Bluetooth communication between Arduino and PyBluez

Question

I am trying to establish bluetooth communication between an Arduino Uno board (with a bluetooth shield) and my Linux OS, using Python PyBluez.

I've successfully paired my laptop to the Uno. I'm able to connect to the board, however the board is not reading the data being sent nor is it able to send data.

Here is the Arduino Sketch

#include <SoftwareSerial.h>

#define RxD 0    //receive data on digital 0
#define TxD 1 //transmit on digital 1

SoftwareSerial blueToothSerial(RxD, TxD);
int counter = 0;
int incoming;
void setup(void){
  Serial.begin(9600);
  //pinMode(RxD,INPUT);
  //pinMode(TxD,OUTPUT);
  setupBlueToothConnection();
}

void setupBlueToothConnection(){
  blueToothSerial.begin(19200);
  blueToothSerial.print("\r\n+STWMOD=0\r\n"); //set the bluetooth work in slave mode
  blueToothSerial.print("\r\n+STNA=SeeedBTSlave\r\n"); //set the bluetooth name as     "SeeedBTSlave"
  blueToothSerial.print("\r\n+STOAUT=1\r\n"); // Permit Paired device to connect me
  //blueToothSerial.print("\r\n+STAUTO=0\r\n"); // Auto-connection should be forbidden here
  delay(2000); // This delay is required.
  blueToothSerial.print("\r\n+INQ=1\r\n"); //make the slave bluetooth inquirable
  Serial.println("The slave bluetooth is inquirable!");
  delay(2000); // This delay is required.
  blueToothSerial.flush();
} 

void loop(){
  if(blueToothSerial.available())
     Serial.println(blueToothSerial.read());
  blueToothSerial.write('x');
}

And my Python Module:

import bluetooth
import sys
bd_addr = "00:12:10:23:10:18" #itade address

port = 1
sock=bluetooth.BluetoothSocket( bluetooth.RFCOMM )
sock.connect((bd_addr, port))
print 'Connected'
sock.settimeout(1.0)
sock.send("x")
print 'Sent data'

data = sock.recv(1)
print 'received [%s]'%data

sock.close()

I have Arduino IDE 1.0.4, my laptop is running Ubuntu 11.10

Can you send and receive data to/from Arduino board using Serial Monitor inside Arduino IDE? — 4d4c
Seems to work for me. I uploaded your script on my Arduino Uno. And executed the python script. This is the result: user@ubuntu:~/$ python w.py Connected Sent data received [2]. Are you sure that you have working connection to your Arduino and Bluetooth device? — 4d4c
@ton1c yes I can send/receive data through the serial monitor inside the Arduino IDE. — mingxiao

TomoMiha TomoMiha · Accepted Answer · 2017-08-26T14:40:12

This line of yours:

data = sock.recv(1)

may be not receiving enough bytes so try this info posted by Tim: Only receiving one byte from socket

Bluetooth communication between Arduino and PyBluez

2 Answers