Electronic – Arduino: What is the best way to receive and read Data with SoftwareSerial

arduinobluetoothserial

I have Arduino connected to a HC-06 bluetooth module.

I wan't to send data from some Android-Application I wrote to the Arduino and let Arduino do stuff depending on the received data. So far I'm Sending Integer values between 0 and 1024.

Unfortunately mySerial.read() won't come to an end here. It reads the Data as one big string.

My Modules RX and TX pin are connected to my Arduinos RX- and TX pin. (The console didn't show any data when I connected them to Port 10 and 11, so I thought this is how SoftwareSerial defines the RX and TX Port of Arduino…)

My Sketch:

#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
char character;
void setup()  
{
  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);

}
void loop() // run over and over
{
    String Data = "";
    while(mySerial.available()) {
     character = mySerial.read();
     Data.concat(character);
    // Serial.println(Data);
     Serial.println("foo");
    }

This will output:

154888143201270341421501588671750825906975101110241005969922864792711629540451369290213140600

I can't read this data properly and I can't parse the data to some function to handle it, because mySerial.read() won't come to an end. There must be a better way to receive or send this Data.

My Bluetooth Output Stream Source:

public void sendPWM(int progress) {
            OutputStream tmpOut = null;
            try {
                tmpOut = mmSocket.getOutputStream();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                Log.e("error", "NO OUTPUT STREAM", e);
                e.printStackTrace();
                return;
            }

            try {
                // byte[] buffer = stringToBytesUTFCustom("1");

                byte[] buffer = String.valueOf(progress).getBytes();
                tmpOut.write(buffer);

                // tmpOut.flush(); /*I have turned this ON and OFF, to see if it
                // makes any difference*/

            } catch (IOException e) {
                // TODO Auto-generated catch block
                Log.e("error", "EXCEPTION DURING WRITE", e);
                e.printStackTrace();
            }

        }

I don't close the outputStream, because this will also cancel the connection with the HC-06 and I have to send a lot of data. I can't let the user reconnect to the module each time he sends data. Can you help me out here?

Best Answer

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX
String Data = "";

void setup()  
{
    mySerial.begin(9600);
}

void loop() // run over and over
{
    while (mySerial.available())
    {
        char character = mySerial.read(); // Receive a single character from the software serial port
        Data.concat(character); // Add the received character to the receive buffer
        if (character == '\n')
        {
            Serial.print("Received: ");
            Serial.println(Data);

            // Add your code to parse the received line here....

            // Clear receive buffer so we're ready to receive the next line
            Data = "";
        }
    }
}
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