The Bluetooth wireless technology is set to revolutionize the way people perceive digital devices in our homes and office environment. Now they are no longer just the individual devices; instead, with the embedded Bluetooth technology, they form a network in which appliances can communicate with each other.
This wireless technology is especially useful in home environment, where there exists hardly any infrastructure to interconnect intelligent appliances. It could be suitably used for home automation in a cost-effective manner. Operating over unlicensed, universally available frequency of 2.4 GHz, it can link digital devices within a bluetooth range. Building upon this theme; we propose a home automation system based on Bluetooth technology.
Bluetooth Module is interfaced with the microcontroller 89S52. The microcontroller has full duplex UART which is used for communication with Bluetooth Module. The Relays on/off operation to control electrical Appliances circuitry has been developed to demonstrate the feasibility and effectiveness of the application. We can control electrical loads wirelessly using android phone.
The Android Software in Mobile Phone sends proper commands to Bluetooth module which is then decoded by microcontroller to perform required switching operation of electrical load. The 16*2 LCD Display is used to show the status of the circuit. The ac electrical load is interfaced through relay. The relays is connected to ULN2003 driver.
We are using android based app for scheduling of electrical load using timer settings.
Software Tools:
- ARDUINO IDE
- EMBDDED CPP CODE
- PROTEUS SIMULATOR
Hardware :
- ATMEGA328 Microcontroller
- Bluetooth Module.
- ULN2003 Current Driver
- Relay
- AC Electrical Load
- Regulated Power Supply