Software Installations

Sunday, October 5, 2014

Installing OpenCV 2.4 in Ubuntu 14.04.1

Ubuntu 14.04.1
OpenCV 2.4
Python 2.7.6

Status:

20141005 OpenCV Python samples is working.
20141006 Installing MySql, Apache, PHP and PhpMyAdmin. (Apache=ok, PhpMyAdmin=no)
20141007 Try to fix apache (or php, or phpmyadmin) problem (don't start phpmyadmin configuration popup at instalation time)
20141008 Installing MySql managers (MySQL Workbench, Emma) and restoring "robot" database (manual creation of a new database and import sql file exported by the hp_centauro notebook.
20141009 robot_wsr_face_recognition app is working without any modification :)

Install:

sudo apt-get update
sudo apt-get install libcv2.4 libcv-dev libhighgui2.4 libhighgui-dev opencv-doc opencv-data libopencv-dev
Installing Python Libraries:
sudo apt-get install python-opencv python-dev python-webpy
Download OpenCV Library and Extract to "home" folder.
Copy OpenCV "data" folder into "samples" folder (otherwise python samples don't work)

Testing OpenCV Python samples:

cd ~/opencv-2.4.9/samples/python
copiar pasta "OpenCV"/data para "OpenCV"/samples
python ./facedetect.py 0
python ./motempl.py (contorno e movimento)
python ./laplace.py (contorno)

Installing PyFaces:

sudo apt-get install tix python-imaging-tk
Download pyfaces
Unzip to ~/pyfaces
cd ~/pyfaces
python pyfacescontroller.py (not working)

Installing som4r repository:

sudo apt-get install subversion

Installing Apache, MySql and PhP:

Saturday, September 27, 2014

Raspberry Pi - Pidora

Windows 7
SDFormatter 4.0
Win32DiskImager
PuTTY 0.63

Status:

2014 09 27 - Wi-Fi working.

Install:

Download Pidora Operating System image (http://downloads.raspberrypi.org/pidora_latest)
Unzip downloaded file.
Use Win32DiskImager to write the image to SD card.
Connect a keyboard (USB) and monitor (HDMI) to the Raspberry Pi board.
Boot Raspberry Pi board with SD card.

Configure:

Configure keyboard, timezone, create user "pi", set root password, enable SSH service and DVI adapter. Reboot.
Login with default user and password (pi raspberry).

Configure Wi-Fi:

su - (use root password)
Installing ifconfig package:
yum provides ifconfig
yum install net-tools wpa_supplicant dhclient
chkconfig wpa_supplicant on
service wpa_supplicant start
chkconfig NetworkManager on
service NetworkManager start
reboot
Login as root and configure Wi-Fi Network:
nmcli dev wifi con "myssid" password "myssidpassword"

Checking Network:

iwconfig
iwlist scan
pifconfig
ifconfig

Update:

Login as root.
yum update (zzz)

References:

Saturday, September 13, 2014

Installing Arduino IDE and Libs on Ubuntu 10.10 and Windows 7

Ubuntu 10.10
Windows 7 (64bits)
Arduino IDE 1.0.5 for Linux (32bits)
Arduino IDE 1.5.7 for Windows

Status:

2014.09.14 It's working.

Installing on Ubuntu:

sudo apt-get update
sudo apt-get install arduino openjdk-6-jre gcc-avr avr-libc
Plug and Check if Arduino device was detected (ttyACM0: USB ACM device):
lsusb
dmesg | grep tty

Download Arduino IDE.
Extract to /~ folder.

Setting the Permission on ttyACM0 (Linux only - All distro):

Check the owner group of the serial port:
ls -l /dev/ttyACM0
You will get something like "dialout" or "uucp".
Add our user (pi) to that group:
usermod -a -G dialout pi
Add our user (pi) to "lock" group (if you have filesystem-2012.6-2 or newer):
usermod -a -G lock pi

Installing on Windows:

Donwload and run Python for Windows.
Download and Install PySerial:
Download PySerial from http://pypi.python.org/pypi/pyserial. Unpack, enter the pyserial-x.y directory (DOS) and run the command bellow:
python setup.py install
Download Arduino IDE for Windows.

Testing - Linux and Windows:

Double click on /~/arduino-1.0.5/arduino and choose "Run" (arduino.exe on Windows).
Select a serial port (menu: Tools->Serial Port->dev/ttyACM0) (COM4 on Windows).
If there is no serial port available then try one of those options.
Select a board (menu: Tools->Board->Arduino Uno).
See examples (menu: File->Sketchbook).
Open file serial_echo.ino with Arduino IDE and Upload.

Testing with Python:

We don't need any privileges, like when working with Arduino IDE (chmod 777 /dev/ttyACM0).
python
import serial
On Linux:
ser=serial.Serial(port='/dev/ttyACM0', baudrate=500000, timeout=1)
On Windows:
ser=serial.Serial(port='COM4', baudrate=500000, timeout=1)
ser.write('Testing...\n')
print ser.readline()
ser.close()

References:

Sunday, September 7, 2014

Raspberry Pi - Raspbian - 2015

Windows 7
SDFormatter 4.0
Win32DiskImager
PuTTY 0.63
Raspbian 2015-02-16

Status:

05/04/2015 - Configuring Wi-Fi network
07/09/2014 - Access allowed (SSH through Raspberry Pi ethernet adapter).

Install:

Download Raspbian Operating System image (http://downloads.raspberrypi.org/raspbian_latest)
Unzip downloaded file.
Use Win32DiskImager (as administrator) to write the image to SD card on Windows.
Connect a keyboard (USB) and monitor (HDMI) to the Raspberry Pi board.
Boot Raspberry Pi board with SD card.

Configure:

Configure keyboard, timezone, ssh service and camera-support (raspi-config).
Login with default user and password (pi raspberry).
Configuring Wi-Fi:
sudo cp /etc/wpa_supplicant/wpa_supplicant.conf /etc/wpa_supplicant/wpa_supplicant.conf.orig
sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
Go to the bottom of the file and add the code bellow.

sudo cp /etc/network/interfaces /etc/network/interfaces.orig
Allow hotplug and dhcp client to wlan0 network interface:

Save the file and reboot system.
Check network status:
sudo ifconfig wlan0

Tip for ubuntu 16.04 Server:
Do not need wpa_supplicant.conf file, just config ssid and psk in /etc/network/interfaces file.
auto wlp3s0
iface wlp3s0 inet dhcp
wpa-ssid network-name
wpa-psk pre-shared-key
Configuring Ethernet cable network:
Allow hotplug to eth0 network interface:
sudo nano /etc/network/interfaces

Connect Ethernet cable to Raspberry Pi board.
sudo ifdown eth0
sudo ifup eth0
Check network status:
sudo ifconfig

sudo reboot
Connect the Raspbian OS through the network using ssh client (Putty for Windows).

Update packages:
sudo apt-get update

Troubleshoot:

With this interfaces file above, cannot use Realtek Wlan Adapter and keyboard at same time ("IRQ32 disabled after an error").
see file /var/log/syslog

References:

Sunday, August 31, 2014

Raspberry Pi - Python Libraries - Raspbian or Adafruit

Windows 7
Linux 3.1.9adafruit+ armv6l
PuTTY 0.63
WinSCP 5.5.5

Status:

20140830 Working both examples.

ToDo:

Choose the " best" Python API:

RPIO?
Arduino Nampy? - This library allows you to communicate with your Arduino connected via USB using classes and methods really similar to those in the Arduino framework. Behind the scenes , Nanpy communicates via USB with the server part running as Arduino firmware.
WiringPi?

OR use Serial Communication and pass commands to Arduino connected.

Install RPIO lib:

cd ~/
sudo apt-get install python-setuptools
sudo easy_install -U RPIO
git clone https://github.com/metachris/RPIO.git
cd RPIO
sudo python setup.py install

Testing RPIO lib:

cd ~/RPIO/examples
PWM Servo example:
python example3_pwm_servo.py

PWM LowLevel example:
python example4_pwm_lowlevel.py

Connect Raspberry Pi and Arduino:

sudo apt-get install python-serial
Call Python console:
python
>>>import serial
>>>ser = serial.Serial('/dev/ttyACM0', 500000)
>>>ser.readline()
>>>print ser
>>>ser.write('3')

Install Arduino lib:

sudo apt-get install arduino (see links 4 and 5 below)

References:

RPIO’s documentation
How to use GPIOs on raspberry pi (Simple I/O, PWM and UART)
Connect Raspberry Pi and Arduino with Serial USB Cable
Control your Arduino board with Raspberry Pi and Python (nanpy related)
NanPy - Server side of Arduino lib

Saturday, August 30, 2014

Raspberry Pi - Remote Access - Raspbian or Adafruit

Windows 7
Linux 3.1.9adafruit+ armv6l
PuTTY 0.63
WinSCP 5.5.5

Status:

20140906 OS Crashed. Building from scratch.
20140830 Working Wi-Fi, SSH and VNC (manual start).

ToDo:

Autostart of VNCServer it's not working.

Install - Wi-Fi:

Login using a keyboard (USB) and monitor (HDMI) connected to the raspberry board:
Default user and password: pi raspberry
Edit the file /etc/network/interfaces and change SSID and password of Wi-Fi network. See on the References links (below) how to encrypt the password.

sudo reboot

Install SSH Server:

Already installed by default.
To configure:
sudo raspi-config
Interfacing Options -> SSH
To access: Putty for Windows.

To transfer files: WinSCP (for Windows).

Install VNC Server:

sudo apt-get update
sudo apt-get install tightvncserver
tightvncserver
vncserver :0 -geometry 1920x1080 -depth 24
Configuring Autostart:
Create a file (~/vnc.sh):

cd ~/
chmod +x vnc.sh
./vnc.sh
Connect to Raspberry Desktop using VNC Viewer.

Configuring Autostart:
cd /etc/init.d/
Create a file (/etc/init.d/vncboot.sh)

chmod 755 vncboot
update-rc.d ./vncboot defaults (or update-rc.d /etc/init.d/vncboot defaults)
reboot

References:

Sunday, June 10, 2012

Flash Players - Clientes web para RTMP

Ubuntu 11.04

Red5 Streaming

Code:

https://github.com/som4r/som4r/tree/master/robot

Status:

20120610 Funcionando o cliente do streaming da webcam do usuário usando aplicacão camera_usuario.swf (flashbuilder) no joomla através do módulo e plugin denvideo (ver pasta /var/www/portal/images/denvideo).
20120609 Funcionando o cliente do streaming do red5 (local e remoto) usando jwplayer no joomla (wrapper para /camerarobo/index.php).

Todo:

Criar módulo para o streaming de vídeo da câmera do usuário (swfobject?).
Criar módulo para o streaming de vídeo da câmera do robô.

Players Info:

JW Player playback Flash and HTML5
DenVideo Joomla Extension

Flash Links:

Install:

Download JW Player (jwplayer.swf, jwplayer.js)

Links: