post details Interfacing SIM 300 GSM Module 89C51, 89C51 Microcontroller | Source C Code 89S51, 89S52 Microcontroller Download
SIM300 GSM GPRS Module AT89C51, AT89C52 ATMEL

M300 GSM GPRS Module
Interfacing SIM300 GSM GPRS Module with 8951 microcontroller is very easy.  It is a very compact Having industry-standard serial communication interface, the SIM300 modules offers GSM and GPRS 900/1800/1900MHz frequency working for carrying out voice on device, SMS, data and other operation. You can make call with SIM300 Sim Module interfacing 89C51 Microcontroller and develop applications. This SIM300 Module is very compact in size and easy to solder on the board you can interface SIM300 with 89C52 Microcontroller module using simple circuit and get the geo location. It  comes with the inbuilt SIM card holder while interfacing with 89S2 MCU, you have to insert SIM card inside the holder and then try to send AT command with 89S51 Microcontroller.  An External antenna is used to clear the signal state of the device. Simple AT Commands and 8051 Microcontroller can be used to develop  powerful applications.

Serial Tx Transmit and Rx Recieve lines
How to connect SIM300 Module With 8051 Microcontroller is widely asked question and here is the answer to this. All communication is executed between the SIM300 Rx and Tx lines of 89C51 Microcontrollers. Data runs on baudrate and interchanged between devices. Rx pins of SIm300 should be connected with the Tx pin of 89C52 Microcontroller and Tx pin of Sim300 should be connected with the Rx pin of 89C52 Microcontrollers. This is the common circuit for how to connect 8051 based microcontroller with SIM300 GSM Modem.

sim300-source-code-example-download-AT89C51-AT8952  projects for elctronics students be btech mca sim300
Technical Specification AndFeatures SIM 300 GSM Module

  • Circuit, Keil C Code compatible With  SIM300 GSM module
  • Serial TTL interface Logic to connect with 89C51 Microcontroller
  • Make Calls using 8051 Microcontrollers
  • Pin diagram and circuit for SIM300 Modules
  • Project SIM300 Module With Circuit, Diagram, C Code
  • AT commands With 8051 Microcontroller
  • SIM300 with adjustable  baudrate from 1200 to 115200 bps