Bo Mạch Phát Triển Maib Sim900 Gprs / Gsm Cho Arduino Quad-band

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Feature:
-The 4 frequency module is available worldwide.
-Provides 2 antenna interfaces for compatibility with various needs.
-Adapt to various main control boards.
-The serial port is perfectly compatible with the Arduino microcontroller. The TTL serial port is compatible with 3.3V and 5V microcontrollers.
-GPRS Shield is based on SIM900 module and is compatible with Arduino and its clones.
-GPRS Shield gives you a way to communicate using a GSM mobile phone network.
-The shield allows you to implement SMS, MMS, GPRS and audio via UART by sending AT commands (GSM 07.07, 07.05 and SIMCOM enhanced AT commands).
-The board also features 12 GPIOs, 2 PWM and SIM900 module ADCs (both 2V8 logic).

Specification:
Item Type:GPRS/GSM Shield
Quad-Band: 850/900/1800/1900 MHz - for GSM Networks in All Countries Worldwide.
GPRS Multi-Slot Level: 10/8
GPRS Mobile Station: Class B
GSM Compliant: 2/2 +
Level 4 (2 W @ 850/900 MHz)
Level 1 (1 W @ 1800 / 1900MHz)
Control Via AT Commands - Standard Commands: GSM 07.07 and 07.05
Enhanced Command: SIMCOM AT Command.
Short Message Service - Allows You to Send Small Amounts Of Data Over The Network (ASCII Or Raw Hex).
Embedded TCP / UDP Stack - Allows You to Upload Data to a Web Server.
Support For RTC.
Optional Serial Port.
Speaker And Headphone Jack
Low Power Consumption - 1.5mA (Sleep Mode)
Temperature Range -: -40°C To +85°C

Package List:
1 x Module
1 x Antenna

Note:
The computer can debug USB--TTL. The power supply of this module is: 5V-26V. If it is 5V power supply, it must be above 2A. It is recommended that 9V power supply. After plugging in the Arduino board, the power supply must be able to supply 2A. The reason is that the GPRS Shield startup current and the maximum peak current required to work up to 2A, but the USB port can not provide such a large current, so the external power supply equipment must be provided. Another power supply port header leads to a 3.7--4.5V power supply for lithium battery p