Miscellaneous

  There are two different SM5100B: DTU: http://www.cutedigi.com/product_info.php?products_id=4400 and AT mode: http://www.cutedigi.com/product_info.php?products_id=4165 The one you are reading is regular AT mode version.   DTU is much powerful than AT mode version and can be downgraded to AT mode version. here is a step-by-step guide: http://www.linksprite.com/article/shownews.php?lang=en&id=24 SM5100B shield tutorial: http://www.cutedigi.com/forum/viewtopic.php?f=22&t=5579       USA providers are all on 850/1900Mhz and pratically all the rest of the world uses 900/1800Mhz.   Spectrum SM5100B GSM/GPRS module: a miniature single-side board quad-band GSM 850/EGSM 900/DCS 1800/PCS 1900 module ready for integration in various kinds of Fix wireless phones and other wireless devices.   Temperature range Normal range: -10°C to +55°C (full compliant) Storage: -40°C to +85°C Weight < 9g Physical dimensions 35.0X39.0X2.9 mm (typical) Connection 60 pins Power supply VBAT: 3.3V to 4.2V range 3.6V typical. Power consumption Off mode: <100uA Sleep mode: <2.0mA Idle mode: <7.0mA (average) Communication mode: 350 mA (average GSM) Communication mode: 2000mA (Typical peak during TX slot GSM) Li-ion Battery charging management and interface (OPTION) Li-ion Battery charging management is included. The charger interface is provided on 60-pin connector. (only for 3.7V Li-ion Battery) Frequency bands EGSM900 +GSM850+ DCS1800+PCS1900 Transmit power Class 4 (2W) for EGSM900/GSM850 Class 1 (1W) for DCS1800/PCS1900 Supported SIM card 3V/1.8V SIM card. (auto recognise) Keyboard interface 4x6 keyboard interface is provided UART0 interface with flow control Up to 460 kbps Full hardware flow control signals (+3.0V) are provided on 60 pins. UART1 interface without flow control 2-Wire UART interface Up to 460 kbps LCD interface Support standard SPI interface Download: User manual Reference Schematics Antenna Options SMS Application Note GPRS Application Note AT commands manual   Real time GPS tracking tutorial:  http://www.cutedigi.com/forum/viewtopic.php?f=22&t=403... » read more