serial communication with bluetooth module JY-MCU HC 06

Development Libraries
1

My code is designed for receiving some characters from android phone.
However, there is some problem I cant figure it out.

Code for arduino mega

#include <SoftwareSerial.h>
#include <Wire.h>
SoftwareSerial BT(10,11);

void setup()
{
Serial.begin(9600);
BT.begin(9600);
}

void loop()
{
byte string[20];
int insize;
while(1){
if ((insize=(BT.available()))>0)
{
Serial.print("input size = ");
Serial.println(insize);
for (int i=0; i<insize; i++) {
Serial.print(string*=char(BT.read()));*

  • Serial.println(" "); *
  • }//for*
  • } //if*
  • }//while*
    }
    such as signal,"abc"
    actual OUTPUT in serial manager
    input size = 1
    97
    input size = 2
    98
    99
    expected OUTPUT in serial manager
    input size = 3
    97
    98
    99
    I don't why the program run twice.
2

Now can you see why we ask you to use code tags when you post code?
Please edit your post to add the code tags.

3

Have a look at the examples in serial input basics. One of them will probably be suitable.

...R