Bluetooth, WiFi or GSM shield to communicate with Android

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eco_bach

Member
Dec 14, 2013
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Building a custom Android telephony application that will send simple signals on call received to an arduino. No voice data, just simple data to flash lights, etc. From both a hardware and software point of view, which option will be both the easiest and most reliable to implement

1)An Arduino Bluetooth shield
2) An Arduino WiFi shield
3)An Arduino GSM shield