Objectives:
1) To study Global System for Mobile Communication
2) To know how GSM Modem works
Method:
1) Making research in the internet
Results:
Device control through SMS using SIM300 and AT89S52
Global System for Mobile Communication (GSM) is a digital mobile telephone system. It is widely used in Eurpoe and other parts of the world. GSM digitizes and compresses data and it sends to a channel with two other streams of user data. EAch of it has each its own time slot. It operates at either the 900 MHz or 1800 MHz frequency band. For practical and everyday purposes, GSM offers users wider international roaming capabilities than other U.S network technologies and can enable a cell phone to be a "world phone". Since many GSM network operators have roaming agreements with foreign operators, users can often continue to use their mobile phones when they travel to other countries. Subscriber Identity Module(SIM) cards holding home network access configurations may be switched to those will metered local access. It is significantly reducing roaming costs while experiencing no reductions in service. It acts as your digital identity because it is tied to your cell phone service carrier's network rather than to the handset itself which allows for easy exchange from one phone to another without new cell phone service activation. GSM uses digital technology and is a second-generation wireless digital technology (2G) cell phone system. In this project, GSM Modem SIM 300 can fit almost all the space requirement in your application, such as smart phone, PDA phone and other mobile device. It comes with a standard RS232 interface which can be used easily to interface the modem to microcontrollers and computers. The operating voltage is around at 7-15V AC or DC and the board has onboard rectifier.
Conclusion:
This week I am going to explain the part of the components that will be used in this project. It is GSM modem which can send messages and receive the messages. This part will apply as to send the location of the accident's place to the ambulance and family members so that they will rescue the motorcyclist which involved in the accident. Thus, the ambulance and family members can arrive at the aciident's place in a short time and we can save half the lives that are lost due to the accidents occured.