GSM2 click

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  • MIKROE-1375
  • MIKROE-1375
  GSM2 click  is the simplest way to add GSM/GPRS communication layer to your...more
Product information "GSM2 click"


GSM2 click is the simplest way to add GSM/GPRS communication layer to your project, for fast transmission of data, voice, and SMS. It features the Quectel quad-band M95 FA GSM/GPRS module that has an integrated TCP/IP protocol stack, serial multiplexer and enhanced AT commands. The board contains a quadrupole audio/microphone jack, an SMA antenna connector, as well as a SIM card socket.

GSM2 click is designed to run on either 3.3V or 5V power supply and communicates with the MCU over UART and the following pins on the mikroBUS™ line: INT, PWM, CS, RST and AN.

Note: the antenna is sold separately.

Quad-band frequencies

The M95 FA supports quad-band frequencies — GSM850MHz, GSM900MHz, DCS1800MHz or PCS1900MHz. The module can search these frequency bands automatically.

GPRS data transfer

The GPRS data uplink and downlink transfer is 85.6 kbps, which is high enough for multimedia messaging.

Power consumption

The power consumption of the M95 FA is really low — 1.3 mA in sleep mode.

For more information about the power consumption, see the module’s datasheet.

SMD jumper

There is one zero-ohm SMD jumper J1 used to select whether 3.3V (default) or 5V I/O voltage level is used. Note that, regardless of the logic level, the module requires a 5V power supply in both cases.

Key features

  • M95 FA from Quectel
    • Quad-band frequency
    • 85.6 kbps GPRS data transfer
    •  Power consumption: 1.3 mA in sleep mode
  • On-board SMA connector
  • SIM card socket integrated at the bottom side of the board
  • 3.5mm quadrupole earphone/microphone jack
  • UART interface
  • 3.3V or 5V power supply


Type GSM
Applications GSM Click™ with it’s Quectel M95 FA GSM/GPRS module is ideal for mobile devices
On-board modules Quectel M95 FA GSM/GPRS
Key Features GENERAL: Quad-band 850, 900, 1800, 1900MHz. DATA: supports PPP/ TCP/ UDP/ HTTP/ FTP/ SMTP/ SSL protocol stacks with Max. 85.6kbps (uplink & downlink).
Key Benefits SIM card socket integrated at the bottom side of the board
Interface GPIO,UART
Input Voltage 3.3V or 5V
Compatibility mikroBUS
Click board size L (57.15 x 25.4 mm)

Pinout diagram

This table shows how the pinout on GSM2 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

NotesPinMikrobus logo.png


Indicate module’s operating status STAT 1 AN PWM 16 RI Ring indication
Power on/off key PWRKEY 2 RST INT 15 CTS Clear to send
Request to send RTS 3 CS TX 14 TXD Transmit data
Not connected NC 4 SCK RX 13 RXD Receive data
Not coneected NC 5 MISO SCL 12 NC Not connected
Not connected NC 6 MOSI SDA 11 NC Not connected
Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
Ground GND 8 GND GND 9 GND Ground


Code examples for GSM2 click, written for MikroElektronika hardware and compilers are available on Libstock.

The library for GSM 2 click uses the AT parser is to analyze the responses from the module. Depending on the analyzed string, the execution of a user-defined callback function can be implemented for unique user-specific requirements. The following code snippet shows how the GSM engine is initialized. The function calls the initialization of AT adapter, timer and parser. This should be done before executing any other function.

 1 void gsm_engine_init( at_cmd_cb default_callback )
2 {
3     at_adapter_init();
4     at_timer_init();
5     at_parser_init();
7     at_cmd_save( "+CMS ERROR :", DEFAULT_TIMEOUT, default_callback,
8                                                   default_callback,
9                                                   default_callback,
10                                                   default_callback );
12     exception_f = false;
13     response_f  = false;
14     cue_f       = false;
16     cb_default = default_callback;
18     memset( ( void* )tx_buffer, 0, AT_TRANSFER_SIZE );
19 }


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