SIM800A Quad Band GSM/GPRS Module with RS232 Interface

(4 customer reviews)

In stock

SKU: 34205
  1. Quad-band 850/900/1800/1900MHz.
  2. GPRS class 2/10.
  3. Input Voltage : 9V-12V DC.
  4. Control via AT commands (3GPP TS 27.007, 27.005 and SIMCOM enhanced AT command set).
  5. Configurable baud rate.
  6. Built-in SIM Card holder.
  7. Built-in Network Status LED.


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Category: GPRS and GSM Modules
Tags: RS232, RS232 to TTL, SIM800A, GSM, GPRS, Quad Band

The SIM800A Quad Band GSM/GPRS Module with RS232 Interface is a complete Quad-band GSM/GPRS solution in an LGA(Land grid array) type which can be embedded in the customer applications. SIM800A support Quad-band 850/900/1800/1900 MHz, it can transmit Voice, SMS, and data information with low power consumption.

With tiny size of 100 x 53 x 15 mm, it can fit into slim and compact demands of custom design. Featuring and Embedded AT, it allows total cost savings and fast time-to-market for customer applications.

The SIM800A modem has a SIM800A GSM chip and RS232 interface while enables easy connection with the computer or laptop using the USB to the Serial connector or to the microcontroller using the RS232 to TTL converter. Once you connect the SIM800A modem using the USB to RS232 connector, you need to find the correct COM port from the Device Manager of the USB to Serial Adapter.

Then you can open Putty or any other terminal software and open a connection to that COM port at 9600 baud rate, which is the default baud rate of this modem. Once a serial connection is open through the computer or your microcontroller you can start sending the AT commands. When you send AT commands for example “ATr” you should receive back a reply from the SIM800A modem saying “OK” or other response depending on the command sent.

Application : 
  1. Remote Data Monitor and Control.
  2. Water, gas, and oil flow metering.
  3. AMR (automatic meter reading).
  4. Power station monitoring and control.
  5. Remote POS (point of sale) terminals.
  6. Traffic signals monitor and control.
  7. Fleet management.
  8. Power distribution network supervision.
  9. Central heating system supervision.
  10. The weather station data transmission.
  11. Hydro-logic data acquisition.
  12. Vending machine.
  13. Traffic info guidance.
  14. Parking meter and Taxi Monitor.
  15. Telecom equipment supervision (Mobile base station, microwave or optical relay station).

Features :

  1. Quad-band 850/900/1800/1900MHz.
  2. GPRS class 2/10.
  3. Control via AT commands (3GPP TS 27.007, 27.005 and SIMCOM enhanced AT command set).
  4. High-Quality Product (Not hobby grade).
  5. 5V interface for direct communication with MCU kit.
  6. Configurable baud rate.
  7. Built-in SIM Cardholder.
  8. Built-in Network Status LED.
  9. Inbuilt Powerful TCP/IP protocol stack for internet data transfer over GPRS.
  10. Low power.

Package Includes :

1 x SIM800A Quad Band GSM/GPRS Module with RS232 Interface.

SKU: 34205 Category: Tags: , , , , ,
Width (mm):


Height (mm):


Weight (g):


Shipping Weight 0.059 kg
Shipping Dimensions 11 × 6.5 × 2.5 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Based on 4 reviews

4.8 overall

Add a review

  1. amnlabz (verified owner)

    Good product


  2. spandey1982 (verified owner)

    Very solid module. No fluctuation or loss of data. Little bulky compared to 900a or 800l.

    Tried with 12 volt. Works like charm


  3. divyanshu1sharma (verified owner)

    very good made in india kit,superb…..


  4. Swapnil dhobale (verified owner)

    Works well with Arduino built in buzzer for call or sms notification

    Swapnil dhobale

AT Commands

Schematic and Datasheet

Questions and answers of the customers

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    Q How to stop the inbuilt buzzer?. Need help.
    Asked by sashi.kant31 on September 8, 2020 10:21 pm
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    Q What is logic level for Rx and Tx pins? answer now
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Country Of Origin: China

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