Magic Mirror

Introduction

I'm assembling two magic mirrors for me and my girlfriend. Based on this video tutorial: https://www.youtube.com/watch?v=fkVBAcvbrjU.

However with a slight twist. I'm also installing a webcam and microphone so we can use both mirrors for video conferences.

And finally I'm going to add voice control support using google assistant.

Hardware

see-through foil which is put on a petg holder
Benq Monitor 20" Monitor
Raspberry PI 3 Model B V1.2
16BG Micro SD
HDMI Cable
Webcam
Soundcard
USB Microphone

Software

Rasberian
nodejs

Things to do on new OS installation

update

sudo apt-get update

change user and remove default user http://raspi.tv/2012/how-to-create-a-new-user-on-raspberry-pi

sudo adduser username

sudo visudo

john ALL=(ALL) ALL

logout

login

sudo deluser pi

sudo deluser -remove-home pi

add ssh access https://www.raspberrypi.org/documentation/remote-access/ssh/passwordless.md

ssh-keygen -t rsa -C user@host

then enable ssh on start using

raspi-config configuration

it can also be started and stopped using

sudo service ssh start and sudo service ssh stop

check status with

sudo service ssh status

check open ssh sessions

who -a

kill ssh dameon

sudo pkill -9 sshd

linux brew http://linuxbrew.sh/

see available space left

df -BM

monitoring http://elinux.org/RPi-Monitor

install https://rpi-experiences.blogspot.de/p/rpi-monitor-installation.html

To use this repository follow the instruction bellow:

Execute the following command to add RPi-Monitor into your list of repository:

sudo wget http://goo.gl/vewCLL -O /etc/apt/sources.list.d/rpimonitor.list

Install my public key to trust RPi-Monitor repository:

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 2C0D3C0F

To install RPi-Monitor, execute the following command:

sudo apt-get update
sudo apt-get install rpimonitor

To upgrade RPi-Monitor, execute the following command:

sudo apt-get update
sudo apt-get upgrade

After installation you should excute the following command to update information about upgradable packages:

sudo /etc/init.d/rpimonitor update

access monitor with http://ip:8888

share folder with mac http://www.instructables.com/id/How-to-share-files-between-Mac-OSX-and-Raspberry-P/

sudo apt-get install netatalk

share folder with win http://raspberrypihq.com/how-to-share-a-folder-with-a-windows-computer-from-a-raspberry-pi/

install samba

sudo apt-get install samba samba-common-bin

add win support to config

sudo nano /etc/samba/smb.conf

workgroup = WORKGROUP
wins support = yes

and edit path

[PiShare]
comment=Raspberry Pi Share
path=/home/pi/share
browseable=Yes
writeable=Yes
only guest=no
create mask=0777
directory mask=0777
public=no

enable user as network user

sudo smbpasswd -a pi

restart samba
```
sudo /etc/init.d/samba restart
```

install google drive https://github.com/prasmussen/gdrive also see https://github.com/pageauc/pi-timolo/wiki/Instructions-to-Re-Purpose-sync.sh

 sudo crontabs -e

 * * * * * su pi -c "/usr/local/bin/gdrive pull -no-prompt -ignore-conflict -ignore-name-clashes /home/pi/googledrive > /dev/null"
 * * * * * su pi -c "/usr/local/bin/gdrive push -no-prompt -ignore-conflict -ignore-name-clashes /home/pi/googledrive > /dev/null"

applying bashrc

source ~/.bashrc

Camera

raspstill -o image.jpg

raspivid -o vid.h264 -t 10000

if webcam doesn't show up in chrome

# sudo modprobe bcm2835-v4l2Sent on:12:51 pm
sudo modprobe bcm2835-v4l2 gst_v4l2src_is_broken=1

Audio

HDMI Monitor Speaker worked for me out of the box as well as my JBL Bluetooth

Speaker test

speaker-test -f 440 -t sine

/usr/bin/chromium-browser --display=:0 https://web.skype.com

Microphone

aplay -l

record sample, note: i changed plughw:0,0 to 1. first colum: card number, 2nd column device number

arecord --device=plughw:1,0 --format S16_LE --rate 44100 -c1 test.wav

change default record but keep hdmi audio https://raspberrypi.stackexchange.com/a/39942

aplay -l

it prints the following as result, where the 2nd device is the usb micro

**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

now we set the default micro by editing https://raspberrypi.stackexchange.com/a/63101

create ~/.asoundrc

pcm.!default {
    type asym
    playback.pcm "plughw:0"
    capture.pcm  "plughw:1"
}

https://raspberrypi.stackexchange.com/a/44126

arecord --device=plughw:0,0 --format S16_LE --rate 44100 -c1 test.wav
aplay --device=plughw:0,0 test.wav

google assistant https://www.youtube.com/watch?v=tt-gOQSYbcQ / https://www.novaspirit.com/2017/05/02/google-assistant-raspberry-pi/

github: https://github.com/googlesamples/assistant-sdk-python/tree/master/google-assistant-sdk

google assistant sdk documentation https://developers.google.com/assistant/sdk/prototype/getting-started-pi-python/run-sample

enable api and get credentials json for google assistant https://console.cloud.google.com/

sudo apt-get install python3-dev python3-venv
sudo apt-get install portaudio19-dev libffi-dev libssl-dev
python3 -m venv env
env/bin/pip install pip setuptools --upgrade

source env/bin/activate
python -m pip install google-assistant-sdk[samples]
pip install --upgrade google-auth-oauthlib[tool]
google-oauthlib-tool --client-secrets /home/pi/ga/client_secret_magicmirrorone.apps.googleusercontent.com.json --scope https://www.googleapis.com/auth/assistant-sdk-prototype --save --headless

http://www.instructables.com/id/WhatsApp-on-Raspberry-Pi/

Installation

Noobs (Currently 2.4.0)
SD Formatter 4.0

voice activation using google-assistent

https://www.youtube.com/watch?v=EfUpOpXDdLk&t=0s

some use cases:

noir https://www.youtube.com/watch?v=lP-QQGxm2Y0&feature=youtu.be&t=1m35s

port forwarding using windows https://stackoverflow.com/a/11535395

adding

netsh interface portproxy add v4tov4 listenport=4422 listenaddress=192.168.1.111 connectport=80 connectaddress=192.168.0.33

and removal

netsh interface portproxy delete v4tov4 listenport=4422 listenaddress=192.168.1.111

rotate screen

sudo nano /boot/config.txt


change values based on following:
display_rotate=0 Normal
display_rotate=1 90 degrees
display_rotate=2 180 degrees
NOTE: You can rotate both the image and touch interface 180º by entering lcd_rotate=2 instead
display_rotate=3 270 degrees
display_rotate=0x10000 horizontal flip
display_rotate=0x20000 vertical flip

https://github.com/MichMich/MagicMirror

Run DISPLAY=:0 npm start from the ~/MagicMirror directory to start your MagicMirror.

cd ~/MagicMirror
DISPLAY=:0 npm start

Start and Daemonize any application:
$ pm2 start app.js

Load Balance 4 instances of api.js:
$ pm2 start api.js -i 4

Monitor in production:
$ pm2 monitor

Make pm2 auto-boot at server restart:
$ pm2 startup

To go further checkout:
http://pm2.io/

kibotu/GUIDE.md