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  • Part No :
  • GSM-1934
  • Availability:
  • In Stock
  • Shipping :
  • Same Day
  • Weight:
  • 0.2Kg
  • Made By:
  • rhydoLABZ
  • Mfr.Part.No:
  • GSM-1934
  • Quality Rank:
  • 100/100
Rs 1999
(Tax Excl.)
Quantity :
Description: The GSM/GPRS Modem-RS232, from rhydoLABZ, is built with Quad Band GSM/GPRS engine- SIM900, works on frequencies  850/ 900/ 1800/ 1900 MHz. The Modem is coming with RS232 interface,which allows you connect PC as well as microcontroller with RS232 Chip(MAX232). The baud rate is configurable from 9600-115200 through AT command. The 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 in M2M interface. SIM900 is a quad band modem, being able to operate in 850,900,1800,1900 MHz bands it is apt for world wide compliance.

The Modem is manufactured with Automatic Pick and place machine with high quality standard.The onboard Low dropout 3A Power supply allows you to connect wide range unregulated power supply  . Using this modem,you can make audio calls, SMS, Read SMS, attend the incoming calls and internet etc through simple AT commands.

Note: rhydoLABZ wiki has extensive contents
showing you how to get started, how to configure the GSM/GPRS Modem-RS232 Modem and other details such as pinout, schematic etc. Kindly visit our wiki page for any reference.

Modem Features:
  • High Quality Product (Not hobby grade)
  • Quad-Band GSM/GPRS  850/ 900/ 1800/ 1900 MHz 
  • RS232 interface for direct communication with computer or MCU kit
  • Configurable baud rate
  • SMA connector with GSM Antenna.
  • SIM Card holder.
  • Built in Network Status LED 
  • Inbuilt Powerful TCP/IP protocol stack for internet data transfer over GPRS.
  • Audio interface Connector
  • Normal operation temperature: -20 °C to +55 °C
  • Input Voltage: 5V-12V DC
SIM900 General Specification:
  • Quad-Band 850/ 900/ 1800/ 1900 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 @ 1800MHz)
  • Dimensions: 24x24x3mm
  • Weight: 3.4g
  • Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands)
  • SIM application toolkit
  • Supply voltage range : 3.4V to 4.5V
  • Low power consumption: 1.0mA(sleep mode)
  • Operation temperature: -40°C to +85 °C
Modem Specifications:
  • Fax: Group 3, Class 1
  • Data
    • GPRS class 10: max. 85.6 kbps (downlink)
    • PBCCH support
    • Coding schemes CS 1, 2, 3, 4
    • CSD up to 14.4 kbps
    • USSD
    • Non transparent mode
    • PPP-stack
  • SMS
    • Point to point MO and MT
    • SMS cell broadcast
    • Text and PDU mode
  • Voice
    • Tricodec
      • Half rate (HR)
      • Full rate (FR)
      • Enhanced Full rate (EFR)
    • Hands-free operation (Echo suppression)
    • AMR
      • Half rate (HR)
      • Full rate (FR)
  • Firmware Support
    • FOTA
    • MMS
    • Java (cooperate with Iasolution)
    • Embedded AT
  • Other features
    • 0710 MUX protocol
    • Embedded TCP/UDP protocol
    • FTP/HTTP
  • Interfaces
    • Interface to external SIM 3V/ 1.8V
    • Analog audio interface
    • RTC backup
    • SPI interface (option)
    • Serial interface
    • Antenna pad
    • I2C
    • GPIO
    • PWM
    • ADC
  • Compatibility: AT cellular command interface
  • Certificates
    • CE
    • FCC
    • ROHS
    • PTCRB
    • GCF
    • IC
    • ICASA
    • REACH
Package Includes:
  • 1x Fully Assembled and Tested GSM Modem with antenna
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By Sachin Attri from N/A on April 14, 2015
Do i get Antenna along with it asnd does it support 3G band?
Was this review helpful to you?   Yes   No
    • Q
    • Hi,

      I have few questions for this product,
      1. Will this product works anywhere in the world(USA)?
      2. Do I need to have any micro controllers to be attached to this device before connecting to PC(computer) to send and receive sms through computer?
      3. Do you have the documentation available to configure and make this work to send and receive sms?

      asked by Leela Krishna on September 26, 2016
    • A
    • The GSM/GPRS Modem-RS232, from rhydoLABZ, is built with Quad Band GSM/GPRS engine- SIM900, works on frequencies 850/ 900/ 1800/ 1900 MHz. So it will work anywhere in the world where the GSM frequency band is among one of these 4 frequencies.

      You need not use a microcontroller for direct communication of this device with PC. Since it have a DB9 connector(RS232 out), device can directly communicate with PC through its serial port with the help of DB9 cable. If you use USB port you should need a level converter.

      Please go through the below link which is our wikipage, have a detail description about the module.

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