วันจันทร์ที่ 5 ตุลาคม พ.ศ. 2558

How to compile nginx with nginx-rtmp-module

Prepare environment for compile.
$ sudo apt-get update
$ sudo apt-get install libpcre3-dev libatomic-ops-dev libgeoip-dev geoip-bin geoip-database geoip-database-extra libperl-dev libssl-dev libxml2-dev libxslt1-dev

Create directory src

$ mkdir src

Download Nginx (last version)

$ cd src
$ wget http://nginx.org/download/nginx-1.9.5.tar.gz
$ tar -xvzf nginx-1.9.5.tar.gz

Git Clone nginx-rtmp-module

$ git clone https://github.com/arut/nginx-rtmp-module.git


Change current to nginx-1.9.5

$ cd nginx-1.9.5

Run configure

$ ./configure --prefix=/usr/local/nginx --user=www-data --group=www-data --with-select_module --with-poll_module --with-threads --with-file-aio --with-ipv6 --with-http_ssl_module --with-http_realip_module --with-http_addition_module --with-http_xslt_module --with-http_image_filter_module --with-http_geoip_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module  --with-http_auth_request_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_stub_status_module --with-http_perl_module --with-mail --with-mail_ssl_module --with-pcre --with-pcre-jit --with-md5-asm --with-sha1-asm --with-libatomic --with-pcre --with-stream --with-stream_ssl_module --with-http_v2_module --add-module=../nginx-rtmp-module

Run make to compile

$ make

Install nginx to /usr/local/nginx

$ sudo make install

Config Nginx on /usr/local/nginx/conf/nginx.conf

$ sudo nano /usr/local/nginx/conf/nginx.conf


Config for streaming server see on nginx-rtmp-module wiki

Web path /usr/local/nginx/html

Start nginx service

$ sudo /usr/local/nginx/sbin/nginx

Stop nginx service

$ sudo /usr/local/nginx/sbin/nginx -s stop


Reference
Nginx

nginx-rtmp-module (source code)

nginx-rtmp-module (wiki)

Streaming with nginx-rtmp-module


วันพุธที่ 30 กันยายน พ.ศ. 2558

Install font to OpenELEC

How to install new font to OpenELEC

Login with root to OpenELEC.

# mkdir -p /storage/.xbmc/media/Fonts
or
# mkdir -p /storage/.kodi/media/Fonts

Upload truetype font to this path.

Reboot OpenELEC again.


How to Disable Power Management of rtl8192cu

Fix problem wireless disconnect and go to save mode.

Create file /etc/modprobe.d/8192cu.conf

$ sudo nano /etc/modprobe.d/8192cu.conf

add this line

options 8192cu rtw_power_mgnt=0 rtw_enusbss=0


Restart raspberry pi



Reference :

https://github.com/xbianonpi/xbian/issues/217

https://github.com/pvaret/rtl8192cu-fixes/blob/master/8192cu-disable-power-management.conf

DLNA/UPnP with MiniDLNA

How to build DLNA/UPnP Server on Raspberry PI for use at Home device.
(Example TV, Media player, PS3, Xbox etc.)


Install minidlna package

$ sudo apt-get install minidlna


Add pi user to minidlna group

$ sudo usermod -a -G minidlna pi

Create Directory for store media file

Example:

$ mkdir -p /home/pi/minidlna/music
$ mkdir -p /home/pi/minidlna/pictures
$ mkdir -p /home/pi/minidlna/videos
$ mkdir -p /home/pi/.minidlna

Change Mode of /home/pi/minidlna and /home/pi/.minidlna
$ sudo chmod 777 /home/pi/minidlna
$ sudo chmod 777 /home/pi/.minidlna

Config MiniDLNA

$ sudo nano /etc/minidlna.conf

Modify this file
...
db_dir=/home/pi/.minidlna/data
log_dir=/home/pi/.minidlna/data/log
# * "A" for audio (eg. media_dir=A,/var/lib/minidlna/music)
# * "P" for pictures (eg. media_dir=P,/var/lib/minidlna/pictures)
# * "V" for video (eg. media_dir=V,/var/lib/minidlna/videos)
media_dir=A,/home/pi/minidlna/music
media_dir=P,/home/pi/minidlna/pictures
media_dir=V,/home/pi/minidlna/videos
# Name that the DLNA server presents to clients.
friendly_name=RASPBERRY DLNA
# Automatic discovery of new files in the media_dir directory.
inotify=yes
# Notify interval, in seconds.notify_interval=895...

Restart MiniDLNA Service

$ sudo /etc/init.d/minidlna restart

Or re-indexing all of media files

$ sudo /etc/init.d/minidlan force-reload



Test on Device supported with DLNA/UPnP to play media.




Reference:

Digital Living Network Alliance
https://en.wikipedia.org/wiki/Digital_Living_Network_Alliance

ReadyMedia (MiniDLNA Source Code)
http://sourceforge.net/projects/minidlna/

ReadyMedia (Wiki of Archlinux)
https://wiki.archlinux.org/index.php/ReadyMedia

วันอังคารที่ 11 สิงหาคม พ.ศ. 2558

How to use own remote control for OpenELEC

IR Receiver (TSOP44.., TSOP48.., TSOP38238, ...)


Connect IR Receiver to Raspberry Pi

Vcc -> 3V
GND -> GND
Vout -> GPIO 18








Load LIRC module on boot.
Edit /boot/config.txt
Add line

dtoverlay=lirc-rpi

or (change GPIO pin in for IR Receiver)

dtoverlay=lirc-rpi,gpio_out_pin=17,gpio_in_pin=18

See on : https://github.com/raspberrypi/firmware/tree/master/boot/overlays

Learning own remote control

Kill Process of LIRCD

# killall lircd

Start learning remote control button.

# irrecord /storage/.config/lircd.conf

irrecord -  application for recording IR-codes for usage with lirc

Copyright (C) 1998,1999 Christoph Bartelmus(lirc@bartelmus.de)

This program will record the signals from your remote control
and create a config file for lircd.


A proper config file for lircd is maybe the most vital part of this
package, so you should invest some time to create a working config
file. Although I put a good deal of effort in this program it is often
not possible to automatically recognize all features of a remote
control. Often short-comings of the receiver hardware make it nearly
impossible. If you have problems to create a config file READ THE
DOCUMENTATION of this package, especially section "Adding new remote
controls" for how to get help.

If there already is a remote control of the same brand available at
http://www.lirc.org/remotes/ you might also want to try using such a
remote as a template. The config files already contain all
parameters of the protocol used by remotes of a certain brand and
knowing these parameters makes the job of this program much
easier. There are also template files for the most common protocols
available in the remotes/generic/ directory of the source
distribution of this package. You can use a template files by
providing the path of the file as command line parameter.

Please send the finished config files to  so that I
can make them available to others. Don't forget to put all information
that you can get about the remote control in the header of the file.

Press RETURN to continue.


Now start pressing buttons on your remote control.

It is very important that you press many different buttons and hold them
down for approximately one second. Each button should generate at least one
dot but in no case more than ten dots of output.
Don't stop pressing buttons until two lines of dots (2x80) have been
generated.

Press RETURN now to start recording.

................................................................................
Found const length: 107201
Please keep on pressing buttons like described above.
................................................................................
Space/pulse encoded remote control found.
Signal length is 67.
Found possible header: 8951 4451
Found trail pulse: 572
Found repeat code: 8961 2214
Signals are space encoded.
Signal length is 32
Now enter the names for the buttons.

Please enter the name for the next button (press  to finish recording)
KEY_POWER

Now hold down button "KEY_POWER".

Please enter the name for the next button (press  to finish recording)
KEY_1

Now hold down button "KEY_1".

Please enter the name for the next button (press  to finish recording)
KEY_2

Now hold down button "KEY_2".

Please enter the name for the next button (press  to finish recording)
KEY_3

Now hold down button "KEY_3".

Please enter the name for the next button (press  to finish recording)
...


If you want to know irrecord key and button name list, use this command.

# irrecord --list

It will display list of key and button name.

IR Remote Key for OpenELEC on Raspberry PI (See on file /etc/lirc/lircd.conf.rpi)

KEY_POWER
KEY_1
KEY_2
KEY_3
KEY_4
KEY_5
KEY_6
KEY_7
KEY_8
KEY_9
KEY_0
KEY_VOLUMEUP
KEY_VOLUMEDOWN
KEY_MUTE
KEY_EXIT
KEY_CHANNELUP
KEY_CHANNELDOWN
KEY_INFO
KEY_UP
KEY_LEFT
KEY_RIGHT
KEY_DOWN
KEY_OK
KEY_MENU
KEY_AUDIO
KEY_VIDEO
KEY_BACKSPACE
KEY_PLAY
KEY_PAUSE
KEY_FORWARD
KEY_STOP
KEY_RADIO
KEY_TEXT
KEY_TITLE
After finish all key. Press Enter for finished.

(If you type incorrect or some problem about step, delete file /storage/.config/lircd.conf and run irrecord command)

Reboot OpenELEC.

# shutdown -r now

Test IR Remote for control menu on OpenELEC.



Reference :

Device Tree overlays
https://github.com/raspberrypi/firmware/tree/master/boot/overlays

Guide To lirc rpi GPIO Receiver
http://wiki.openelec.tv/index.php?title=Guide_To_lirc_rpi_GPIO_Receiver

Guide to add your own remote
http://wiki.openelec.tv/index.php/Guide_to_add_your_own_remote

วันเสาร์ที่ 18 กรกฎาคม พ.ศ. 2558

VNC Server for Raspberry PI with dispmanx

You can remote console of raspberry pi with dispmanx


Install libvncserver-dev, gcc and g++ version 4.7

$ sudo apt-get install gcc-4.7 g++-4.7 libvncserver-dev

Update alternatives version of gcc and g++

$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.6

$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.7 40 --slave /usr/bin/g++ g++ /usr/bin/g++-4.7

Select gcc and g++ version to 4.7 (2)

$ sudo update-alternatives --config gcc
There are 2 choices for the alternative gcc (providing /usr/bin/gcc).

Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/bin/gcc-4.6 60 auto mode
1 /usr/bin/gcc-4.6 60 manual mode
2 /usr/bin/gcc-4.7 40 manual mode

Press enter to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/bin/gcc-4.7 to provide /usr/bin/gcc (gcc) in manual mode
See on : https://github.com/Na1w/dispmanx_vnc

Clone source code of dispmanx.
$ git clone https://github.com/Na1w/dispmanx_vnc.git

Compile dispmanx.

$ cd dispmanx_vnc
$ make
After compile finish. It has dispmanx_vncserver file.
Copy this file to execute path. example /bin, /usr/local/bin, etc.


If you want to use X, modprobe  evdev first.

$ sudo modprobe evdev
See on : https://github.com/hanzelpeter/dispmanx_vnc


Start dispmanx vncserver

$ sudo dispmanx_vncserver
*** default port 5900

Stop dispmanx vncserver with Control + C Key.



Start dispmanx vncserver with password

$ sudo dispmanx_vncserver -P [password]

Change port number

$ sudo dispmanx_vncserver -p [port number]


Screen resolution config on /boot/config.txt

Example (1280x1024)
#HDMI force hotplug
hdmi_force_hotplug=1
# Group DMT
hdmi_group=2
# mode 35 - 1280x1024 60Hz
hdmi_mode=35
Reboot after save config.

Reference:

dispmanx_vnc
https://github.com/hanzelpeter/dispmanx_vnc

https://github.com/Na1w/dispmanx_vnc

Raspberry PI Document configuration config.txt
https://www.raspberrypi.org/documentation/configuration/config-txt.md

วันพฤหัสบดีที่ 16 กรกฎาคม พ.ศ. 2558

How to use VNC Server on Raspberry PI

If you want to remote to Raspbian with X Windows Desktop, you can use vnc server.

Install TightVNC Server.

$ sudo apt-get install tightvncserver

After install finished.

Start vncserver.

$ tightvncserver :<DISPLAY NUMBER>

Example: Start VNC Server on Display number 1 or port 5901 run with pi user.
$ tightvncserver :1

You will require a password to access your desktops.

Password: 
Verify: 

Would you like to enter a view-only password (y/n)? n


New 'X' desktop is raspberrypi:1


Creating default startup script /home/pi/.vnc/xstartup

Starting applications specified in /home/pi/.vnc/xstartup

Log file is /home/pi/.vnc/raspberrypi:1.log

On first time run script. Program will ask password for connect to VNC Server and ask view-only mode for this password.



After run tightvncserver. You can use TightVNC Viewer or VNC Client for remote to server.

Enter IP Address : Display number and Connect


Enter Password and OK

Connected to VNC Server


If you want to change vnc password for remote, use this command.
$ tightvncpasswd
Using password file /home/pi/.vnc/passwd
Password:
Verify:
Would you like to enter a view-only password (y/n)? n

VNC Password File save on /<User Directory>/.vnc/passwd


Stop VNC Server

$ tightvncserver -kill :<DISPLAY NUMBER>

Example : Stop VNC Server Display number 1

$ tightvncserver -kill :1

Screen resolution of VNC.
Start VNC Server with option.

$ tightvncserver -geometry <width>x<height> -depth <color depth>

Example

$ tightvncserver -geometry 1280x720 -depth 16 :1

Reference :

TightVNC
http://tightvnc.org/


วันอังคารที่ 7 กรกฎาคม พ.ศ. 2558

How to use DS3231 I2C Real Time Clock



Before use DS3231 I2C Real Time Clock. Enable I2C Interface.

On new kernel use Device Tree Overlays.

Edit on /boot/config.txt.

add new line

device_tree_param=i2c1=on
dtoverlay=i2c-rtc,ds3231

Reference : https://github.com/raspberrypi/firmware/tree/master/boot/overlays

Edit on /etc/modprobe.d/raspi-blacklist.conf

add # (comment) on line "blacklist i2c-bcm2708"

#blacklist i2c-bcm2708

Reboot Raspberry PI

sudo shutdown -r now

Re-Check I2C Interface software

$ dmesg | grep i2c
[    5.505513] bcm2708_i2c 20804000.i2c: BSC1 Controller at 0x20804000 (irq 79) (baudrate 100000)
[   11.969815] i2c /dev entries driver

$ lsmod
i2c_bcm2708             6244  0

If you found, software is enabled.


Install DS3231 I2C RTC to Raspberry PI



Test to get time from RTC Module.

$ sudo hwclock -r 
Tue 07 Jul 2015 05:20:09 PM ICT  -0.397656 seconds 

If you want to current time of Raspberry PI to RTC Module.

$ sudo hwclock -w

If you want to set time of RTC Module to Raspberry PI.

$ sudo hwclock -s

You can set time of RTC Module to Raspberry PI on startup.

Edit on file /etc/rc.local
Add line

/sbin/hwclock -s

before line "exit 0"


Reference :
Device Tree overlays of Raspberry PI Firmware
https://github.com/raspberrypi/firmware/tree/master/boot/overlays
Adding a hardware clock to Raspberry Pi (DS3231)
http://www.drewkeller.com/blog/adding-hardware-clock-raspberry-pi-ds3231
Adding a DS3231 Real Time Clock To The Raspberry Pi
http://www.raspberrypi-spy.co.uk/2015/05/adding-a-ds3231-real-time-clock-to-the-raspberry-pi/
Using an I2C Real Time Clock (RTC) with a Raspberry Pi
https://nicegear.co.nz/blog/using-an-i2c-real-time-clock-rtc-with-a-raspberry-pi/

How to use RFID-RC522 on Raspbian



Before use RFID-RC522. Enable SPI Interface (Device Tree Overlays)

On new kernel use Device Tree Overlays.

Edit on /boot/config.txt.

add new line

device_tree_param=spi=on
dtoverlay=spi-bcm2708


Edit on /etc/modprobe.d/raspi-blacklist.conf

add # (comment) on line "blacklist spi-bcm2708"

#blacklist spi-bcm2708

Reboot Raspberry PI

sudo shutdown -r now

Re-Check SPI Interface software

$ dmesg | grep spi
[    5.408904] bcm2708_spi 20204000.spi: master is unqueued, this is deprecated
[    5.659213] bcm2708_spi 20204000.spi: SPI Controller at 0x20204000 (irq 80)

$ lsmod
spi_bcm2708             6010  0

If you found, software is enabled.

Install Software for use RFID-RC522
Install python-dev

sudo apt-get install python-dev

Install SPI-Py (Hardware SPI as a C Extension for Python)

git clone https://github.com/lthiery/SPI-Py.git
cd SPI-Py
sudo python setup.py install

Install MFRC522-python

git clone https://github.com/mxgxw/MFRC522-python.git 
cd MFRC522-python 



Install Pins between Raspberry PI and RFID-RC522

RFID-RC522 Pin
 Raspberry PI Pin
Raspberry PI Pin name
SDA
  24
    GPIO8
SCK
  23
    GPIO11
MOSI
  19
    GPIO10
MISO
  21
    GPIO9
IRQ
  None
    None
GND
  Any
    Any Ground
RST
  22
    GPIO25
3.3V
  1
    3V3

You can test read card.
sudo python Read.py
Welcome to the MFRC522 data read example
Press Ctrl-C to stop.
If touch the card, it will display.

Welcome to the MFRC522 data read example
Press Ctrl-C to stop.
Card detected
Card read UID: XX,XX,XX,XX
Size: 8
Sector 8 [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
Ctrl+C for Stop.

And test write card.

$ sudo python Write.py
Card detected
Card read UID: XX,XX,XX,XX
Size: 8

Sector 8 looked like this:
Sector 8 [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

Sector 8 will now be filled with 0xFF:
4 backdata &0x0F == 0x0A 10
Data written

It now looks like this:
Sector 8 [255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]

Now we fill it with 0x00:
4 backdata &0x0F == 0x0A 10
Data written

It is now empty:
Sector 8 [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

You can learning python code for use RFID read and write data.



and other python library : https://github.com/ondryaso/pi-rc522



Example Project for use NFC and Raspberry PI


  • Attendance system using Raspberry Pi and NFC Tag reader by Yim

http://www.instructables.com/id/Attendance-system-using-Raspberry-Pi-and-NFC-Tag-r/


Reference : 

Device Tree overlays of Raspberry PI Firmware
SPI-PY
MFRC522-python
MIFARE (MFRC522) datasheet
PI-RC522