Product Details
– Compatible with ARDUINO, RASPBERRY PI, ARM, AVR, PIC, 8051, etc.
– Can be directly connected to computer via Serial Port (Use GSM Tester or write your own Software)
– Best suited for GSM based Microcontroller Projects (better than SIM300 and other GSM Modems)
– Option for connecting MIC and SPEAKER directly to GSM MODEM for calls (LINE IN also available)
– Supports communication through RS232 with DB9 Connector, TTL Pins & I2C Pins
– Compatible with AC / DC Adapter (AC & DC solder points also available on board)
– ON/OFF Switch for easy switch ON after inserting SIM (or keep in ON position for auto ON on powering)
– DEBUGGER Pins available
SIM900A Modem is built with Dual Band GSM/GPRS based SIM900A modem from SIMCOM. It works on frequencies 900/ 1800 MHz. SIM900A can search these two bands automatically. The frequency bands can also be set by AT Commands. The baud rate is configurable from 1200-115200 through AT command. The GSM/GPRS Modem is having internal TCP/IP stack to enable you to connect with internet via GPRS.
SIM900A is an ultra compact and reliable wireless module. This is a complete GSM/GPRS module in a SMT type and designed with a very powerful single-chip processor integrating AMR926EJ-S core, allowing you to benefit from small dimensions and cost-effective solutions.
SIM900A Features
– GPRS multi-slot class 10/8
– GPRS mobile station class B
– Compliant to GSM phase 2/2+
– Class 4 (2 W @850/ 900 MHz)
– Class 1 (1 W @ 1800/1900MHz)
– Control via AT commands (GSM 07.07, 07.05 and SIMCOM enhanced AT Commands)
Low power consumption: 1.5mA(sleep mode)
Operation temperature: -40°C to +80 °C
Specifications for GPRS Data : GPRS class 10
max. 85.6 kbps (downlink)
max. 42.8 kbps (uplink)
PBCCH (Support packet Switched Broadcast Control Channel) support
Coding schemes CS 1, 2, 3, 4
Specifications for SMS via GSM/GPRS
– Point to point MO and MT
– SMS cell broadcast
– Text and PDU mode
Software features
– 0710 MUX protocol
– Embedded TCP/UDP protocol
– FTP/HTTP
– FOTA
– MMS
– Embedded AT
Compatibility: AT cellular command interface
SIM900A RS232 + TTL BOARD Features
INPUT VOLTAGE: 12V
On Board Power LED
On Board Network LED
RS232 Serial Control (TX and RX)
Modem Reset PIN OUT
Default Baud Rate: 9600. Databits: 8, Parity: None, Stop Bit: 1
PCB Board Specifications
Material: FR4 (High Quality)
Board Thickness: 1.6mm
