Tag Archives: gsm

SMS Based Wireless Home Appliance Control System using PIC MCU

This article on DigitalWizard describes how you can easily make a system that can control your home appliances like lights, fans etc from SMS commands. The project is based on PIC18F4520 MCU which is a 40 pin high performance microcontroller from Microchip Inc. It has a 16×2 LCD module as the main output unit to show various status messages to the user, thus making it extremely user friendly. GSM connectivity is achieved using a SIM300 or SIM900 modems. Please click here to read more.

GSM Based Projects Buyer’s Guide

Today the market is flooded with so called project guidance institutes who provide ready made projects to the students of engineering. Over hyped and flashy names are the characteristics of such projects. I am writing this for the guidance of both students who are planning to buy such things or the faculty members of the collages evaluating such projects. Below I am giving some simple tests that could help you judge how well the software is developed. Start up the system with GSM Module disconnected from the MCUs Rx and Tx line and check if the system is able to detect this fault. Start up the system without inserting a SIM card, and check if the system is able to tell you the exact problem. Use a SIM card which has NO balance and SMS pack and check if the system is able to tell you weather message sending failed or not. Check if the system is able to detect presence of network before sending message. Faculty members of collage should arrange a mobile blocker, turn it on and then boot the system. If the system is designed to receive the message, try sending more that 32 SMS to the system to make the SIM memory full and then check what happens. A properly designed system should delete the messages […]

Remote Temperature Monitoring using GSM – AVR Project

If you want a live demo of this, please register from the link given below. (Only in Pune) REGISTER NOW! This project can also be implemented using a PIC18F4520 microcontroller. Temperature monitoring have wide application in daily life. In modern day keeping an eye on temperature of places such as server rooms, hospital rooms, warehouses and green houses can help solve many problems. But with the use of normal temperature sensors, someone needs to go to the place in order to view the temperature. But with the development of GSM network, one can easily connect the sensor with GSM network, so that you don’t need to be present near the sensor in order to view the temperature. You can just pick up your cell phone and send a request to your sensor by a text message and in no time you will receive the temperature of the remote place ! The advantage is the you don’t need any kind of "special" device at the receiver end. You can use any cell phone to view the remote temperature. This reduces cost as you already have a cell phone. Other benefit is that the range is not limited. You can be at any place in the world (with mobile coverage of course!), to request temperature data from your room. Fig. SMS Based […]

SMS Based Voting System – AVR GSM Project

If you want a live demo of this, please register from the link given below. (Only in Pune) REGISTER NOW! This project can also be implemented using a PIC18F4520 microcontroller. Hi friends ! Here I am showing a microcontroller based project called the "GSM Based Voting System". Using this system you can ask your users to vote for any of the four options. Four available options are identified by a letters ‘A’, ‘B’, ‘C’ and ‘D’. User can vote for any option by sending a text message to the mobile number. For example if you want to create a poll like this. Which is your favorite phone brand? A: Nokia B: Apple C: Samsung D: L.G. So your user can vote for any of the four brands by sending a message like this VOTE x where x is the choice he/she wish to vote for. For example if they want to vote for Nokia, then they should send a message like this : VOTE A The number of vote received for each option is shown in real time on the LCD Module. The votes are stored in the internal EEPROM of the AVR so they are not lost on power failures. That means even if you switch off the device and switch it on after few days (or few years!) […]

Sending and Receiving SMS using SIM300 GSM Module

If you want a live demo of this, please register from the link given below. (Only in Pune) REGISTER NOW! This project can also be implemented using a PIC18F4520 microcontroller. We have schematic and C library available. Hi friends in this part we will have a look at the functions related to text messages. By the end of this article you will have a clear idea of how to wait for a text message, read the message, send a new text message and deleted a received message. We have already discussed the basics of SIM300 GSM Module interface with AVR MCU in our previous tutorial you can refer that article to know about the schematic and basic communication code. GSM Module SIM300 Interface with AVR After reading the above article you will know how we have connected the SIM300, AVR ATmega32 and LCD Module to make a basic test rig. Also covered in the article is the detail about the communication method between SIM300 and AVR which is called asynchronous serial communication, done using AVR’s USART peripheral. The article shows you how to use the AVR USART library to send and receive data to/from the GSM Module. We have also discussed the command response method used for the interfacing with the module. Working code is provided that shows you how […]

GSM Module SIM300 Interface with AVR Amega32

If you want a live demo of this, please register from the link given below. (Only in Pune) REGISTER NOW! This project can also be implemented using a PIC18F4520 microcontroller. We have schematic and C library available. A GSM/GPRS Module like SIM300 can be used for any embedded application that requires a long range communication, like a robot in Chennai controlled by a person sitting in New Delhi! Or simply a water pump in a rice field turned on in the morning by a farmer sitting in his house few kilometers away! You have few communication options depending on the application, they may be as follows. Simple SMS based communication Turn on/off loads using simple SMS commands, so the controlling device is a standard handset. You can use any mobile phone to control the device. A intruder alarm/fire alarm that informs about the panic situation to the house owner on his/her mobile via SMS. Call based communication A smart intruder alarm/fire alarm that calls the police or fire station and plays a pre recorded audio message to inform about the emergency. Internet Based Communication (GPRS) User can control the end application using any PC/Tablet/Mobile with internet connection. Example: LED Message Displays installed on highways/expressways controlled from a central control room to inform users or traffic conditions ahead. A robot controlled […]

GSM-GPRS Module SIM300

GSM-GPRS Module SIM300 with sim card holder, RS232 interface, power supply, buzzer and audio interface. Nice for learning the SIM300 module. You can connect this to PC using a USB to Serial Adaptor and use terminal programs such as Realterm to send receive data. Buy SIM300 Module from our store.