GSM3 click

With GSM3 click you can have two of the most used wireless communication protocols in one device — GSM/GPRS and Bluetooth. The click has an onboard 2.4 GHz active antenna, so it is Bluetooth compatible. It carries the SIM800H quad-band GPS/GPRS module from SIMCOM.

GSM3 click is designed to use either 3.3V or 5V power supply and communicates with the target MCU over UART and the following mikroBUS pins: PWM, INT, AN, RST, CS.

Onboard antennas

The click has an SMA antenna connector and an audio input/output pad for connecting a microphone and earphones (which can also be used as an FM antenna).

Quad-band module

SIM800H has world-wide coverage — quad-band frequency: GSM 850, EGSM 900, DCS 1800 and PCS 1900. The module can search four frequency bands automatically.

Low power consumption

Typical power consumption in sleep mode is only 0.7mA. While in sleep mode the SIM800H can still receive SMS.

Key features

• SIM800H module
  • GPRS data downlink/uplink transfer max: 85.6 kbps
  • Supports GPRS coding schemes CS-1, CS-2, CS-3 and CS-4
  • Integrated TCP/IP protocol stack
  • Supports SIM card: 1.8V, 3V
  • Bluetooth antenna pad
• Connection pad for audio input/output
• Interface: UART
• 3.3V or 5V power supply

Specification

Pinout diagram

This table shows how the pinout on GSM3 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin	mikroBUStm				Pin	Notes
Power on status	STAT	1	AN	PWM	16	PWRKEY	Power on/down of the module
Hardware reset of the module	RST	2	RST	INT	15	CTS	Request to send
Clear 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

Programming

Code examples that demonstrate the usage of GSM3 click with MikroElektronika hardware, written for mikroC, mikroBasic and mikroPascal for PIC are available on Libstock.

Libstock also hosts an alternative extensive GSM library for a variety of hardware setups and with a detailed user manual.

This code snippet shows the initialization routine for the GSM3 click, when used with AT parser.

 1 void GSM3_init( void )
2 {
3 engine_init( gsm_default_handler );
4 hal_gsm_pwr( 0 );
5 Delay_ms( 100 );
6 hal_gsm_pwr( 1 );
7 Delay_ms( 2000 );
8 hal_gsm_pwr( 0 );
9 
10 while( !hal_gsm_stat() );
11 Delay_ms( 10000 );
12 
13 at_cmd( "AT" );
14 at_cmd( "AT+CSCS="GSM"" );
15 at_cmd( "AT+CMGF=1" );
16 }