command.
“1234 W1 S4” is CORRECT, “1234 W 1 S 4“ is INCORRECT.
Control commands
“W” – Wallas heater control
Text message commands
S4 Status command
W0 Turn the Wallas heater off (stop)
W1 Turn the Wallas heater on (start)
W2xx Set the Wallas heater temperature.
Note:
The W2 command must be sent AFTER the W0 or W1 command.
W2 can be programmed within the range of +5 – +35°C. Note that the character +
does not have to be used for controlling a Wallas.
Example:
”1234 W230” means that the temperature of Wallas is 30°C.
It takes 15 seconds from the moment of entering the command to update the S4
data. Therefore it is recommended that the ON/OFF OFF/TEMPERATURE com-
mands are sent separately with an interval of at least 15 seconds.
D30061
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