Description

Description:

GPRS Shield power supply 5V
Size: 68.33×53.09mm (same size as Arduino UNO)
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)
Dimensions: 24 * 24 * 3mm
Weight: 3.4g
Control via AT commands (GSM 07.07, 07.05 and SIMCOM enhanced AT Commands) SIM application toolkit
Supply voltage range: 3.1 … 4.8V
Low power consumption: 1.5mA (sleep mode)
Operation temperature: -40 ° C to 85 ° C

Features:
Fully compatible Arduino UNO and Mega2560 development board series
Serial communication, free choice of hardware serial port (D0 / D1) or software serial port (D2 / D3) and motherboard communication
SIM900, all IO ports all set aside, not only UART port, DEBUG port, including all the GPIO port and KEY, PANEL and other interfaces
On-board supercapacitors ensure RTC operation
At the same time support hardware and software switch, support hardware and software restart 4 Bandwidth, 850/900/1800/1900 MHz

Precautions:
After plugging in the Arduino board, you must also be connected to our 9V DC at the same time. The reason is GPRS Shield boot current and maximum peak current work needs to 2A, but the USB port can not provide such a large current, it must be an external power supply equipment. Make sure your SIM card is not locked GPRS Shield communication baud rate is the best 19200 bps 8-N-1 (GPRS Shield default auto-pairing baud rate)

Package included: 
1pc GPRS/GSM Shield -EFCom
1pc 4 Frequency Antenna
1pc 9V 1A AC/DC Power Adapter