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13.5 SIM CREDIT REQUEST CONFIGURATION (FOR “PAY-AS-YOU-GO” CONTRACTS)
The GSM chronothermostat 01913, after preliminary configuration via SMS, is able to make remaining
credit requests to the telephone carrier of the SIm card used on the device and redirect them to the
user making the request� This function obviously applies only to pay-as-you-go contracts, where the
operator provides the service of sending SMS messages that give the remaining credit after a call has
been made or an SMS sent to a specific number for such requests�
13.5.1 Setting credit request parameters
The necessary operator parameters for subsequently requesting the remaining credit can be saved on
the communicator after sending the following SMS setting message:
<code>.SIMCREDITSET.<RequestType>.<credit_num>.<sms_string_request_
credit>
<RequestType>:
'C' or 'S'� This is the method specified by the SIMcard carrier for requesting
and receiving remaining credit SMS messages via the number specified in the next field
<credit_
num>
�
Specifically:
if
<RequestType>
= C
the carrier specifies that receiving remaining credit SMS messages is
dependant on a voice call (C) to the number <credit_num>�
If
<RequestType>
=S
the carrier specifies that receiving remaining credit SMS messages is
dependant on sending an SMS request message to the number
<credit_num>
containing the
predefined string in the body of the message identified by the field
<sms_string_request_
credit>
�
<credit_num>
: number that the operator requires for requesting the credit and having an answer
via SMS�
<sms_string_request_credit>:
entered only for requests via SMS (RequestType = S)�
This setting command does not require an SMS confirmation message�
Examples with the three major Italian operators
While the user code is the default one (1234), the current configuration SMS messages are (remember
that the parameters given below might change in the future at the operator's discretion)�
• TIM SIMcard:
1234.SIMCREDITSET.S.4916.PRE CRE SIN
• VODAFONE SIMcard:
1234.SIMCREDITSET.C.404
• WIND SIMcard:
1234.SIMCREDITSET.C.*123#
