Data download from GSM01MD
The GSM01MD module allow to download in a faster and automatic way the data stored in the thermorecorder which it is connected and to get it always possible everywhere there is GSM network.
The module can be used in 2 way:
1) If you need only an SMS alarm for "out thermostat threshold", for "generic fault" or for "record appened" it is enought a simply SIM (rechargeable or not). In this mode, the cost of the service is only for each SMS sent, or the cost of the agreement that the user will accept for the SMS managements.
2) If the user need to add the data transmission too, the SIM to use need another "data number". Now there are DATA SIM or "M2M" (machine to machine) that don't allow voice call but only data transmission and SMS. This type of card are cheaper and are developed for these applications. At this point it's necessary to explain that every kind of SIM it's used the call will be always on GSM network and not on GPRS. This it means that the SIM of the GSM module don't pay anything (except for SMS sent) and all the cost of the transmission will be charged to the "calling modem" (connected to PC) who can be GSM or normal telephone network.
At the last it is good to explain that there are 2 request to send to the thermorecorder:
1) It's the state of the thermorecorder, like personal code, date-time, temperature and alarm conditions. This operation need about 13 seconds (real connection).
2) It's the memory data download. The process need about 175 seconds (real connection) and at the last will be possible to store the data in the database of the program.
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