Touch Screen based Automation using Networking of Microcontroller

The project is designed to demonstrate how multiple microcontrollers can be connected in a network to achieve the desired output. This technology is widely used in modern automobiles. More and more microcontrollers are embedded in different kinds of products from industrial environment to domestic area. The importance of having multiple microcontrollers against a single one is if one of the microcontrollers goes bad only the function related to that particular microcontroller will be affected. The project demonstrates a command based monitoring tool using the MAX232 protocol. A network of three microcontrollers is used in this project. The first one is connected to touch screen for input action while the second one is connected to an IR sensor and the third one to drive a relay for controlling any load (LAMP). Input takes a password on the first MC to display it on the LCD while the third one executes the output only if the password is right. Wrong password if entered will generate a buzzer sound. Though this task can be performed by a single microcontroller, the project uses multiple microcontrollers to explain the concept of networking. It is practically impossible by a single microcontroller to handle input action, display and output which are located way apart. For example, a display unit requiring 15 connections from the microcontroller needs to be managed using a multi core cable, similarly for a keypad using 7 connections. Thus, for large number of inputs and displays it would require multi core data cable to be connected to the MC running over kilometers, whereas this project uses a pair of wire only thereby reducing the complications in wiring and cost as well. Further this project being based on serial communication can be enhanced by using wireless communication among the controllers by avoiding costly cabling. We can set the security system in this project. That is total depends on IR sensor. If security break than siren will be on. We can use the motor with blade to mix the material so that is the concept of mixing plant. We can set the Blower to control the heating parameter.