- 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.
Direct RF to Internet
(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)
(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 http://www.mobileworldlive.com/maps
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
- Requires amateur radio license.
- no encrypted transmissions/ all data public
- no commercial content
- like older wireless handset phones/baby monitors/garage door openers
- Crowded frequency band, but good distance, higher power.
- example: http://www.freaklabsstore.com/index.php?main_page=product_info&products_id=211
- short range protocol supported by a range of devices, available as microcontroller serial modems.
blue tooth low energy is a new bluetooth standard supported by fewer devices. Now integrated into some system on a chip packages from ARM.
very short range, low power system built on RFID.