A-II GSM Shield, GSM/GPRS/SMS/DTMF v.2.105 - for Arduino and Raspberry Pi

Description

The new version of the module working with Arduino and Raspberry Pi that provides communication in GSM and GPRS. Based on Quectel M95, it allows for voice calls, sending SMS messages and transfering data. On the board are: 2 slots for SIM-cards (dual-SIM), slot for microSD cards which allows you to save the data, output and input audio in the standard Jack 3.5 for headphones and microphone and a slot u.FL for external antenna (in our offer, you will find the appropriate adapters).

 

Specification

• Driver: Quectel M95
• Supported standards: GSM / GPRS
• Frequencies: 850 / 950 / 1800 / 1900 MHz
• Support standard DTMF
• Dual SIM option (one currently active)
• Support for AT commands
• Built-in PCB antenna capable of connecting external versionvia a connector.FL
• 5 ways of power
• UART: 2.8 V to 5 V
• The choice of power source via jumper:
  • USB
  • built-in controller 5 V
  • the input voltage VIN
• Built-in connectors:
  • for SIM ( 2 PCs of dual SIM card)
  • for the microSD memory card up to 32 GB
  • miniUSB - built-in converterUART - USB (cablesold separately)
  • Jack audio outputs to connect the headphones / speakers (870 MW)
  • Jack audio inputs Jack for a microphone
  • connector.FL for external antenna (antennasandadapters u.FL - SMA are not included)
• There are no connectors for Arduino
• System of the connector is suitable for Arduino: Uno, Leonardo, Mega 2560, Mega ADK
• It is also compatible withRaspberry Pi
• Led out RESET button of the Arduino
• Works with Raspberry Pi: 3, 2, B+, A+
• Three mounting holeswith a diameter of: 3mm
• Board sizes: 83 x 54 mm

 

Detailed module description can be found in the user guide in the first part and on the manufacturer's website. Description how to send SMS using Arduino, is available in this instruction.

 

In our offer, available is also shield A-GSM II with connectorsfor self-soldering.

The main differences between the A-GSM and A-GSM II Feature A-GSM A-GSM II The main system M85 M95- program compatible on 98 %.

The modified control signals

POWER and RESET

By default, low status

activated with high position

By default, high status

activated with low state

Connecting connectors microUSB miniUSB Working voltage of UART from 3.3 V to 5 V from 2.8 V to 5 V The number of ways of powering 3 5 The device requires a good quality of supply. We recommend the use of an external power supply of min. 5 V / 1 A when powered from USB or the 12 V / 500 mA when powered by Vin. You should not power the shield from the USB port of the computer.

 

The connection to the Arduino

The system works as a shield for Arduino, using the following conclusions:

 

Pin Arduino Description GSM RX D2 Communication via the serial interface. GSM TX D3 Communication via the serial interface. PWRKEY D7 Control of the supply voltage of system GSM (On/Off). STATUS D5 The statuspin. RESET D6 GSM system's reset.

ARD-RESET

RST Led out RESET of the Arduino.

5V

5V The supply voltage of 5 V.

Vin

Vin The input voltage Vin. GND GND The groundof the system

 

Examples of projects for Arduino:

• Home alarm system
• Smart doorbell
• Sending SMS and establishing a cal

 

Connect to the Raspberry Pi

To launch a module with the Raspberry Pi, you must perform the following connections:

 

Pin RPi Description GSM RX 08 Communication via the serial interface. GSM TX 10 Communication via the serial interface. PWRKEY 16 Control of the supply voltage of system GSM (On/Off). STATUS 12 The statuspin. RESET 18 GSM system reset.

5V

02/04 The supply voltage of 5 V. GND 06/14 The groundof the system

 

Example of programs for the Raspberry Pi:

• SMS gateway

 

Useful links

• The manufacturer's website
• User manual
• Technical documentation
• How to send SMS using Arduino
• Examples of projects
• Temperature logger
• Comparison of A-GSM and Arduino Shield
• Block diagram
• System documentation M95F