Raspbian enable SSH when creating SD card

$ sudo mount /dev/mmcblk0p1 /mnt/
$ cd /mnt
$ sudo touch SSH
$ sudo umount /mnt

Reduce Raspberry Pi Zero power consumption

# vi /etc/rc.local

# Disable HDMI
/usr/bin/tvservice -o

# Disable LEDs
echo none > /sys/class/leds/led0/trigger
echo 1 > /sys/class/leds/led0/brightness

References :
Raspberry Pi Zero - Conserve power and reduce draw to 80mA
Controlling PWR and ACT LEDs on the Raspberry Pi

org.bluez.Error.Failed

# rfkill unblock bluetooth
# hciconfig hci0 up

References :
蓝牙设备上电提示Failed to set power on: org.bluez.Error.Blocked - pengrui18的专栏 - CSDN博客

pygattlib on Raspberry Pi

pkg-config
libboost-python-dev
libboost-thread-dev
libbluetooth-dev >= 4.101
libglib2.0-dev
python-dev

References :
mbientlab/pygattlib
筆記, 抓取小米花花草草監測儀的數據資料 (Mi Flora, Bluetooth Low Energy) - 大兵萊恩 一路直前

Turning off usb

power off

# echo "1-4.4.4" > /sys/bus/usb/drivers/usb/unbind

power on

# echo "1-4.4.4" > /sys/bus/usb/drivers/usb/bind

References :
Controlling a USB power supply (on/off) with linux - Stack Overflow 

Linux disabling blank screen

$ xset s off
$ xset -dpms
$ xset s noblank

References :
How to Disable the Blank Screen on Raspberry Pi (Raspbian) | HackLab

Raspberry Pi DS3231 RTC clock

# vi /boot/config

dtparam=i2c_arm=on

# modprobe i2c-bcm2708
# echo ds3231 0x68 | sudo tee /sys/class/i2c-adapter/i2c-1/new_device

# vi /etc/rc.local

echo ds3231 0x68 > /sys/class/i2c-adapter/i2c-1/new_device
hwclock -s

References :
DS3231 RTC 高精度時鐘模組 適用 Raspberry Pi 樹莓派全系列開發板 - 台灣物聯科技 TaiwanIOT Studio
Linux學習筆記: raspberry pi 安裝 DS3231 RTC時鐘模組
Configuring I2C | Adafruit's Raspberry Pi Lesson 4. GPIO Setup | Adafruit Learning System

Raspberry Pi Wifi Adapter

# vi /etc/network/interfaces

auto wlan0
iface wlan0 inet dhcp
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

# ifup wlan0

References :
Edimax EW-7811UN Wifi dongle on Raspbian
Gentoo Forums :: 觀看文章 - [Solved] WPA_Supplicant issues

build Debian image for Raspberry Pi

References :
build your own Raspberry Pi SD card (original post from http://blog.kmp.or.at/2012/05/build-your-own-raspberry-pi-image/)

Pd-extended on Raspberry Pi

# vi /etc/apt/sources.list

deb-src http://archive.raspbian.org/raspbian wheezy main contrib non-free rpi

$ wget https://puredata.info/downloads/pd-extended-0-43-3-on-raspberry-pi-raspbian-wheezy-armhf/releases/1.0/Pd-0.43.3-extended-20121004.deb
$ sudo dpkg -i Pd-0.43.3-extended-20121004.deb

$ sudo apt-get update
$ sudo apt-get -f install

References :
Pd-extended 0.43.3 on Raspberry Pi (Raspbian Wheezy) - armhf — PD Community Site

Raspbian 預設帳號密碼

Username: pi
Password: raspberry




Reference :
Raspberry Pi Beginners Guide - neil-black.co.uk