problem:char taking more than one value

Projects Programming
1

I have been trying to control RGB strip through an app using arduino (uno) and HC-05 bluetooth module. The app sends data in the form of FFFFFF.
I have tried storing the incoming bit into char and storing it in an array. But the char is storing all the incoming bits.
This is the sample code

#include <SoftwareSerial.h>
const int red = A0;
const int green = A1;
const int blue = A2;
char input[6];
int i = 0;

SoftwareSerial BTSerial(10, 11); // RX | TX
void setup()
{
  Serial.begin(9600);
  //Serial.println('Enter commands:');
  BTSerial.begin(38400);  // HC-05 default speed in AT command more
}

void loop()
{

  // Keep reading from HC-05 and send to Arduino Serial Monitor
  if (BTSerial.available()){
    if(BTSerial.available() && (i < 6)){
      char ch = (char)BTSerial.read();
      input[i] = ch;
      i++;
    }
    Serial.print(input[0]);
  }
}

Instead of getting only the first character I'm getting the entire string

FFFFFF

where as input[1] shows empty.
I have tried to split up this string in many ways but to no avail.
Can someone please tell me why this is happening and how to rectify this?

2

chitritha:
I have been trying to control RGB strip through an app using arduino (uno) and HC-05 bluetooth module. The app sends data in the form of FFFFFF.

that looks like three bytes to me.

byte smallestByte = 0x0;  // == zero
byte biggestByte = 0xFF;  // == 255
3

Are you printing input[0] six times?

4

Have a look at the examples in Serial Input Basics - simple reliable ways to receive data.

...R

5

evanmars:
Are you printing input[0] six times?

It will print input[0] once for each character received. It's just that any characters after the first six are not stored.