NanoPi 2 Fire
Contents
- 1 Introduction
- 2 Hardware Spec
- 3 Diagram, Layout and Dimension
- 4 Get Started
- 5 Work with FriendlyCore
- 5.1 Introduction
- 5.2 System Login
- 5.3 Configure System with npi-config
- 5.4 Develop Qt Application
- 5.5 Setup Program to AutoRun
- 5.6 Extend TF Card's Section
- 5.7 Transfer files using Bluetooth
- 5.8 WiFi
- 5.9 Ethernet Connection
- 5.10 Custom welcome message
- 5.11 Modify timezone
- 5.12 Set Audio Device
- 5.13 Run Qt 5.10.0 Demo with GPU acceleration
- 5.14 Run Qt 5.10.0 Demo with OpenGL
- 5.15 Play HD Video with Hardware-decoding
- 5.16 Connect to DVP Camera CAM500B
- 5.17 Power Off and Schedule Power On
- 5.18 Installing and Using OpenCV 4.1.2
- 5.19 Installing and Using Caffe
- 6 Update Log
- 6.1 2023-01-09
- 6.2 2020-10-26
- 6.3 2019-12-28
- 6.4 2019-11-26
- 6.5 2019-11-14
- 6.6 2019-10-18
- 6.7 2019-09-30
- 6.8 2019-07-18
- 6.9 2019-06-25
- 6.10 2019-06-03
- 6.11 2019-01-24
- 6.12 2018-12-17
- 6.13 March-04-2016
- 6.14 March-09-2016
- 6.15 March-23-2016
- 6.16 March-27-2016
- 6.17 April-08-2016
- 6.18 June-30-2016
- 6.19 Sep-04-2016
- 6.20 Sep-27-2016
- 6.21 Nov-2-2016
- 6.22 Nov-17-2016
- 6.23 Dec-7-2016
- 6.24 June-13-2016
- 6.25 June-20-2016
1 Introduction
- The NanoPi 2 Fire is a high performance ARM Board developed by FriendlyARM for Hobbyists, Makers and Hackers for IOT projects. It features Samsung's Cortex-A9 Quad Core S5P4418@1.4GHz SoC and 1G 32bit DDR3 RAM. It has a Gbps Ethernet port. It boots Android and Debian from a TF card. It integrates an HDMI and LCD interface. Its adoption of the Raspberry Pi's GPIO pin header makes it compatible with both Raspberry Pi's external GPIO modules and Arduino's shield boards. Its PCB dimension is 75 x 40 mm.
2 Hardware Spec
- CPU: S5P4418, 1.4GHz
- RAM: 1GB DDR3
- Connectivity: Gbps Ethernet port
- PMU Power Management: AXP228, support software power-off, sleep and wakeup functions
- USB 2.0 Type A x 1
- Debug Serial Port/UART0 x 1
- microSD Slot x 1
- microUSB x 1: for data transmission and power input
- LCD Interface: 0.5 mm pitch SMT FPC seat, for full-color LCD (RGB: 8-8-8)
- HDMI: HDMI 1.4A, Type-A, 1080P60
- DVP Camera Interface: 0.5mm spacing FPC socket. It includes ITU-R BT 601/656 8-bit, I2C and IO
- GPIO: 2.54mm spacing 40pin, compatible with Raspberry Pi's GPIO. It includes UART, SPI, I2C, PWM, IO etc
- Button: Power Button x 1, Reset Button x 1
- LED: LED for Power Indication x 1, System LED x 1
- PCB Dimension: 75 x 40mm
- Power: DC 5V/2A
- Temperature measuring range: -20℃ to 80℃
- OS: Android, Debian
3 Diagram, Layout and Dimension
3.1 Layout
- GPIO Pin Spec
Pin# Name Pin# Name 1 SYS_3.3V 2 VDD_5V 3 I2C0_SDA 4 VDD_5V 5 I2C0_SCL 6 DGND 7 GPIOD8/PPM 8 UART3_TXD/GPIOD21 9 DGND 10 UART3_RXD/GPIOD17 11 UART4_TX/GPIOB29 12 GPIOD1/PWM0 13 GPIOB30 14 DGND 15 GPIOB31 16 GPIOC14/PWM2 17 SYS_3.3V 18 GPIOB27 19 SPI0_MOSI/GPIOC31 20 DGND 21 SPI0_MISO/GPIOD0 22 UART4_RX/GPIOB28 23 SPI0_CLK/GPIOC29 24 SPI0_CS/GPIOC30 25 DGND 26 GPIOB26 27 I2C1_SDA 28 I2C1_SCL 29 GPIOC8 30 DGND 31 GPIOC7 32 GPIOC28 33 GPIOC13/PWM1 34 DGND 35 SPI2_MISO/GPIOC11 36 SPI2_CS/GPIOC10 37 AliveGPIO3 38 SPI2_MOSI/GPIOC12 39 DGND 40 SPI2_CLK/GPIOC9
- Debug Port(UART0)
Pin# Name 1 DGND 2 VDD_5V 3 UART_TXD0 4 UART_RXD0
- DVP Camera Interface Pin Spec
Pin# Name 1, 2 SYS_3.3V 7,9,13,15,24 DGND 3 I2C0_SCL 4 I2C0_SDA 5 GPIOB14 6 GPIOB16 8,10 NC 11 VSYNC 12 HREF 14 PCLK 16-23 Data bit7-0
- RGB LCD Interface Pin Spec
Pin# Name Description 1, 2 VDD_5V 5V output, LCD power 11,20,29, 37,38,39,40, 45 DGND ground 3-10 Blue LSB to MSB RGB Blue 12-19 Green LSB to MSB RGB Green 21-28 Red LSB to MSB RGB Red 30 GPIOB25 available for users 31 GPIOC15 occupied by FriendlyARM one wire technology to recognize LCD models and control backlight and implement resistive touch, not applicable for users 32 XnRSTOUT Form CPU low when system is reset 33 VDEN signal the external LCD that data is valid on the data bus 34 VSYNC vertical synchronization 35 HSYNC horizontal synchronization 36 LCDCLK LCD clock, Pixel frequency 41 I2C2_SCL I2C2 clock signal, for capacitive touch's data transmission 42 I2C2_SDA I2C2 data signal, for capacitive touch's data transmission 43 GPIOC16 interrupt pin for capacitive touch, used with I2C2 44 NC not connected
- Note
- SYS_3.3V: 3.3V power output
- VDD_5V: 5V power input/output. When the external device’s power is greater than the MicroUSB’s the external device is charging the board otherwise the board powers the external device. The input range is 4.7V ~ 5.6V
- For more details please refer to the document:NanoPi2_Fire_1512B_Schematic.pdf
3.2 Board Dimension
- For more details please refer to the document:NanoPi2_Fire_1512B_Dimensions(dxf).zip
4 Get Started
4.1 Essentials You Need
Before play with your NanoPi 2 Fire please get the following items ready
- NanoPi 2 Fire
- microSD Card/TFCard: Class 10 or Above, minimum 8GB SDHC
- microUSB power. A 5V/2A power is a must
- HDMI monitor or LCD
- USB keyboard and mouse
- A Host running Ubuntu 16.04 64 bit system
4.2 Extend SD Card Section
- When Debian/Ubuntu is loaded the SD card's section will be automatically extended.
- When Android is loaded you need to run the following commands on your host PC to extend your SD card's section:
sudo umount /dev/sdx? sudo parted /dev/sdx unit % resizepart 4 100 resizepart 7 100 unit MB print sudo resize2fs -f /dev/sdx7
(Note: you need to replace "/dev/sdx" with the device name in your system)
4.3 LCD/HDMI Resolution
When the system boots our uboot will check whether it is connected to an LCD or to an HDMI monitor. If it recognizes an LCD it will configure its resolution. Our uboot defaults to the HDMI 720P configuration.
If you want to modify the LCD resolution you can modify file "arch/arm/plat-s5p4418/nanopi2/lcds.c" in the kernel and recompile it.
If your NanoPi2-Fire is connected to an HDMI monitor and it runs Android it will automatically set the resolution to an appropriate HDMI mode by checking the "EDID". If your NanoPi2-Fire is connected to an HDMI monitor and it runs Debian by default it will set the resolution to the HDMI 720P configuration. If you want to modify the HDMI resolution to 1080P modify your kernel's configuration as explained above.
4.4 Update SD Card's boot parameters From PC Host
Insert your SD card into a host PC running Linux, if you want to change your kernel command line parameters you can do it via the fw_setevn utility.
Check the current Command Line:
git clone https://github.com/friendlyarm/sd-fuse_nanopi2.git
cd sd-fuse_nanopi2/tools
./fw_printenv /dev/sdx | grep bootargs
For example, to disable android SELinux, You can change it this way:
./fw_setenv /dev/sdc bootargs XXX androidboot.selinux=permissive
The "XXX" stands for the original bootargs' value.
4.5 Run Android or Linux (TODO)
- 将制作好SD卡插入NanoPi2-Fire,连接HDMI,连接电源(5V 2A), NanoPi2-Fire会从SD卡启动。你可以看到板上PWR灯常亮,LED1灯闪烁,这说明系统已经开始启动了,同时电视上也将能看到系统启动的画面。
- 要在电视上进行操作,你需要连接USB鼠标和键盘;如果你选购了LCD配件,则可以直接使用LCD上面的触摸屏进行操作。
5 Work with FriendlyCore
5.1 Introduction
FriendlyCore is a light Linux system without X-windows, based on ubuntu core, It uses the Qt-Embedded's GUI and is popular in industrial and enterprise applications.
Besides the regular Ubuntu core's features our FriendlyCore has the following additional features:
- it supports our LCDs with both capacitive touch and resistive touch(S700, X710, HD702, S430, HD101 and S70)
- it supports WiFi
- it supports Ethernet
- it supports Bluetooth and has been installed with bluez utilities
- it supports audio playing
- it supports Qt 5.10.0 EGLES and OpenGL ES1.1/2.0 (Only for S5P4418/S5P6818)
5.2 System Login
- If your board is connected to an HDMI monitor you need to use a USB mouse and keyboard.
- If you want to do kernel development you need to use a serial communication board, ie a PSU-ONECOM board, which will
For example, NanoPi-M1:
You can use a USB to Serial conversion board too.
Make sure you use a 5V/2A power to power your board from its MicroUSB port:
For example, NanoPi-NEO2:
- FriendlyCore User Accounts:
Non-root User:
User Name: pi Password: pi
Root:
User Name: root Password: fa
The system is automatically logged in as "pi". You can do "sudo npi-config" to disable auto login.
- Update packages
$ sudo apt-get update
5.3 Configure System with npi-config
The npi-config is a commandline utility which can be used to initialize system configurations such as user password, system language, time zone, Hostname, SSH switch , Auto login and etc. Type the following command to run this utility.
$ sudo npi-config
Here is how npi-config's GUI looks like:
5.4 Develop Qt Application
Please refer to: How to Build and Install Qt Application for FriendlyELEC Boards
5.5 Setup Program to AutoRun
You can setup a program to autorun on system boot with npi-config:
sudo npi-config
Go to Boot Options -> Autologin -> Qt/Embedded, select Enable and reboot.
5.6 Extend TF Card's Section
When FriendlyCore is loaded the TF card's section will be automatically extended.You can check the section's size by running the following command:
$ df -h
5.7 Transfer files using Bluetooth
Take the example of transferring files to the mobile phone. First, set your mobile phone Bluetooth to detectable status, then execute the following command to start Bluetooth search.:
hcitool scan
Search results look like:
Scanning ... 2C:8A:72:1D:46:02 HTC6525LVW
This means that a mobile phone named HTC6525LVW is searched. We write down the MAC address in front of the phone name, and then use the sdptool command to view the Bluetooth service supported by the phone:
sdptool browser 2C:8A:72:1D:46:02
Note: Please replace the MAC address in the above command with the actual Bluetooth MAC address of the mobile phone.
This command will detail the protocols supported by Bluetooth for mobile phones. What we need to care about is a file transfer service called OBEX Object Push. Take the HTC6525LVW mobile phone as an example. The results are as follows:
Service Name: OBEX Object Push Service RecHandle: 0x1000b Service Class ID List: "OBEX Object Push" (0x1105) Protocol Descriptor List: "L2CAP" (0x0100) "RFCOMM" (0x0003) Channel: 12 "OBEX" (0x0008) Profile Descriptor List: "OBEX Object Push" (0x1105) Version: 0x0100
As can be seen from the above information, the channel used by the OBEX Object Push service of this mobile phone is 12, we need to pass it to the obexftp command, and finally the command to initiate the file transfer request is as follows:
obexftp --nopath --noconn --uuid none --bluetooth -b 2C:8A:72:1D:46:02 -B 12 -put example.jpg
Note: Please replace the MAC address, channel and file name in the above command with the actual one.
After executing the above commands, please pay attention to the screen of the mobile phone. The mobile phone will pop up a prompt for pairing and receiving files. After confirming, the file transfer will start.
Bluetooth FAQ:
1) Bluetooth device not found on the development board, try to open Bluetooth with the following command:
rfkill unblock 0
2) Prompt can not find the relevant command, you can try to install related software with the following command:
apt-get install bluetooth bluez obexftp openobex-apps python-gobject ussp-push
5.8 WiFi
For either an SD WiFi or a USB WiFi you can connect it to your board in the same way. The APXX series WiFi chips are SD WiFi chips. By default FriendlyElec's system supports most popular USB WiFi modules. Here is a list of the USB WiFi modules we tested:
Index Model 1 RTL8188CUS/8188EU 802.11n WLAN Adapter 2 RT2070 Wireless Adapter 3 RT2870/RT3070 Wireless Adapter 4 RTL8192CU Wireless Adapter 5 mi WiFi mt7601 6 5G USB WiFi RTL8821CU 7 5G USB WiFi RTL8812AU
You can use the NetworkManager utility to manage network. You can run "nmcli" in the commandline utility to start it. Here are the commands to start a WiFi connection:
- Change to root
$ su root
- Check device list
$ nmcli dev
Note: if the status of a device is "unmanaged" it means that device cannot be accessed by NetworkManager. To make it accessed you need to clear the settings under "/etc/network/interfaces" and reboot your system.
- Start WiFi
$ nmcli r wifi on
- Scan Surrounding WiFi Sources
$ nmcli dev wifi
- Connect to a WiFi Source
$ nmcli dev wifi connect "SSID" password "PASSWORD" ifname wlan0
The "SSID" and "PASSWORD" need to be replaced with your actual SSID and password.If you have multiple WiFi devices you need to specify the one you want to connect to a WiFi source with iface
If a connection succeeds it will be automatically setup on next system reboot.
For more details about NetworkManager refer to this link: Use NetworkManager to configure network settings
If your USB WiFi module doesn't work most likely your system doesn't have its driver. For a Debian system you can get a driver from Debian-WiFi and install it on your system. For a Ubuntu system you can install a driver by running the following commands:
$ apt-get install linux-firmware
In general all WiFi drivers are located at the "/lib/firmware" directory.
5.9 Ethernet Connection
If a board is connected to a network via Ethernet before it is powered on it will automatically obtain an IP with DHCP activated after it is powered up. If you want to set up a static IP refer to: Use NetworkManager to configure network settings。
5.10 Custom welcome message
The welcome message is printed from the script in this directory:
/etc/update-motd.d/
For example, to change the FriendlyELEC LOGO, you can change the file /etc/update-motd.d/10-header. For example, to change the LOGO to HELLO, you can change the following line:
TERM=linux toilet -f standard -F metal $BOARD_VENDOR
To:
TERM=linux toilet -f standard -F metal HELLO
5.11 Modify timezone
For exampe, change to Shanghai timezone:
sudo rm /etc/localtime sudo ln -ls /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
5.12 Set Audio Device
If your system has multiple audio devices such as HDMI-Audio, 3.5mm audio jack and I2S-Codec you can set system's default audio device by running the following commands.
- After your board is booted run the following commands to install alsa packages:
$ apt-get update $ apt-get install libasound2 $ apt-get install alsa-base $ apt-get install alsa-utils
- After installation is done you can list all the audio devices by running the following command. Here is a similar list you may see after you run the command:
$ aplay -l card 0: HDMI card 1: 3.5mm codec card 2: I2S codec
"card 0" is HDMI-Audio, "card 1" is 3.5mm audio jack and "card 2" is I2S-Codec. You can set default audio device to HDMI-Audio by changing the "/etc/asound.conf" file as follows:
pcm.!default { type hw card 0 device 0 } ctl.!default { type hw card 0 }
If you change "card 0" to "card 1" the 3.5mm audio jack will be set to the default device.
Copy a .wav file to your board and test it by running the following command:
$ aplay /root/Music/test.wav
You will hear sounds from system's default audio device.
If you are using H3/H5/H2+ series board with mainline kernel, the easier way is using npi-config。
5.13 Run Qt 5.10.0 Demo with GPU acceleration
Run the following command
$ sudo qt5demo
5.14 Run Qt 5.10.0 Demo with OpenGL
Run the following command
. setqt5env cd $QTDIR cd /examples/opengl/qopenglwidget ./qopenglwidget
For more Qt 5.10.0 examples, please go to:
cd $QTDIR/examples/
5.15 Play HD Video with Hardware-decoding
gst-player is console player, it base on GStreamer, support VPU with Hardware-decoding:
sudo gst-player /home/pi/demo.mp4
The equivalent gsteamer command is as follows:
sudo gst-launch-1.0 filesrc location=/home/pi/demo.mp4 ! qtdemux name=demux demux. ! queue ! faad ! audioconvert ! audioresample ! alsasink device="hw:0,DEV=1" demux. ! queue ! h264parse ! nxvideodec ! nxvideosink dst-x=0 dst-y=93 dst-w=1280 dst-h=533
5.16 Connect to DVP Camera CAM500B
The CAM500B camera module is a 5M-pixel camera with DVP interface. For more tech details about it you can refer to Matrix - CAM500B.
Enter the following command to preview the video:
gst-launch-1.0 -e v4l2src device=/dev/video6 ! video/x-raw,format=I420,framerate=30/1,width=1280,height=720 ! nxvideosink
Enter the following command to start recording (VPU hardware encoding):
gst-launch-1.0 -e v4l2src device=/dev/video6 ! video/x-raw,format=I420,framerate=30/1,width=1280,height=720 ! tee name=t t. \ ! queue ! nxvideosink t. ! queue ! nxvideoenc bitrate=12000000 ! mp4mux ! \ filesink location=result_720.mp4
5.17 Power Off and Schedule Power On
“PMU Power Management” feature helps us to auto power on the board at a specific time, it is implemented by an MCU, support software power-off, and RTC alarm power-up functions.
Here’s a simple guide:
Turn on automatically after 100 seconds. (Time must be greater than 60 seconds.):
$ sudo echo 100 > /sys/class/i2c-dev/i2c-3/device/3-002d/wakealarm
After setting up the automatic boot, turn off board with the 'poweroff’ command:
$ sudo poweroff
Cancel automatic boot:
$ sudo echo 0 > /sys/class/i2c-dev/i2c-3/device/3-002d/wakealarm
Query the current settings, in the front is current time, followed by the time of automatic booting: If no automatic boot is set, it will display "disabled”.
$ sudo cat /sys/class/i2c-dev/i2c-3/device/3-002d/wakealarm
Note that some older versions of hardware may not support this feature, if you don't see this file node in your system:
/sys/class/i2c-dev/i2c-3/device/3-002d/wakealarm
your board may be it does not support this feature.
5.18 Installing and Using OpenCV 4.1.2
OpenCV has been pre-installed in FriendlyCore (Version after 20191126) and does not require manual installation.
Please refre this link: https://github.com/friendlyarm/install-opencv-on-friendlycore/blob/s5pxx18/README.md
Quick test:
. /usr/bin/cv-env.sh . /usr/bin/setqt5env-eglfs cd /usr/local/share/opencv4/samples/python python3 turing.py
5.19 Installing and Using Caffe
git clone https://github.com/friendlyarm/install-caffe-on-friendlycore cd install-caffe-on-friendlycore sudo ./install-caffe.sh
6 Update Log
6.1 2023-01-09
6.1.1 FriendlyCore:
- optimized the systemd service
6.2 2020-10-26
- FriendlyCore, Lubuntu:
Fix Bluetooth stability issue
6.3 2019-12-28
- eflasher:
1) Supports flashing only some files, such as updating only the kernel and uboot in emmc
2) Added gui option to disable overlay filesystem
3) Add command line parameters to achieve one-click installation without interaction
4) Fix the issue that the same mac address will appear on different devices after backup and restore image
5) UI interface can now be configured with title, hide interface menus and buttons
6.4 2019-11-26
- FriendlyCore:
Pre-installed OpenCV 4.1.2
6.5 2019-11-14
- Introducing a new system FriendlyWrt:
FriendlyWrt is a customized OpenWrt system developed by FriendlyElec. It is open source and suitable for applications in IoT, NAS etc.
Please refre: http://wiki.friendlyelec.com/wiki/index.php/How_to_Build_FriendlyWrt
- FriendlyCore, Lubuntu updated as follows:
1) Added support for new 4.3-inch screen YZ43
2) Compile bcmdhd as a module.
- Android7 update is as follows:
1) Added support for new 4.3-inch screen YZ43
2) Optimize the touch experience when using HD900 screen under Android 7 system
3) Optimize the touch experience when using S702 screen under Android 7 system
6.6 2019-10-18
- Android7, FriendlyCore, Lubuntu:
Fixed audio playback issue.
6.7 2019-09-30
- Android7 updated as follows:
1)Added support for Android hardware access library (named FriendlyThing), support access to hardware resources such as GPIO, PWM, RTC, serial port and watchdog, providing open source demo
2) Added support for camera CAM500B (OV5640)
3) Added support for LCD W500 (800x480)
4) Fixed LCD-S430 compatibility issues
- FriendlyCore, FriendlyDesktop updated as follows:
1) Kernel version updated to v4.4.172, same as Android 7
2) Added Docker support, support 32bit and 64bit file systems
3) Kernel configuration items are optimized to enable more features and device drivers
6.8 2019-07-18
- Introducing a new system Android 7.1.2
1) Features similar to the old version of Android 5, support 4G, WiFi, Ethernet, Bluetooth, etc.
2) Kernel version: 4.4.172
3) Known issue: The camera is not working yet
- Android/FriendlyCore/Lubuntu updated as follows:
1) Fix an issue where HD101B can't be touched in some cases
2) Fix GPIO configuration of Power key
3) Solve the problem of too small volume: the volume of the DAC is changed from -20dB to -6dB during playback.
4) Add more models of USB Wi-Fi support, built-in driver rtl8821CU.ko, rtl88XXau.ko
- Updates for Lubuntu only:
1) Modify Lubuntu's Power key behavior to (without pop-ups) shut down directly
2) Add script xrotate.sh to simplify screen rotation settings (Note: screen rotation will lose performance)
- The following updates are only available for NanoPC T2, Smart4418:
Support for reading Ethernet Mac addresses from the onboard EEPROM, only supports the following systems: FriendlyCore, Lubuntu, Android7
6.9 2019-06-25
Linux(Ubuntu 16.04/18.04) uses OverlayFS to enhance filesystem stability.
6.10 2019-06-03
1) Configure LED1 to be in heartbeat mode
2) Fix HDMI 1080P may have no display problem in some cases
3) Fix the issue that mysql cannot be installed under Linux
4) Fix the issue that the 1-wire touch resistance screen cannot be used under lubuntu
6.11 2019-01-24
1) Update uboot-v2014.07, uboot-v2016.01 for HD702V LCD
2) Adjust Qt5 font path
6.12 2018-12-17
- Android5 updated as follows:
1) Add support for 4G network, support module: Quectel EC20
2) Add audio setting UI, you can set the default output to headphones or HDMI
3) Synchronously turn off the backlight of the one-line touch screen when the system Shutdown
- FriendlyCore updated as follows:
1) Add OV5640 camera support
2) Update BL1 to improve system startup stability
- Lubuntu updated as follows:
1) Add Chrome-browser browser, support web page 1080P hardware decoding, support WebGL
2) Set the audio output channel to HDMI by default (can be changed via /etc/asound.conf)
3) Update BL1 to improve system startup stability
4) Fixed some issues regarding the package error in the previous version
5) Adjust DPMS settings, turn off automatic sleep by default
6.13 March-04-2016
- Released English version
6.14 March-09-2016
- Corrected a typo
6.15 March-23-2016
- Added section 11
6.16 March-27-2016
- Corrected expression errors
6.17 April-08-2016
- Added section 6.4.2 and 7.4
- Updated section 6.5
6.18 June-30-2016
- Added section 9 and 10
6.19 Sep-04-2016
- Updated section 5.2.2 and 10.1.1
6.20 Sep-27-2016
- Updated section 5.2.2, 7.5 and 8.2
6.21 Nov-2-2016
- Updated section 6.2, 6.3, 6.4 and 12
6.22 Nov-17-2016
- Added section 10.6
6.23 Dec-7-2016
- Added section 6.6
- Updated section 7.5
6.24 June-13-2016
- Added section 7: added UbuntuCore
- Added section 11.3: added DietPi
6.25 June-20-2016
- Updated sections 6.2 & 6.3: Wireless connection and WiFi AP setting
- Added section 3: software features