Simcom

GSM/GPRS Modem-RS232 is built with Dual Band GSM/GPRS engine- SIM900A, works on frequencies MHz. The modem supports RS232 interface which allows you to connect to PC as well as microcontroller with. The baud rate is configurable from through AT command. This GSM/GPRS Modem is having internal TCP/IP stack to enable you to connect with internet via GPRS. It is suitable for SMS, Voice as well as DATA transfer application

Specifications: GSM SIM900A USB SHIELD GSM/GPRS Module: SIMCOM SIM900A On board Interfaces USB (usb to serial using CP) RS232 with MAX232 TTL pin breakout (RXD,TXD,GND) SIM 900A GSM GPRS Module feature General features •Dual-Band MHz •GPRS multi-slot class 10/8 •GPRS mobile station class B •Compliant to GSM phase 2/2+ – Class 4 (2 W @900 MHz) – Class 1 (1 W @ MHz) •SAIC (Single Antenna Interference Cancellation) support •Dimensions: mm •Weight: 3.4g •Control via AT commands (GSM and SIMCOM enhanced AT Commands) •SIM application toolkit •Supply voltage range : V •Low power consumption: 1.0mA(sleep mode&BS -PA-MFRMS=9) •Operation temperature: -40°C to +85 °C Default Settings on the board The baud rate is set to when we ship the board. You may change it with AT+IPR = . The echo of characters is turned on by default. Downloads SIM 900 AT commands SIM900_AT_Command_Manual_V1.03.pdf USB Driver To connect GSM Modem with computer USB driver is required, please download from Silicon Labs website. GUI for windows Xplore GSM is a Windows GUI and command line software that can be used to test and evaluate the GSM USB Shield.

Product details   SIM900A Modem is built with Dual Band GSM/GPRS based SIM900A modem from SIMCOM. It works on frequencies MHz. SIM900A can search these two bands automatically. The frequency bands can also be set by AT Commands. The baud rate is configurable from 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

EVERGREEN ELECTRONICS Evergreen's  Low cost RS232 GSM GPRS TTL UART SIMCOM Modem is built with Dual Band GSM GPRS Module- SIM900A, works on frequencies  MHz. The Modem comes with onboard voltage level converter for UART communication and have onboard RS232 for easy communication with Computer. The baud rate is configurable from through AT commands. The GSM GPRS India Modem has an internal TCP/IP stack to enable you to connect with internet via GPRS. It is suitable for SMS, Voice as well as DATA transfer application

Walnut GSM/GPRS Modem USB The GSM/GPRS Modem USB uses SIM900A based Quad band MHz GSM / GPRS module. It can be connected to PC or laptop via  USB directly or to a microcontroller UART using TTL levels. The modem consists of all the external circuit required to start experimenting with the SIM900A module like the power regulation, external antenna, SIM Holder, etc. Modem is built with Quad Band GSM/GPRS based SIM900A module from SIMCOM. It works on frequencies MHz. SIM900A can search these bands automatically. The frequency bands can also be set by AT Commands. The baud rate is configurable from through AT command. The GSM/GPRS Modem is having internal TCP/IP stack to enable you to connect with internet via GPRS. Best suited for GSM based Microcontroller Projects (better than SIM300 and other GSM Modems) **** Can be Use for Bulk SMS sending using Compatible software. Features: U ses the extremely popular SIM900A GSM module. Accepts commands through On board USB serial. Also can accept commands from microcontroller UART. Provides serial TTL interface for easy and direct interface to microcontrollers. Works on 9V-18V 1 A SMPS supply. Speaker and Microphone pins onboard for voice Communication. On board SMA connector with GSM antenna. On board Power, Network, Ring and status LED’s for indication. Can do basic functions which can be done via normal phone like calling, send sms, access data through GPRS etc. Plug and play device. Can accept commands through Hyper Terminal. Ft232 R  Based USB communication- Better and Faster than other Cheap USB Drivers. Supports Windows / Vista / Server / XP / SE / MaC OS X / Mac OS 9,Linux 3.x.x / 2.x.x. Small size. NOTE: The modem consumes current of nearly 1A during transmission; please make sure that your power supply can handle such currents. Modems are pretested before shipping. We recommend to use a 12V DC 2 Amps power supply & Use USB Cable to Connect GSM MODEM to PC or Laptop. Please be very gentle with the SIM card tray while inserting or removing the SIM card. Also don't tighten the screws of the antenna too much, just make sure it is connected properly without exerting too much force to tighen the antenna. This Product Includes: ·          GSM/GPRS Modem USB ·          2 dbi Rubber duck antenna ·          USB Cable ·          USB Driver (FT232R) Please Visit for Download AT Commands & USB Drivers: http://www.walnutinnovations.com/gsm-usb-modem.html Rules and Regulations: 1. All Items

SIM900A MODULE INTRODUCTION: SIM900A Modem is built with Dual Band GSM/GPRS based SIM900A modem from SIMCOM. It works on frequencies MHz. SIM900A can search these two bands automatically. The frequency bands can also be set by AT Commands. The baud rate is configurable from 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. Features: This is a complete GSM/GPRS module

Specification Compatible Arduino UNO/Seeeduino directly ; Other main board via jumpers Selectable interface UART, Software serial Quad band support MHz Communication support Standard - GSM and Enhanced - SIMCOM AT Commands Operation temperature -40°C to +85 °C Protocol support MUX protocol, embedded TCP/UDP protocol, FTP/HTTP, FOTA, MMS, embedded AT Certification of SIM900 CE, IC, FCC, ROHS, PTCRB, GCF, ICASA, REACH, AT&T Dimensions mm Consumption Power supply 5v via 5V pin, v via Vin pin

Walnut GSM/GPRS Modem USB The GSM/GPRS Modem USB uses SIM900A based Quad band MHz GSM / GPRS module. It can be connected to PC or laptop via  USB directly or to a microcontroller UART using TTL levels. The modem consists of all the external circuit required to start experimenting with the SIM900A module like the power regulation, external antenna, SIM Holder, etc. Modem is built with Quad Band GSM/GPRS based SIM900A module from SIMCOM. It works on frequencies MHz. SIM900A can search these bands automatically. The frequency bands can also be set by AT Commands. The baud rate is configurable from through AT command. The GSM/GPRS Modem is having internal TCP/IP stack to enable you to connect with internet via GPRS. Best suited for GSM based Microcontroller Projects (better than SIM300 and other GSM Modems) **** Can be Use for Bulk SMS sending using Compatible software. Features: U ses the extremely popular SIM900A GSM module. Accepts commands through On board USB serial. Also can accept commands from microcontroller UART. Provides serial TTL interface for easy and direct interface to microcontrollers. Works on 9V-18V 1 A SMPS supply. Speaker and Microphone pins onboard for voice Communication. On board SMA connector with GSM antenna. On board Power, Network, Ring and status LED’s for indication. Can do basic functions which can be done via normal phone like calling, send sms, access data through GPRS etc. Plug and play device. Can accept commands through Hyper Terminal. Ft232 R  Based USB communication- Better and Faster than other Cheap USB Drivers. Supports Windows / Vista / Server / XP / SE / MaC OS X / Mac OS 9,Linux 3.x.x / 2.x.x. Small size. NOTE: The modem consumes current of nearly 1A during transmission; please make sure that your power supply can handle such currents. Modems are pretested before shipping. We recommend to use a 12V DC 2 Amps power supply & Use USB Cable to Connect GSM MODEM to PC or Laptop. Please be very gentle with the SIM card tray while inserting or removing the SIM card. Also don't tighten the screws of the antenna too much, just make sure it is connected properly without exerting too much force to tighen the antenna. This Product Includes: ·          GSM/GPRS Modem USB ·          2 dbi Rubber duck antenna ·          USB Cable ·          USB Driver CD (FT232R) Please Visit for Download AT Commands & USB Drivers: http://www.walnutinnovations.com/gsm-usb-modem.html Rules and Regulations: 1. All Items