Bluetooth Arduino

Android Processing

danieloqu..

in Android Processing • 7 months ago

Hello friends, I first want to apologize for my English.

recently I started to use the library Ketai and could link it with arduino (I managed to turn on and off an LED) now, not just want to turn on the LED, also want to control the brightness using PWM. I created an application but I can not send the values to be read by the arduino. the application consists of a potentiometer knob. PLEASE if any of you has done something similar, I would greatly appreciate YOUR HELP.

the error: broadcast(byte[]) int ketai.net.bluetooth.KetaiBluetooth cannot be appiled to (int)

thanks.

Replies(5)

julienrat

Re: Bluetooth Arduino

7 months ago

yep,

I think you are trying to send a int instead a byte, try to send byte like this :

Processing code :

Copy code

byte[] data2 = {
's', 'w', 'i', 't', 'c', 'h', '\r'
};
bt.broadcast(data2);

and receive brodcast like this :

Arduino code

Copy code

String strInput = ""; // buffer for incoming packet
String strCompare = "switch";
char chByte = 0;
void setup() {
Serial3.begin(115200); //serial 3 of mega board
Serial.begin(9600);
pinMode(9,OUTPUT);
}
void loop()
{
while (Serial3.available() > 0)
{
// get incoming byte:
chByte = Serial3.read();
if (chByte == '\r')
{
Serial.println("strInput");
//compare input message
if(strInput.equals(strCompare))
{
digitalWrite(9, HIGH);
Serial.println("LED is ON");
delay(1000);
digitalWrite(9, LOW);
Serial.println("LED is OFF");
}
//reset strInput
strInput = "";
}
else{
strInput += chByte;
}
}
}

could you send us your code ?

danieloqu..

Re: Re: Bluetooth Arduino

7 months ago

Hi, thanks for the answer. I used this code to turn on an LED, but not exactly what I thought as my idea is to send values (numbers) and do not know how. My app consists of a scroll bar and the values increase as the bar goes up, then those values will be sent and read by the arduino. MY IDEA LIKE TO KNOW IF THERE IS CORRECT OR OTHERWISE. THANKS

julienrat

Re: Bluetooth Arduino

7 months ago

you must send bytes and not numbers, then you put in shape with Arduino

danieloqu..

Re: Bluetooth Arduino

7 months ago

hello friends, I tell them that it was solved only convert the integers to byte .. Processing and Arduino have the advantage of making it easy. thanks anyway for your assistance

Ja_Ha

Re: Bluetooth Arduino

7 months ago

Hi danieloqu.....

I want to control video playing on android device by the arduino.

How you connect arduino to procesing on android device.

Need your suggestions

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