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  • Part No :
  • GSM-1965
  • Availability:
  • Out of Stock
  • Shipping :
  • Same Day*
  • Weight:
  • 0.2Kg
  • Made By:
  • rhydoLABZ
  • Mfr.Part.No:
  • GSM-1965
  • Quality Rank:
  • 100/100
Rs 1299
(Excluding GST.)
Rs 1533
(Including GST)
1533 New Out of Stock
  • Buy & earn 130  reward points
  • GST Invoice & Input Credit Available
Description: The GSM/GPRS TTL UART Modem, from rhydoLABZ, is built with Dual Band GSM/GPRS engine- SIM900A, works on frequencies  900/ 1800 MHz. The Modem is coming with selectable interfacing voltage,which allows you to connect 5V & 3V3 microcontroller directly without any level conversion chips. 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.

Note: rhydoLABZ wiki has extensive contents
showing you how to get started, how to configure the GSM/GPRS TTL UART Modem and other details such as pinout, schematic etc. Kindly visit our wiki page for any reference.
Note: Please note that Sim900A is a dual-band module suitable only for Asian countries. For world wide usage please choose GSM/GPRS modems embedded with SIM900 module.

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 (5V-12V). Using this modem, you can make audio calls, send and read SMS, attend the incoming calls, get internet connectivity etc using simple AT commands.

Modem Features:

  • High Quality Product (Not hobby grade)
  • Dual-Band GSM/GPRS   900/ 1800 MHz
  • 3V3 & 5V  interface for direct communication with 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
SIM900A General Specification:
  • Dual-Band 900/ 1800 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 : 3.2 ... 4.8V
  • 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.
  • 1x 2 Pin Female RMC connector (2mm)
  • 1x 4 Pin Female RMC connector (2mm)
  • 1x 8 Pin Female RMC connector (2mm)
Sort by: Recently  /  Helpful Write review

By Arun Singh from N/A on January 05, 2016
2 of 6 people found this review helpful
Was this review helpful to you?   Yes   No

By Ajay S from N/A on December 30, 2015
My first purchase from rhydoLABZ. module arrived. good service. nice tutorial. solid product.
2 of 4 people found this review helpful
Was this review helpful to you?   Yes   No
    • Q
    • does this module support ftp commands??

      asked by Vikas Naik on April 20, 2016
    • A
    • Yes, the SIM900 Series supports FTP Application.

    • Q
    • Hello.

      Am looking for complete mechanical dimensional data (mounting hole position and diameter, connectors (positions, pitch and connector part number).
      We are planning to use mount this module on carrier board.


      asked by Satyan on May 21, 2016
    • A
    • We will forward the dimensional drawing to your mail ID

    • Q
    • Could this GSM module be interfaced with arduino?

      asked by Aditya Gundawar on May 26, 2016
    • A
    • Yes, the modem could be interfaced with arduino board.
      Just make sure that the power supply used is capable of powering arduino board as well as the GSM modem.

      Please refer the product wiki for more details.

    • Q
    • Does this module support at+http commands???

      asked by BIJAY RAI on February 12, 2017
    • A
    • GSM/GPRS TTL UART MODEM-SIM900A can support AT=HTTP commands.

    • Q
    • Is this device support 4G SIM cards?

      asked by sreeresmi on February 14, 2017
    • A
    • GSM/GPRS TTL UART MODEM-SIM900A can support 4G SIM.

    • Q
    • Hi ,

      I want to buy GSM/GPRS TTL UART MODEM-SIM900A. It is mentioned in the link that package consist of one board with antenna, 1x2, 1x4 and 1x8 RMC connector. Does this connectors are crimped to some wires? If crimped, what is the length of cable?

      asked by Nikhil Ingale on April 09, 2017
    • A
    • Hi Nikhil,

      We do not crimp the RMC connector. RMC connector wire has a length of 30 cm.

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