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pi_setup.md

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INSTALL RASPBIAN

2018-10-09-raspbian-stretch

RASPBIAN CONFIGURATION

$ sudo raspi-config
  1. update to latest version
  2. network options
  • set hostname to 'pi'
  • add wifi
  1. interface options

  • enable SSH force audio to 3.5mm 3 boot options

  • disbale graphic

    $ sudo apt-get update

ENABLE SSH KEY AUTH

$ ssh pi@pi (enter password)

create ~/.ssh/authorized_keys if required

(i had no permissions issues on my key file)

$ mkdir ~/.ssh
$ touch authorized_keys

add chosen public key to authorized keys

$ echo $PUB_KEY >> ~/.ssh/authorized_keys

Disable password auth, enable key auth.

$ sudo nano /etc/ssh/sshd_config

# PasswordAuthentication no
# PubkeyAuthentication yes

Restart the ssh service

$ sudo service ssh restart

Double check key is added to ssh-agent... Test ssh.

ssh pi@pi

ADD PACKAGES

  1. byobu pi@pi:~ $ sudo apt-get install byobu

BLUETOOTH

DESKTOP ONLY!

  1. Remove remove the existing bluetooth lxpanel plugin $ sudo apt-get remove lxplug-bluetooth

  2. Install advanced bluetooth GUI plugin $ sudo apt-get install blueman

BLUETOOTH CONFIG

  1. disable inbuilt bluetooth controller

$ sudo bluetoothctl

[bluetooth]# list Controller B8:27:EB:E2:79:E7 pi #2 Controller 00:1A:7D:DA:71:13 pi [default] [bluetooth]# select B8:27:EB:E2:79:E7 Controller B8:27:EB:E2:79:E7 pi #2 [default] [bluetooth]# power off

  1. set alias for onboard bluetooth to make it easier.... i did this via bluetooth panel

BLUEZ

i had it installed, but get v5.0+ $ sudo apt-get install bluez

PULSE AUDIO

get the pulseaudio plugins

DESKTOP ONLY! $ sudo apt-get install pavucontrol

Pulse Audio Bluez Plugin (I didn't have Pulse Audio on Raspbian Lite) $ sudo apt-get install pulseaudio-module-bluetooth

HEADLESS

$ sudo nano /boot/config.txt

dtoverlay=pi3-disable-bt

$ sudo systemctl disable hciuart'

TEST

$ sudo bluetoothctl

[bluetooth]# select B8:27:EB:E2:79:E7

[bluetooth]# agent on
Agent registered

[bluetooth]# default-agent
Default agent request successful

[bluetooth]# discoverable on
Changing discoverable on succeeded
[CHG] Controller B8:27:EB:E2:79:E7 Discoverable: yes

[NEW] Device E0:F5:C6:07:55:B3 Piers's iPad
[CHG] Device E0:F5:C6:07:55:B3 Connected: no
[DEL] Device E0:F5:C6:07:55:B3 Piers's iPad
[NEW] Device E0:F5:C6:07:55:B3 Piers's iPad

Request confirmation
[agent] Confirm passkey 630333 (yes/no): yes

[Piers's iPad]# trust
[CHG] Device E0:F5:C6:07:55:B3 Trusted: yes
Changing  trust succeeded

[Piers's iPad]#

okay, pairing good... but no audio servie i'm rebooting as unsure if modules good yep, how we're good!

Ruby

rbenv $ sudo apt-get install rbenv

rbenv plugin: ruby-build $ sudo apt-get install ruby-build

that worked i should note.. rbenv was v1.0.0 and ruby-build had MRI latest of... 2.4.0! :O i think debian 10 is around the corner...

install ruby $ rbenv install 2.4.0

worked

don't forget setting up rbenv with shell

$ rbenv init
$ echo 'eval "$(rbenv init -)"' >> ~/.bashrc
$ source ~/.bashrc

check ruby version is good

$ which ruby
/home/pi/.rbenv/shims/ruby

$ ruby -v
ruby 2.4.0p0 (2016-12-24 revision 57164) [armv7l-linux-eabihf]

get bundler

$ gem install bundler

Ruby ZeroMQ

Okay, despite all that, the rbzmc gem will encounter an extention install failure

$ cd ~/Wolfgang
$ gem instll rbczmq

We're going to need to download, and modify the gem extention build scripts to get the win.

To begin, there are multiple build dependencies...

$ sudo apt-get libtool

# https://github.com/methodmissing/rbczmq/issues/36
$ sudo apt-get install autogen

# https://askubuntu.com/questions/625523/libtool-installed-but-not-on-path-after-installation
$ sudo apt-get install libtool-bin

$ sudo apt-get install autoconf automake

# Cut to the chase
$ sudo apt-get install libtool libtool-bin autogen automake

Edit the gem source

$ gem env | grep -i 'INSTALLATION DIRECTORY'
- INSTALLATION DIRECTORY: /home/pi/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0

$ cd /home/pi/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0

$ gem fetch rbczmq
Fetching: rbczmq-1.7.9.gem (100%)
Downloaded rbczmq-1.7.9

$ gem unpack rbczmq-1.7.9.gem
Unpacked gem: '/home/pi/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/rbczmq-1.7.9'

$ cd rbczmq-1.7.9

Look for the build flags...

$ grep -r -n '\-Wall *                                                                                             
ext/zeromq/CMakeLists.txt:101......

Edit the build files to remove error flags

$ nano ext/rbczmq/extconf.rb
$ nano ext/czmq/configure.ac
$ nano ext/czmq/Makefile
$ nano ext/czmq/src/Makefile

Build gem from source

First we'll need rake-compiler

$ gem install rake-compiler

Generate the MakeFile. This will take a while, and will pump out feedback..

$ ruby ext/rbczmq/extconf.rb

Compile

make ext/rbczmq/Makefile

Generate the gem specification. https://guides.rubygems.org/command-reference/#gem-install

# From unpacked gem root:
$ gem spec ../../cache/rbczmq-1.7.9.gem > ../../specifications/rbczmq-1.7.9.gemspec

build will fail

edit GEM_PATH/ext/rbczmq/extconf.rb remove -Wall, and -Wextra to avoid deprecation warnings

you need to compile locally as gem install will downloa and re-unpack the soruce gem install make-compiler cd GEM_ROOT $ rake

fuck.... that shit is all over the place i'm just: $ grep '-W' * and deleting everything i can find

In the end i...

  • fetched and unpacked the gem.
  • manually built and installed libzmq and czmq
  • added /usr/local/lib to ldconfig
  • verified libraries via pry and mkmf#have_library
  • gem install rbczmq = win

useful commands:

sudo service bluetooth status|stop sudo bluetoothctl

$ alias ll="ls -lah"