혼자서가라

어쩌면 아래 이슈는 노트북의 USB 포트로 RPi 전원공급을 해서 발생한 문제일 수도 있겠다.

[ 2277.672282] Voltage normalised (0x00000000)

[ 2285.992401] Under-voltage detected! (0x00050005)

[ 2292.232369] Voltage normalised (0x00000000)

[ 2342.152389] Under-voltage detected! (0x00050005)

[ 2350.472387] Voltage normalised (0x00000000)

[16:50:27] root@openHABianPi:/sys/class/leds/led1#

문제는 RPi 에 인터넷 연결을 해주고 싶었다. 

Notebook 의 WiFi 를 도서관 AP 에 연결해서 인터넷을 사용하는중에 

LAN 포트를 RPi 와 연결해서 유선으로 RPi 에서 인터넷 서비스를 하고 싶었다 <--- 이게 원래 계획이었음.

아무리 노트북 설정을 수정해도 결국 성공하지 못해서 계획 변경 ㅠㅠ

RPi 에 Realtek WiFi Adapter(USB Dongle type) 을 연결해서 도서관 AP 에 직접 접속 시도.

아래의 상황처럼 아무리 접속을 시도해서 안됨. 

[16:31:31] root@openHABianPi:/home/openhabian# iwconfig wlan0

wlan0     unassociated  Nickname:"<WIFI@REALTEK>"

          Mode:Managed  Frequency=2.432 GHz  Access Point: Not-Associated

          Sensitivity:0/0

          Retry:off   RTS thr:off   Fragment thr:off

          Encryption key:off

          Power Management:off

          Link Quality:0  Signal level:0  Noise level:0

          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0

          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

[16:32:22] root@openHABianPi:/home/openhabian#

아래 부분을 수정해도 안됨. 

 This will work if you add these lines to the /etc/network/interfaces file:

# interfaces(5) file used by ifup(8) and ifdown(8)

# Please note that this file is written to be used with dhcpcd
# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'

# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d

auto wlan0
allow-hotplug wlan0
iface wlan0 inet manual
  wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

reference site

https://www.openhab.org/docs/installation/openhabian.html

Setup:

• Download the latest "openHABianPi" SD card image file (Note: the file is xz compressed)

• Write the image to your SD card (e.g. with Etcher, able to directly work with xz files)

• Insert the SD card into the Raspberry Pi, connect Ethernet (Wi-Fi supported) and power

• Wait approximately 15-45 minutes for openHABian to do its magic

• Enjoy! 🎉

• The device will be available under its IP or via the local DNS name openhabianpi

• Connect to the openHAB 2 dashboard: http://openhabianpi:8080

• Connect to the Samba network shares with username openhabian and password openhabian

• Connect to the openHAB Log Viewer (frontail): http://openhabianpi:9001

• If you encounter any setup problem, please continue here

You can stop reading now. openHABian has installed and configured your openHAB system and you can start to use it right away. If you want to get in touch with the system or want to install one of the previously mentioned optional features, you can come back here later.

Ready for more? Connect to your Raspberry Pi SSH console using the username openhabian and password openhabian. You will see the following welcome screen:

How to install Virtualbox in Ubuntu

1. sudo apt-get install build-essential

sudo apt-get install dkms

sudo apt-get install linux-headers-generic

2. get Virtual box

wget http://download.virtualbox.org/virtualbox/5.1.8/virtualbox-5.1_5.1.8-111374~Ubuntu~trusty_i386.deb