QT Quick Arduino Bluetooth Help

Msamples795 · wrote on 26 Oct 2013, 19:45

hey guys i need alot of help i cant seem to wrap my brain around this i am very new to qt quick application but i got an interface design for my project but i am having trouble figuring out how to interface my program with bluetooth i am having trouble finding some simple examples of transmitting data from my qt quick application to my arduino.

My project:
I am building a automated mobile bar. i plan to send a string of data say for example the name of a drink from the QT Quick program over bluetooth to the arduino. the arduino will then take that string and run certain motors based on the input. i already have the arduino program running and controlling certain motors based on a string input through the serial monitor. and i already have the desired layout with my qt quick program. but i cant seem to figure out a way for my qt quick program to send a string based on a drink selected over bluetooth to my arduino.

Msamples795 · wrote on 26 Oct 2013, 19:46

My Qt Code i havent altered anything but the main.qml file
@import QtQuick 2.0
import QtQuick 2.1
import QtQuick.Controls 1.0
import QtQuick.Layouts 1.0

Rectangle {
id: root
width: 800
height: 666
color: "#2b3049"
border.width: 9
border.color: "#ffffff"
opacity: 1

Button {
    id: button1
    x: 421
    y: 589
    width: 356
    height: 27
    text: "Dispense"
}

Rectangle {
    id: rectangle1
    x: 20
    y: 19
    width: 383
    height: 597
    color: "#ffffff"
    border.width: 7
    border.color: "#000000"
    anchors.bottomMargin: 32
    anchors.bottom: parent.bottom

    TableView {
        id: drinkTable
        x: 7
        y: 6
        width: 368
        height: 583
        anchors.bottomMargin: 8
        anchors.leftMargin: 7
        anchors.topMargin: 6
        anchors.rightMargin: 8
        anchors.fill: rectangle1
        TableViewColumn{ role: "name" }
        model: drinkList

         }

    ListModel
    {
        id: drinkList

        ListElement{
            name: "Long Island"
            ingredients :"1/2 oz triple sec \n1/2 oz light rum \n1/2 oz gin \n1/2 oz vodka \n1/2 oz tequila \n1 oz sour mix \nCola "
            picture: "http://0.tqn.com/d/cocktails/1/I/I/-/-/-/113253549628.jpg"
            serial: "LONGIS"
        }
        ListElement{
            name: "White Russian"
            ingredients : "1 1/2 oz vodka \n3/4 oz Kahlua coffee liqueur \n3/4 oz cream"
            picture: "http://0.tqn.com/d/cocktails/1/I/e/N/-/-/svedka-ice-kaffe.jpeg"
            serial: "WHITERU"
        }
        ListElement{
            name: "Taquila Sunrise"
            ingredients : "4 oz orange juice \n2 oz tequila \n1/2 oz grenadine \nOrange slice for garnish \nMaraschino cherry for garnish"
            picture: "http://0.tqn.com/d/cocktails/1/I/3/K/-/-/tequila-sunrise.jpg"
            serial: "TEQUILASU"
        }

    }

}

Rectangle {
    id: rectangle2
    x: 421
    y: 19
    width: 356
    height: 547
    color: "#ffffff"
    border.width: 7
    border.color: "#000000"
    anchors.bottomMargin: 82
    anchors.bottom: parent.bottom

    ListView {
        x: 94
        y: 23
        width: 169
        height: 183
        anchors.leftMargin: 57
        anchors.topMargin: 7
        anchors.rightMargin: 57
        anchors.bottomMargin: 133

        Text { text: drinkList.get(drinkTable.currentRow).ingredients }
        }

        Image {
            id: image1
            x: 66
            y: 249
            width: 225
            height: 249
            fillMode: Image.PreserveAspectFit
            source: drinkList.get(drinkTable.currentRow).picture
        }
}

StatusBar {
    id: status_bar1
    x: 0
    y: 645
    width: 286
    height: 21
}

}
@

i want to Take the serial part of the list element and transmit it to arduino

Msamples795 · wrote on 26 Oct 2013, 19:48

Here is my arduino code

@#include <Arduino.h>

//pin assignment
//Enable Pins
const int EnablePinMotor12 = 22; //enable pin l293d pin 1
const int EnablePinMotor34 = 24; //enable pin l293d pin 9
const int EnablePinMotor56 = 26; //enable pin l293d pin 1 chip 2

//PWM Pins
const int PWM1 = 2; //PWM Input motor 1 pin 2
const int PWM2 = 3; //PWM Input motor 2 pin 7
const int PWM3 = 4; //PWM Input motor 3 pin 10
const int PWM4 = 5; //PWM Input motor 4 pin 15
const int PWM5 = 6; //PWM Input motor 5 pin 2 chip 2
const int PWM6 = 7; //PWM Input motor 6 pin 7 chip 2

//Buttron pins
const int button1Pin = 23; // the number of the pushbutton pin
const int button2Pin = 25; // the number of the pushbutton pin
const int button3Pin = 27; // the number of the pushbutton pin
const int button4Pin = 29; // the number of the pushbutton pin
const int button5Pin = 31; // the number of the pushbutton pin
const int button6Pin = 33; // the number of the pushbutton pin

// LED pins
const int Ledpin1 = 13; //Led PIn

//Status Variable
int button1State = 0; // variable for reading the pushbutton status
int button2State = 0; // variable for reading the pushbutton status
int button3State = 0; // variable for reading the pushbutton status
int button4State = 0; // variable for reading the pushbutton status
int button5State = 0; // variable for reading the pushbutton status
int button6State = 0; // variable for reading the pushbutton status

// Ingredient Variables
int ingredient1 = 0;
int ingredient2 = 0;
int ingredient3 = 0;
int ingredient4 = 0;
int ingredient5 = 0;
int ingredient6 = 0;

String inputString = ""; // a string to hold incoming data
boolean stringComplete = false; // whether the string is complete
String savedDrink = "";

void error(uint8_t flag, uint8_t values){
Serial.print("ERROR: ");
Serial.print(flag);
}
void setup(){

//Pin Mode assignment

pinMode(button1Pin, INPUT);
pinMode(button2Pin, INPUT);
pinMode(button3Pin, INPUT);
pinMode(button4Pin, INPUT);
pinMode(button5Pin, INPUT);
pinMode(button6Pin, INPUT);

pinMode(EnablePinMotor12, OUTPUT);
pinMode(EnablePinMotor34, OUTPUT);
pinMode(EnablePinMotor56, OUTPUT);

pinMode(PWM1, OUTPUT);
pinMode(PWM2, OUTPUT);
pinMode(PWM3, OUTPUT);
pinMode(PWM4, OUTPUT);
pinMode(PWM5, OUTPUT);
pinMode(PWM6, OUTPUT);

pinMode(Ledpin1, OUTPUT);

delay(1000);

Serial.begin(9600);
Serial.println("DRINKING COMMENCE");
inputString.reserve(200);
savedDrink.reserve(200);
}
void serialEvent() {
while (Serial.available()) {
// get the new byte:
char inChar = (char)Serial.read();
// add it to the inputString:
inputString += inChar;
// if the incoming character is a newline, set a flag
// so the main loop can do something about it:
if (inChar == '\n') {
stringComplete = true;
}
}
}
void buttonState(){

button1State = digitalRead(button1Pin);
button2State = digitalRead(button2Pin);
button3State = digitalRead(button3Pin);
button4State = digitalRead(button4Pin);
button5State = digitalRead(button5Pin);
button6State = digitalRead(button6Pin);

}
@

Msamples795 · wrote on 26 Oct 2013, 19:48

@
void motorControl(){

if (inputString == "FLUSH\n"){

          Serial.println ("STARTING FULL SYSTEM FLUSH");

          Serial.println ("ENABLING MOTORS");
          digitalWrite(EnablePinMotor12, HIGH);
          digitalWrite(EnablePinMotor34, HIGH);
          digitalWrite(EnablePinMotor56, HIGH);

          Serial.println ("ACTIVATING");
          analogWrite(PWM1, 175);
          analogWrite(PWM2, 175);
          analogWrite(PWM3, 175);
          analogWrite(PWM4, 175);
          analogWrite(PWM5, 175);
          analogWrite(PWM6, 175);

          Serial.println ("DISPENSING");
          delay(2000);

          Serial.println ("DEACTIVATING");
          analogWrite(PWM1, 0);
          analogWrite(PWM2, 0);
          analogWrite(PWM3, 0);
          analogWrite(PWM4, 0);
          analogWrite(PWM5, 0);
          analogWrite(PWM6, 0);

          Serial.println ("DISABLING MOTORS");
          digitalWrite(EnablePinMotor12, LOW);
          digitalWrite(EnablePinMotor34, LOW);
          digitalWrite(EnablePinMotor56, LOW);

}
if (inputString == "M1\n"){

          Serial.println ("STARTING MOTOR 1");

          Serial.println ("ENABLING MOTOR 1");
          digitalWrite(EnablePinMotor12, HIGH);

          Serial.println ("ACTIVATING MOTOR 1");
          analogWrite(PWM1, 175);

          Serial.println ("DISPENSING");
          delay(2000);
          Serial.println ("DEACTIVATING");
          analogWrite(PWM1, 0);

          Serial.println ("DISABLING MOTOR 1");
          digitalWrite(EnablePinMotor12, LOW);

}
if (inputString == "M2\n"){

          Serial.println ("STARTING MOTOR 2");

          Serial.println ("ENABLING MOTOR 2");
          digitalWrite(EnablePinMotor12, HIGH);

          Serial.println ("ACTIVATING MOTOR 2");
          analogWrite(PWM2, 175);

          Serial.println ("DISPENSING");
          delay(2000);

          Serial.println ("DEACTIVATING");
          analogWrite(PWM2, 0);

          Serial.println ("DISABLING MOTOR 2");
          digitalWrite(EnablePinMotor12, LOW);

}
if (inputString == "M3\n"){

          Serial.println ("STARTING MOTOR 3");

          Serial.println ("ENABLING MOTOR 3");
          digitalWrite(EnablePinMotor34, HIGH);

          Serial.println ("ACTIVATING MOTOR 3");
          analogWrite(PWM3, 175);

          Serial.println ("DISPENSING");
          delay(2000);

          Serial.println ("DEACTIVATING");
          analogWrite(PWM3, 0);

          Serial.println ("DISABLING MOTOR 3");
          digitalWrite(EnablePinMotor34, LOW);

}
if (inputString == "M4\n"){

          Serial.println ("STARTING MOTOR 4");

          Serial.println ("ENABLING MOTOR 4");
          digitalWrite(EnablePinMotor34, HIGH);

          Serial.println ("ACTIVATING MOTOR 4");
          analogWrite(PWM4, 175);

          Serial.println ("DISPENSING");
          delay(2000);

          Serial.println ("DEACTIVATING");
          analogWrite(PWM4, 0);

          Serial.println ("DISABLING MOTOR 4");
          digitalWrite(EnablePinMotor34, LOW);

}
if (inputString == "M5\n"){

          Serial.println ("STARTING MOTOR 5");

          Serial.println ("ENABLING MOTOR 5");
          digitalWrite(EnablePinMotor56, HIGH);

          Serial.println ("ACTIVATING MOTOR 5");
          analogWrite(PWM5, 175);

          Serial.println ("DISPENSING");
          delay(2000);

          Serial.println ("DEACTIVATING");
          analogWrite(PWM5, 0);

          Serial.println ("DISABLING MOTOR 5");
          digitalWrite(EnablePinMotor56, LOW);

}

if (inputString == "M6\n"){

          Serial.println ("STARTING MOTOR 6");

          Serial.println ("ENABLING MOTOR 6");
          digitalWrite(EnablePinMotor56, HIGH);

          Serial.println ("ACTIVATING MOTOR 6");
          analogWrite(PWM6, 175);

          Serial.println ("DISPENSING");
          delay(2000);

          Serial.println ("DEACTIVATING");

          analogWrite(PWM6, 0);

          Serial.println ("DISABLING MOTOR 6");
          digitalWrite(EnablePinMotor56, LOW);

}

}
void loop(){
buttonState();
motorControl();

/* if (button1State == HIGH) {
digitalWrite(EnablePinMotor12, HIGH);
Ledpin1 == HIGH;
analogWrite(PWM1, 175);
delay(2000);
digitalWrite(EnablePinMotor12, LOW);
Ledpin1 == LOW;
}
else {
digitalWrite(EnablePinMotor12, LOW);
}*/

if (stringComplete) { // print the string when a newline arrives:
Serial.println(inputString);
savedDrink = inputString;
// clear the string:
inputString = "";
stringComplete = false;
}
}
@

as you see in my code my if statement under my motorControl function will run certain motor based on a serial string input

The idea seems basic to me just simply call the mac address of the bluetooth module transmit the string but i know the coding is more complicated then that

can someone please help me Thank you

PS. Moderators i posted this where is best see fit but i wasn't sure so if there is a better place for this to be post it would be much appreciated if this topic was pushed to the most helpful location Thank you

Msamples795 · wrote on 26 Oct 2013, 19:54

oh and i also want to have show in the status bar connected but i'm sure if i could figure out the basics of using bluetooth i hopefully might be able to figure out how to say if the device is connected

kuzulis · wrote on 28 Oct 2013, 12:38

In case use Bluetooth SPP, you can try the QtSerialPort module.

In this case:

You should make a Bluetooth SPP connection between PC and Arduino (pair).
Use QSerialPortInfo to select desired serial device (will be the virtual serial port by Bluetooth connection on Windows or /dev/rfcommX on Linux).
Use QSerialPort to read/write your control commands.

PS: But the Qt Quick here no make sense.. Seems.. Because QtSerialPort can be use from the C++ code.

Msamples795 · wrote on 28 Oct 2013, 21:26

do you think you can link me an example of that so i can see what your talking about i am new to qt programming and i dont know how to install a module add-on for windows and i cant seem to find out how