Sunday, September 17, 2017

Arduino Project: Home Automation System Using a Simple Android App and Bluetooth

Robometricschool. - This is one of the application of Arduino for building home automation system for you. It is seem be cool to build home automation system using Arduino and Android App and bluetooth system yourself. 

In here beside we will give you the description, circuit schematic, and some modele or component needed, we also will give you to you to read more about the complete project from other source.

Circuit Schematic

Figure 1. Circuit schematic of Home Automation System Using a Simple Android App and Bluetooth (Source: Electronicsforu)

Component Parts

  • Arduino Uno Module
  • Bluetooth Module
  • Relay Module

Description

Accordingly Electronicsforu site that published this circuit describe that the home automation circuit is built around an Arduino Uno board, Bluetooth module HC-05 and a 3-channel relay board. The number of channels depends on the number of appliances you wish to control. Arduino Uno is powered with a 12V DC adaptor/power source. The relay module and Bluetooth module can be, in turn, powered using a board power supply of Arduino Uno.

Image Courtesy of Electronicsforu

Bluetooth module used in this project is HC-05, which supports master and slave mode serial communication (9600-115200 bps) SPP and UART interface. Using these features it can communicate with other Bluetooth-enabled devices like mobile phones, tablets and laptops. The module runs on 3.3V to 5V power supply.

A relay allows you to turn on or turn off a circuit using voltage and/or current much higher than what Arduino could handle. Relay provides complete isolation between the low-voltage circuit on Arduino side and the high-voltage side controlling the load. It gets activated using 5V from Arduino, which, in turn, controls electrical appliances like fans, lights and air-conditioners. 

In this home automation project circuit, Pins 10 and 11 of Arduino are connected to pins TXD and RXD of the Bluetooth module, respectively.


Pins Gnd and Vcc of the Bluetooth module are connected to Gnd and +3.3V of Arduino board respectively. Pins 2, 3 and 4 are connected to the three relays (RL1, RL2 and RL3) of the relay board. Pins Vin and Gnd of the relay board are connected to pins Vin and Gnd of Arduino board, respectively. Read more here




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