MPI Send and Recieve | MPI Tutorials

Hi all

 I  wrote  a code which can sent 10 numbers from first process to another  process, then the other process will  resent the same data to first process.

It is an example code for understanding MPI Send and MPI Recieve functions

How to easily install OpenCV on Raspberry Pi

Hi all

      Building opencv source code in Raspberry Pi will take about 6-7 hours.

Here is the link to install opencv from source

Raspberry Pi+ OpenCV

Easy method to install opencv

1)Connect to Raspberry Pi using ssh. Fig shows an example of connecting Rpi using ssh

How to install Raspbian on Raspberry Pi

Hi all

    Recently i purchased a raspberry pi from Kits and spares. I am giving the link here
    http://shopping.kitsnspares.com/bon1/productdescription.asp?id=482662

    Installation instruction.

1)Select a memory card with  4 GB. Select 8GB or 16GB or  32GB will be good if you plan to do some heavy work on Raspberry Pi. Me selected the following sd card from sandisk. Here is the link

Purchase link from flipkart

Its a 32GB ,class 10 memory card from SanDisk

2)Select a good powersupply:  Raspberry Pi requires a charger with a rating 5V 500ma-1A adapter for  normal operation. But if you want to interface more device into Rpi, either select a good charger with 5V,2A or puchase a powered usb hub.

Adapter for normal operation

How to install Raspbian on sdcard from Ubuntu Linux

How to send data to a bluetooth module from a Linux machine

Hi Guys

    This is a quick tutorial for sending data from a linux pc to a bluetooth module.

I purchased a bluetooth module from sunrom. 

Connect this bluetooth module to an arduino or any interfacing board.

How to open and close a process from a python script

Hi guys

     I am giving some idea about  how we can start and stop a process using a python script. This will be useful when we need to start a process that is outside the script

I am running two python scripts. One is master script, this script will start the slave script. Slave script will execute continuously upto 5 sec and it will terminated by the master script

Master script

 #!/usr/bin/python  
 import time  
 import subprocess  
 #starting process python while.py  
 proc = subprocess.Popen(["python","while.py"],shell=False)  
 #5 sec delay  
 time.sleep(5)  
 #killing process  
 subprocess.call(["kill","-9","%d" % proc.pid])  
 #waiting for killing  
 proc.wait()  
 print 'poll = ',proc.poll()  

Slave script

 #!/usr/bin/python  
 while 1:  
      print "hello"  

Output
--------

It will print hello upto 5 seconds after that it will stop and show this message

Controlling Android Phones using Python and Linux

Hi all

  I am giving a brief tutorial on how to control android phone using python over wifi using PC.

Prerequisites on android phone

1)Wifi ADB Application: It is a tool for doing android debugging over wifi. Here is my previous tutorial about Wifi ADB

2)SL4A and Python for android

Prerequisites on PC

1)Ubuntu 12.04 

Procedure

1)Start wifi adb using above tutorial

2)Start a private server using SL4A.

New Arduino DUE

Hi all

   There is a newcomer in the arduino board series. It's arduino due. The main feature of this board is, it comes with an ARM based controller.

Technical Specification

Microcontroller                                           AT91SAM3X8E

Operating Voltage                                           3.3V

Input Voltage (recommended)                           7-12V

Input Voltage (limits)                                   6-20V

Digital I/O Pins                                           54 (of which 12 provide PWM output)

Analog Input Pins                                           12

Analog Outputs Pins                                   2 (DAC)

Total DC Output Current on all I/O lines           130 mA

DC Current for 3.3V Pin                                   800 mA

DC Current for 5V Pin                                   800 mA

Flash Memory                                                   512 KB 

SRAM                                                           96 KB (two banks: 64KB and 32KB)

Clock Speed                                                   84 MHz

Speech Recognition on arduino

Hi 

  I have seen a library for doing speech recognition on arduino. Check the following link for seeing more information.

Features

1. Letter based recognition
2. Small memory footprint
3. Arduino Compatible
4. No training required
5. Fixed point arithmetic
6. 30% - 40% accuracy if based on phonemes, up to 80% if based on words.
7. Plugs directly into an analogRead() port
   
   

http://arjo129.github.com/uSpeech/

Code on github