Pixie

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---
title: Pixie
---

Implements
:   [Automation Hub][1]

Hostname
:   pixie0

Make
:   Raspberry Pi 2

Model
:   B+

Software
:   Debian Jessie, [Home Assistant][2]

Purchased
:   2015-05-14 £42 (kit) from CPC

Delivered
:   2015-05-15

[[_TOC_]]

# Static ttyUSB for zwave and rfxcom

Aeonlabs Z-Stick S2 is `/dev/ttyUSB21`, Rfxcom is `/dev/ttyUSB22`

`/etc/udev/rules.d/99-usb-serial.rules`:

SUBSYSTEM=="tty", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", ATTRS{serial}=="0001", SYMLINK+="ttyUSB21"
    SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{serial}=="A1XHAXCI", SYMLINK+="ttyUSB22"

# RTC

<https://raw.githubusercontent.com/piface/PiFace-Real-Time-Clock/master/install-piface-real-time-clock.sh>

*   Enable I2C 
*   `apt-get install i2c-tools`

# Home-Assistant mysql Database

CREATE DATABASE hass;
    GRANT ALL PRIVILEGES ON hass.* TO 'hass'@'%' WITH GRANT OPTION;
    FLUSH PRIVILEGES;

## Fix Host Blocked error

<https://dev.mysql.com/doc/refman/5.7/en/blocked-host.html>

mysql> SET GLOBAL max\_connect\_errors=10000;
    mysql> flush hosts;

# OpenZWave

## Upgrading

sudo su hass
    . /srv/hass/hass_venv/bin/activate
    cd /srv/hass/src/python-openzwave
    git pull origin
    cd openzwave
    git pull origin
    cd ..
    make build
    make install

## Upgrading via python-openzwave

Using openzwave dev branch from github:

. /srv/hass/hass_venv/bin/activate
    pip install python_openzwave --install-option="--flavor=dev" --no-deps --ignore-installed --no-cache-dir

# [LetsEncrypt][29]

Certbot is now installed as a package.

## Renewing

1.  Leave nginx running 
2.  Allow iptables 80 tcp input 
3.  Enable 80 port forward on router to pixie3

```
    uci show firewall.@redirect[1].name  # confirm the key
    uci set firewall.@redirect[1].enabled=1
    uci changes
    uci commit firewall
    reload_config
    ```

4.  Run `sudo certbot renew --nginx` 
5.  Check cert `openssl x509 -text -in /etc/letsencrypt/live/ha.home.whalebarn.com/cert.pem` 
6.  Disallow iptables 80 and disable 80 port forward
    ```
    uci show firewall.@redirect[1].name  # confirm the key
    uci set firewall.@redirect[1].enabled=0
    uci changes
    uci commit firewall
    reload_config
    ```

7.  Restart nginx

## Renewing from Git (Obsolete)

As above except:

1.  Run `sudo ~pi/src/letsencrypt/certbot-auto renew --nginx` 
2.  Check cert `openssl x509 -text -in /etc/letsencrypt/live/ha.home.whalebarn.com/cert.pem`

# Fix nginx startup

## Missing `/var/log/nginx`

Fails to start after boot because `/var/log/nginx` hasn't been created

Add to

`/etc/systemd/system/multi-user.target.wants/nginx.service` 
    ExecStartPre=/bin/bash -c 'mkdir -p /var/log/nginx; /usr/sbin/nginx -t -q -g "daemon on; master_process on;"'
     to create the log dir and run nginx config test

New solution. Copy and customize `nginx.service`:

[Unit]
    Description=A high performance web server and a reverse proxy server
    After=network.target
    
    [Service]
    Type=forking
    PIDFile=/run/nginx.pid
    PermissionsStartOnly=true  # do the mkdir as root
    ExecStartPre=-/bin/mkdir -p /var/log/nginx   # create log dir, tolerate failure
    ExecStartPre=/usr/sbin/nginx -t -q -g 'daemon on; master_process on;'
    ExecStart=/usr/sbin/nginx -g 'daemon on; master_process on;'
    ExecReload=/usr/sbin/nginx -g 'daemon on; master_process on;' -s reload
    ExecStop=-/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid
    TimeoutStopSec=5
    KillMode=mixed
    
    [Install]
    WantedBy=multi-user.target

## Can't connect to Upstream

Make nginx depend on home-assistant startup.

sudo mkdir -p /etc/systemd/system/nginx.service.d
    sudo vim /etc/systemd/system/nginx.service.d/override.conf

Create `/etc/systemd/system/nginx.service.d/override.conf`:

[Unit]
    Wants=home-assistant.service
    After=home-assistant.service

# Python with PyEnv

Manage python version upgrades with pyenv.

<http://www.knight-of-pi.org/pyenv-for-python-version-management-on-raspbian-stretch/>

sudo apt-get install bzip2 libbz2-dev libreadline6 libreadline6-dev libffi-dev libssl1.0-dev sqlite3 libsqlite3-dev -y
    git clone git://github.com/yyuu/pyenv.git .pyenv
    echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
    echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
    echo 'eval "$(pyenv init -)"' >> ~/.bashrc
    . ~/.bashrc

System-wide install of 3.8.5:

mkdir tmp
    sudo su  # otherwise TMPDIR doesn't affect the pyenv subshell...
    TMPDIR=`pwd`/tmp .pyenv/plugins/python-build/bin/python-build 3.8.5 /usr/local/python-3.8.5/

# Zwave2Mqtt

Chose this over ozwdaemon (which requires a custom build of QT 5.12!)

## Build openzwave

Version 1.6+. User `pi`

mkdir -p src/open-zwave
    git clone https://github.com/OpenZWave/open-zwave.git
    # tag v1.6 failed with gcc 6.3
    git checkout -b live master
    make
    sudo make install

## Install node and npm

User `hass`

sudo apt-get install npm
    # npm config set registry https://registry.npmjs.org  # unnecessary?
    # https://github.com/nebrius/raspi-serial/issues/8
    sudo npm install -g npm  # upgraded to 6.14.8, old /usr/bin/npm still 1.4.21
    sudo npm install -g n
    sudo n stable # upgraded to node v12.18.4

## Build zwave2mqtt

User `hass`

mkdir -p src/zwave2mqtt
    # though actually I just pushed v4.0.3 and "live" from canard
    git clone https://github.com/OpenZWave/Zwave2Mqtt
    npm install  # takes a long time because it's freaking 571MB of stuff
    npm run build

## Other issues

*   After building with node v8 then upgrading to node v12 had to reinstall fibers `npm install fibers` before doing `npm run build` 
*   More version issues so `npm rebuild`

[1]: AutomationHub
 [2]: http://home-assistant.io
 [24]: Pixie?action=sourceblock&num=1
 [25]: Pixie?action=sourceblock&num=2
 [27]: Pixie?action=sourceblock&num=3
 [28]: Pixie?action=sourceblock&num=4
 [29]: LetsEncrypt
 [30]: Pixie?action=sourceblock&num=5
 [32]: Pixie?action=sourceblock&num=6
 [33]: Pixie?action=sourceblock&num=7
 [35]: Pixie?action=sourceblock&num=8
 [36]: Pixie?action=sourceblock&num=9
 [37]: Pixie?action=sourceblock&num=10

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