Description:
The GPRS (General Packet Radio Service) Shield is a new nonvoice value added service that delivers GSM/GPRS 850/900/[zasłonięte]/1900MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption. It is controlled via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands), and fully compatible with Seeeduino/Arduino and Mega. The GPRS Shield has 12 GPIOs 2 PWMs and 1 ADC(They are all 2V8 logic).

Features:

• Quad-Band 850/ 900/ 1800/ 1900 MHz
• GPRS multi-slot class 10/8
• GPRS mobile station class B
• Compliant to GSM phase 2/2+
• Class 4 (2 W @850/ 900 MHz)
• Class 1 (1 W @ 1800/1900MHz)
• Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands)
• Low power consumption: 1.5mA(sleep mode)
• Operation temperature: -40°C to +85 °C
• Documents

What's New From Ver1.0 to Ver1.2

The "Soft-Switch" was added from GPRS Shield Ver1.0 to Ver1.2:

You can open / close the shield by pressing the switch button or in your firmware.

As the timing of turn on/off , a >1s pulse was need to trigger the truning, and a >3.2s delay was need to get the timing stable. add the following code in your firmware to turn on / off the shield without pressing the button:

pinMode(9, OUTPUT);
digitalWrite(9,LOW);
delay(1000);
digitalWrite(9,HIGH);
delay(2500);
digitalWrite(9,LOW);
delay(3500);

Please visit  wiki page for more info about this product.

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