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Getting sensor data to the internet

#Satellite ##Iridium satellite * satellite modem network that has had a monopoly for a while, lots of .gov use. * Range-- everywhere outdoors, some indoor locations. * CONS: $$$$ FYI, lowest cost option is $0.20 for a 50-character text. EXAMPLES: * #Direct RF to Internet ##Wi-fi (Internet at a coffee shop near you.) * Range- 300 ft on the best of days - * Benefits - pretty widely available, familiar, localize * Not-so-beneficial - often private, limited range, device can get forced out (this is why routers need resetting) ##GSM (the mobile phone protocol.) * Range - pretty much line of site to tower. * Benefits - Its EVERYWHERE (see: Verizon commercial), * CONS: Cost much money per message * ISSUES: There are a million standards * WHERE TO FIND COVERAGE #RF Data Transfer ##Zigbee (Xbee) [IEEE 802.15 standard.]( * Pro: Mid-range depending on router placement, only one device (router) needs access to the internet. Arduino libraries available. * CONS: Not simple to set up ##[APRS]( * Requires amateur radio license. * no encrypted transmissions/ all data public * no commercial content ##900Mhz radio * like older wireless handset phones/baby monitors/garage door openers * Crowded frequency band, but good distance, higher power. * example: ##[bluetooth:]( * short range protocol supported by a range of devices, available as microcontroller serial modems. ##[bluetooth LE:]( blue tooth low energy is a new bluetooth standard supported by fewer devices. Now integrated into some system on a chip packages from ARM. ##[NFC]( very short range, low power system built on RFID. ...

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