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In this webinar episode, we focused on connecting Arduino with Servo Motors, GSM and wirelessly by covering the following topics:
1. Connecting Bluetooth HC-05 with MATLAB
2. Control LED from Android using Bluetooth
3. Control Servo Motor from Android using Bluetooth
4. Connect GSM Module with Arduino and MATLAB. Test the Connection!
5. More projects with wireless technologies and their application.
Connection Diagram (LED & Servo Motor):
Connection Diagram (GSM Module):
MATLAB & Arduino Codes:
// Filename: LEDSerial.ino
#include <SoftwareSerial.h>
//Initialize the Variables and ports
int TxD;
int RxD;
int data;
SoftwareSerial bluetooth(10, 9); // Connection: TX at 10; RX at 9
void setup() {
Serial.begin(9600);
bluetooth.begin(9600);
Serial.println("The Bluetooth Channel is open.."); //Display when the bluetooth is ready
}
void loop()
{
if(bluetooth.available())//Will check if bluetooth is available
{
data = bluetooth.read(); // Read data from serial monitor of MATLAB
Serial.write(bluetooth.read());
Serial.print("\n");
if(data == '1') //Set LED to High and Low
{
digitalWrite(11, HIGH);
Serial.println("LED On!");
}
else if(data == '0') //Set LED to High and Low
{
digitalWrite(11, LOW);
Serial.println("LED OFF!");
}
}
if(Serial.available())
{
bluetooth.write(Serial.read());
}
}
% Filename: Connection.m
%% Connect to the bluetooth with name HC-05
B=Bluetooth('HC-05',1)
%% Check the connection information
instrhwinfo('Bluetooth')
% Filename: SendCommands.m
clear all
clc
%% Connect to the bluetooth with name HC-05
B=Bluetooth('HC-05',1)
%% Open the Connection for Serial Communication
fopen(B);
%% Turn ON LED by sending High(1)
fprintf(B,'1');
%% Turn Off LED by sending Low(0)
fprintf(B,'0');
// Filename: ServoSerial.ino
#include <SoftwareSerial.h>
#include <Servo.h>
//Initialize the Variables and ports
int TxD;
int RxD;
int data;
Servo myservo;// create servo object to control a servo
int pos = 0; // variable to store the servo position
SoftwareSerial bluetooth(10, 9); // Connection: TX at 10; RX at 9
void setup() {
myservo.attach(6); // attaches the servo on pin 9 to the servo object
Serial.begin(9600);
bluetooth.begin(9600);
Serial.println("The Bluetooth Channel is open.."); //Display when the bluetooth is ready
}
void loop()
{
if(bluetooth.available())//Will check if bluetooth is available
{
data = bluetooth.read(); // Read data from serial monitor of MATLAB
Serial.write(bluetooth.read());
Serial.print("\n");
if(data == '1') //Set LED to High and Low
{
for (pos = 0; pos <= 180; pos += 1)
{ // goes from 0 degrees to 180 degrees
// in steps of 1 degree
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
for (pos = 180; pos >= 0; pos -= 1)
{ // goes from 180 degrees to 0 degrees
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
}
else if(data == '0') //Set LED to High and Low
{
int pos = 0;
myservo.write(pos);
}
}
if(Serial.available())
{
bluetooth.write(Serial.read());
}
if(Serial.available())
{
bluetooth.write(Serial.read());
}
}
// Filename: GSMSerial.ino
#include <SoftwareSerial.h>
SoftwareSerial mySerial(9, 10);
void setup()
{
mySerial.begin(9600); // Setting the baud rate of GSM Module
Serial.begin(9600); // Setting the baud rate of Serial Monitor (Arduino)
delay(100);
}
void loop()
{
if (Serial.available()>0)
switch(Serial.read())
{
case '1':
SendMessage();
break;
case '0':
RecieveMessage();
break;
}
if (mySerial.available()>0)
Serial.write(mySerial.read());
}
void SendMessage()
{
mySerial.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode
delay(1000); // Delay of 1000 milli seconds or 1 second
mySerial.println("AT+CMGS=\"+91XXXXXXXXXX\"\r"); // Replace x with mobile number
delay(1000);
mySerial.println("I am SMS from GSM Module");// The SMS text you want to send
delay(100);
mySerial.println((char)26);// ASCII code of CTRL+Z
delay(1000);
}
void RecieveMessage()
{
mySerial.println("AT+CNMI=2,2,0,0,0"); // AT Command to receive a live SMS
delay(1000);
}
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