SIM900A GSM/GPRS Module Compact Size

SIM900A GSM/GPRS Module Compact Size
Ref. Doc. : Tutorial
Schmatic : Circuit Diagram
AT Command : um_sim900a.pdf
Sales Price : RM65.50


SIM900A GSM/GPRS Module is a dual-band module that works on frequencies EGSM 900MHZ and DCS1800MHz. It features GPRS multi-slot class 10/8(optional) and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.

SIM900A is designed with power saving techinique so that current consumption is as low as 1.0mA in sleep mode. It integrates TCP/IP protocol and extended TCP/IP AT Commands which are very useful for data transfer applications.

SIM900A Features

Frequency bandsDual band 900MHz/1800MHz
Transmitting powerClass 4(2W) at EGSM900
Class 1(1W) at DCS1800
GPRS connectivityGPRS multi-slot class 10(default)
GPRS multi-slot class 8(option)
Temperature rangeNormal operation: -30°C ~ +80°C
GPRS dataGPRS data downlink transfer: max. 85.6kbps
GPRS data uplink transfer: max. 42.8kbps
Coding scheme: CS-1, CS-2, CS-3 and CS-4
Integrate the TCP/IP protocol
Support Packet Broadcast Control Channel(PBCCH)
CSDSupport CSD transmission
SMSMT, MO, CB, Text and PDU mode
FAXGroup 3 Class 1

Module Features

Commnunication InterfaceRS232 port and TTL port
Support AT commands
Support RTS/CTS hardware flow control
Support 1200bps ~ 115200bps
Support debug port
Antenna interfaceSMA port
Operating voltageDC5
Power consumption12 ~ 90mA@12V

Working with Arduino Uno

1. Tutorial for Arduino GSM.
2. Easyly connect to Arduino Uno: pin2 to TXD; pin3 to RXD, 5V to VCC_MCU and GND to GND.