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There are two different SM5100B:
DTU:
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:
SM5100B shield tutorial:
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.
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Temperature range
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Normal range: -10°C to +55°C (full compliant)
Storage: -40°C to +85°C
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Weight
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< 9g
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Physical dimensions
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35.0X39.0X2.9 mm (typical)
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Connection
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60 pins
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Power supply
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VBAT: 3.3V to 4.2V range, 3.6V typical.
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Power consumption
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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)
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Li-ion Battery charging management and interface (OPTION)
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Li-ion Battery charging management is included. The charger interface is provided on 60-pin connector. (only for 3.7V Li-ion Battery)
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Frequency bands
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EGSM900 +GSM850+ DCS1800+PCS1900
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Transmit power
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Class 4 (2W) for EGSM900/GSM850
Class 1 (1W) for DCS1800/PCS1900
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Supported SIM card
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3V/1.8V SIM card. (auto recognise)
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Keyboard interface
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4x6 keyboard interface is provided
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UART0 interface with flow control
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Up to 460 kbps
Full hardware flow control signals (+3.0V) are provided on 60 pins.
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UART1 interface without flow control
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2-Wire UART interface
Up to 460 kbps
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LCD interface
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Support standard SPI interface
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Download:
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