Week 8

Variable speed fan .. Using mobile app to control fan speed 

To make this fan mechanism I used 2 softwares:

• Arduino IDE for coding

• Arduino Bluetooth Control for connection with bluetooth

And some of electronics like:

• Arduino UNO board

• Bluetooth module 

• DC motor - OUTPUT

• RGB LED - OUTPUT 

• Resistors

• Jumbers

• Breadboard

Firstly I connected the circuit like the following diagram then used pins 1&2 which are TX & RX to connect them with the bluetooth module:

• RX UNO  with TX Bluetooth

• RX Bluetooth with TX UNO

Then uploaded the code to the board .. After that I open the app on my phone choosed to connect with Bluetooth device and choose my module then went to buttons to send the numbers in the code 

• Number 1 -- LED Color is Blue - Motor Speed 100

• Number 2 -- LED Color is Green - Motor Speed 170

• Number 3 -- LED Color is Red - Motor Speed 255

IDE Code

The code starts with setup my outputs pins and the speed of serial communication to be 9600 then as a loop give the user 3 options If you pressed number from 1 to 3 in the app and then it will send the number to the bluetooth module "the serial"  & the output will be one of the following:

1. LED Color is Blue - Motor Speed 100

2. LED Color is Green - Motor Speed 170

3. LED Color is Red - Motor Speed 255

And all of that happens each 2 seconds.

Connection Stps with Bluetooth Module 

Always had a challenge with uploading the code on the board while the bluetooth module connected ti RX and TX so, I should remove one of them to let the program complete the uploading prossess and dur to that always required to reconnect the blutooth module to the phone after each edit and upload 

Assignment Design Files