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Saturday, February 27, 2016

How to Interface GSM module SIM900 to AT89S51

ElcoHow. - There are many application that can develop using microcontroller MCS51 specially using AT89S51. One application MCS51 is to interface with GSM module SIM900 like in Figure 1 below.

In here we will give you one project on how to How to Interface GSM module SIM900 to AT89S51 that like published by Circuitstoday site. Beside circuit schematic that appear here, you will redirect to original source to read more the listing program to produce the microcontroller work.

You also can read: How to Build Transformerless Power Supply 30V 1A using Thyrirstor

Electronic Circuit
Component List
  1. GSM module SIM900
  2. AT89S51
  3. X-Tal 12 MHz
  4. Capacitors
  5. Resistors
  6. LCD
Description

Electronic circuit like in Figure 1 above is Interfacing GSM module SIM900 to AT89S51 circuit. According Circuitstoday site that published this circuit describe that  this circuit diagram for interfacing GSM module to 8051 microcontroller is shown above. Here the GSM module and the microcontroller communicates in between using serial communication. Rx pin of the 8051 is connected to Tx pin of the GSM module and Tx pin of the 8051 is connected to the Rx pin of the GSM module. The LCD module is involved in this project to give an indication message when the SMS is sent. Switch S1, capacitor C4 and resistor R2  are associated with reset circuit of the microcontroller. Capacitor C1, C2 and crystal X1 are associated with clock circuit. C3 is just a noise by-pass capacitor. Resistor R2 is used to set the contrast of the LCD display. Resistor R3 limits the current through the back light LED..
Skill

To  Interface GSM module SIM900 to AT89S51, you need some skill as follow:
  1. Basic soldering.
  2. Read a basic schematic.
  3. Assembling electronic component
  4. Design PCB layout
  5. Testing voltage and current
  6. Know GSM module SIM900 component
  7. Microcontroller AT89S51 basic
  8. Microcontroller AT89S51 programming
Tools and Material

In this project, you must prepare some tools and material that used as the supporting to  Interface GSM module SIM900 to AT89S51 as follow:
  1. Tools: soldering iron, cutter, multitester, and Project Board.
  2. Material: Tin, PCB
  3. Software like Proteus 8, PCB Wizard
  4. ISP Downloader
Software

When you want to realize this Interface GSM module SIM900 to AT89S51 circuit into real application, you can build it as like design PCB layout using good software as like: PCB Wizard and to simulate and download this program to microcontroller you can use Proteus, AVR Studio 4, MIDE 51. 
How to do?

For more information about this project step-by-step you can follow this project of to Interface GSM module SIM900 to AT89S51 you can read below.
  1. Prepare electronic component listed, material and tools needed.
  2. Firstly you can simulate this circuit schematic or program listing using Proteus 8.4 for Windows.
  3. After success, please download your listing program after write in MIDE 51 software to AT89S51 IC using ISP downloader using software AVR Studio 4 for Windows.
  4. Firstly you can try this circuit using project board tool.
  5. After you surely with this circuit work properly, now you can begin with design PCB using PCB Wizard.
  6. After designed, now you can make the PCB layout to put these components. You can make PCB by your self or order it according your PCB layout design.
  7. Put all component to the PCB layout and soldering all component.
  8. Now you can test, input and output voltage and current from this circuit. 
  9. Then you can check and test the result of this project
Listing Program

Please click here to get the listing program to  Interface GSM module SIM900 to AT89S51 from original source.


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