![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2013\/09\/thumbdcmotors.jpg?resize=700%2C523&quality=100&strip=all&ssl=1\")
<\/div>\nIn a\u00a0previous tutorial (click here to see that project<\/a>),\u00a0I was controlling 1 DC motor using an app called “BlueTerm”. That app did the job, but\u00a0it’s not ideal to send constantly different commands in an easy manner.<\/p>\n The app that you’re going\u00a0to build is perfect to control any Arduino pin or to integrate with your own robot car<\/a>. You can edit this app for your specific needs.<\/p>\n To establish the bluetooth communication between your smartphone and your Arduino, you need a bluetooth module. This project uses\u00a0the HC-05 bluetooth module\u00a0(as\u00a0shown\u00a0in the figure below).<\/p>\n This bluetooth module works with serial data. This means that the Arduino sends information and the bluetooth module receives it via serial (and vice-versa).<\/p>\n By default\u00a0the\u00a0HC-05 bluetooth module operates at a baud rate of 9600.<\/p>\n The Android App will be created\u00a0using a free web application\u00a0called\u00a0MIT App Inventor<\/a>. MIT App Inventor is a great place to get started\u00a0with Android development, because it allows you to build simple apps with drag-n-drop.<\/p>\n You need a Google account to sign up for MIT App Inventor and here\u2019s the login page: http:\/\/ai2.appinventor.mit.edu<\/a>.<\/p>\n Click here to download the .aia file<\/a>, then watch the video below:<\/strong><\/p>\nBluetooth module HC-05<\/h2>\n
![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2013\/09\/Bluetooth-Module.jpg?resize=200%2C181&quality=100&strip=all&ssl=1\")
<\/p>\nCreating your Android app<\/h2>\n