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GSM/GRPS shield (via Arduino)   Arduino comes with a hefty helping of unique features, but using some of them is easier said than done. Example; GSM linkup is available but using it along with GPRS and TCP communications is difficult, so Telefonica has made a physical add-on "shield" to bypass all comm issues.  It allows developers to use services that connect machines using Telefonica’s M2M (machine-to-machine) technology, as well as communicating using SMS and voice calls via ...

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