If I had such a project I would definetly use GSM devices, may be SMS message sending but prefferably GPRS that is now very cheep (at least in my country) about 15 Euros per month per 10Mb traffic.
Ioannis
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If I had such a project I would definetly use GSM devices, may be SMS message sending but prefferably GPRS that is now very cheep (at least in my country) about 15 Euros per month per 10Mb traffic.
Ioannis
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