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HASS Cheatsheet.md

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If RPi is not syncing the time

Use the systemd-timesyncd service as explained here Here are the time servers that I used.

NTP=0.north-america.pool.ntp.org 1.north-america.pool.ntp.org 2.north-america.pool.ntp.org 3.north-america.pool.ntp.org
FallbackNTP=0.arch.pool.ntp.org 1.arch.pool.ntp.org 2.arch.pool.ntp.org 3.arch.pool.ntp.org

Configuring WinSCP to edit HASS files

Default AIO installation does not allow editing the configuration files in WinSCP. To enable the same, you will need to change the SFTP server (in Advanced settings -> Environment -> SFTP).

  1. Obtain the SFTP by running grep sftp /etc/ssh/sshd_config at the pi shell. You will get something like, Subsystem sftp /usr/lib/openssh/sftp-server.
  2. Now, set the sftp server to: sudo su -c /usr/lib/openssh/sftp-server (note that the /usr/lib/openssh/sftp-server is the same path obtained from the previous step) and set Shell to sudo -s.

Install Homebridge on a Pi

You can install Homebridge on a Pi using the following commands:

  1. Make sure your Pi is updated.
  2. Install all the dependencies
sudo apt-get install git make
curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash -
sudo apt-get install -y nodejs
sudo apt-get install libavahi-compat-libdnssd-dev
  1. Install both Homebridge and Homebridge-Homeassistant plugin using:
sudo npm install -g --unsafe-perm homebridge
sudo npm install -g homebridge-homeassistant
  1. You need to modify the config.json (located at /home/pi/.homebridge/config.json). Here's what I'm using (Homebridge on Pi connects to my HA on a NUC):
{
  "bridge": {
    "name": "Homebridge",
    "username": "CC:22:3D:E3:CE:34",
    "port": 51826,
    "pin": "031-45-155"
  },

  "description": "This is the main Homebridge configuration file for Home Assistant. This will bridge Home Assistant and HomeKit together!",

  "accessories": [
  ],
  "platforms": [
    {
      "platform": "HomeAssistant",
      "name": "HomeAssistant",
      "host": "https://192.168.X.Y:8123",
      "password": "",
      "supported_types": ["group", "binary_sensor", "climate", "cover", "device_tracker", "fan", "input_boolean", "light", "lock", "media_player", "scene", "sensor", "switch"],
      "logging": true,
      "verify_ssl": false
    }
  ]
}
  1. Follow the instructions here to boot Homebridge on startup.
  2. If you get an error "Couldn't add Homebridge" on your iOS Home App, please make sure that there are only less than 100 Homebridge entities enabled.
  3. For remote access to Homebridge devices, you will need to enable 2FA on your iOS devices. If you are not able to remotely access your Homebridge devices, you may have to sign out, restart, and sign back in to your Apple TV.

Mosquitto operations

I am using the default AIO username/password, replace them with yours

  1. You can remove a topic from Mosquitto using mosquitto_pub -r -n -u 'pi' -P 'raspberry' -t 'owntracks/arsaboo/mqttrpi'
  2. To subscribe to all the topics use mosquitto_sub -h 192.168.2.212 -u 'pi' -P 'raspberry' -v -t '#' (replace the IP address)
  3. To publish use mosquitto_pub -u 'pi' -P 'raspberry' -t 'smartthings/Driveway/switch' -m 'on' (use the relevant topic).
  4. You can find the path to mosquitto_pub using which mosquitto_pub; restart Mosquitto using sudo systemctl restart mosquitto.

HASS operations

  1. To check realtime logs sudo journalctl -f -u home-assistant@homeassistant
  2. To restart HA sudo systemctl restart home-assistant@homeassistant
  3. To check logs sudo systemctl status -l home-assistant@homeassistant
  4. To stop HA sudo systemctl stop home-assistant@homeassistant
  5. To start HA sudo systemctl start home-assistant@homeassistant

Backing up Configurations on Github

Thanks to @dale3h for assistance with these instructions.

  1. Install git using sudo apt-get install git

  2. Go to https://github.com/new and create a new repository. I named mine homeassistant-config. Initialize with readme: no and .gitignore: none.

  3. Navigate to your .homeassistant directory. For AIO, it should be /home/hass/.homeassistant, and for HASSbian, it is /home/homeassistant/.homeassistant.

  4. Run sudo su -s /bin/bash hass for AIO and sudo su -s /bin/bash homeassistant for HASSbian.

  5. Run wget https://raw.githubusercontent.com/arsaboo/homeassistant-config/master/.gitignore to get the .gitignore file from your repo (replace the link to match your repository). You can add things to your .gitignore file that you do not want to be uploaded.

  6. Next, we need to add SSH keys to your Github account.

    • Navigate to cd /home/hass/.ssh (for AIO). If you don't have .ssh directory, create one and change the permission chmod 700 ~/.ssh.
    • Run ssh-keygen -t rsa -b 4096 -C "homeassistant@pi". If you want to enter a passphrase, that's up to you. If you do, you'll have to enter that passphrase any time you want to update your changes to github. If you do not want a passphrase, leave it blank and just hit Enter.
    • Save the key in the default location (press Enter when it prompts for location).
    • When you're finished, run ls -al ~/.ssh to confirm that you have both id_rsa and id_rsa.pub files.
    • Go to https://github.com/settings/keys and click New SSH key button at top right. Title: homeassistant@pi (or whatever you want, really...it's just for you to know which key it is)
    • Run cat id_rsa.pub in the SSH session and copy/paste the output to that github page.
    • Then click Add SSH key button.

  7. Go back to your repo page on GitHub. It'll be something like https://github.com/yourusernamehere/homeassistant-config. Click the green Clone or download button, and then click Use SSH.

  8. You should see something like this in the textbox: [email protected]:yourusername/homeassistant-config.git. Copy that to your clipboard.

  9. Now you are ready to upload the files to GitHub.

    • Navigate to cd ~/.homeassistant
    • git init
    • git add .
    • git commit -m 'initial commit'
    • If you get an error about *** Please tell me who you are., run git config --global user.email "[email protected]" and git config --global user.name "Your Name"
    • After that commit succeeds, run: git remote add origin [email protected]:yourusername/homeassistant-config.git (make sure you enter the correct repo URL here)
    • Just to confirm everything is right, run git remote -v and you should see: 
      hass@raspberrypi:~/.homeassistant$ git remote -v
origin  [email protected]:arsaboo/homeassistant-config.git (fetch)
origin  [email protected]:arsaboo/homeassistant-config.git (push)
    • Finally, run git push origin master.

  10. For subsequent updates:

    • cd /home/homeassistant/.homeassistant
    • sudo su -s /bin/bash homeassistant
    • git add .
    • git commit -m 'your commit message'
    • git push origin master

  11. To restore from your Github repository (replace the URL):

    sudo su -s /bin/bash homeassistant
cd /home/homeassistant
git clone [email protected]:arsaboo/homeassistant-config.git .homeassistant

Integrating HASS (AIO) with Smartthings using Mosquitto

If you are using AIO (which has Mosquitto pre-installed), you can use the following to integrate SmartThings and HA.

  1. Install node.js, and pm2 
    sudo apt-get update && sudo apt-get upgrade -y
curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -
sudo apt-get install -y nodejs
sudo npm install -g pm2
sudo su -c "env PATH=$PATH:/usr/local/bin pm2 startup systemd -u pi --hp /user/pi"
  2. Install the SmartThings MQTT Bridge 
    $ sudo npm install -g smartthings-mqtt-bridge
  3. Add details of your Mosquitto to config.yml. For the default AIO username password, your file should look something like: 
    mqtt:
    # Specify your MQTT Broker's hostname or IP address here
    host: mqtt://192.168.2.199
    # Preface for the topics $PREFACE/$DEVICE_NAME/$PROPERTY
    preface: smartthings

    # Suffix for the state topics $PREFACE/$DEVICE_NAME/$PROPERTY/$STATE_SUFFIX
    # state_suffix: state
    # Suffix for the command topics $PREFACE/$DEVICE_NAME/$PROPERTY/$COMMAND_SUFFIX
    # command_suffix: cmd

    # Other optional settings from https://www.npmjs.com/package/mqtt#mqttclientstreambuilder-options
    username: pi
    password: raspberry

# Port number to listen on
port: 8080
  4. Start ST-MQTT bridge pm2 start smartthings-mqtt-bridge
  5. Follow the rest of the instructions (from step 2) listed here.
  6. Once pm2 runs the program, you can then run pm2 save to save the running programs into a configuration file.
  7. You can then run pm2 as a systemd or service by running the command that you get after running pm2 startup systemd (run this without sudo).

To upgrade HASS manually:

  • Login to system. HASS configuration files are saved in /home/homeassistant/.homeassistant and the code files are saved in /srv/homeassistant/lib/python3.5/site-packages/homeassistant/.
  • Change to homeassistant user sudo su -s /bin/bash homeassistant
  • Change to virtual enviroment source /srv/homeassistant/bin/activate
  • Update HA pip3 install --upgrade homeassistant. To update to a different branch, use the complete git URL, pip3 install --upgrade git+git://github.com/home-assistant/home-assistant.git@dev
  • Type exit to logout the hass user and return to the pi user.
  • Restart the Home-Assistant Service sudo systemctl restart home-assistant@homeassistant

Setting up MySQL

Follow the instructions here to set-up MySQL.

sudo apt-get update && sudo apt-get upgrade -y
sudo apt-get install mysql-server && sudo apt-get install mysql-client
sudo apt-get install libmysqlclient-dev
sudo apt-get install python-dev python3-dev
sudo pip3 install --upgrade mysql-connector
sudo pip3 install mysqlclient

Create homeassistant database and grant privileges:

mysql -u root -p
CREATE DATABASE homeassistant;
CREATE USER 'hass'@'localhost' IDENTIFIED BY 'PASSWORD';
GRANT ALL PRIVILEGES ON homeassistant.* TO 'hass'@'localhost';
FLUSH PRIVILEGES;
exit;

Test if user works:

mysql -u hass homeassistant -p
exit;

Switch to homeassistant user:

sudo su -s /bin/bash homeassistant
source /srv/homeassistant/bin/activate
pip3 install --upgrade mysqlclient
exit

Add to configuration.yaml and restart HA.

recorder:
  db_url: mysql://hass:********@127.0.0.1/homeassistant?charset=utf8

Some useful commands:

  • Use mysqlshow -h localhost -u hass -p homeassistant to show the tables that are created.
  • To delete all tables and start from scratch, run DROP DATABASE homeassistant; and recreate homeassistant database and grant privileges.
  • Use sudo apt-get remove --purge mysql\* to delete anything related to packages named mysql.
  • show tables to list all the tables.
  • desc states to describe table states.
  • (SELECT event_id, time_fired FROM events ORDER BY event_id ASC LIMIT 1) UNION ALL (SELECT event_id, time_fired FROM events ORDER BY event_id DESC LIMIT 1); to list the first and last record of events table.
  • SELECT table_schema homeassistant, sum( data_length + index_length ) / (1024 * 1024) "Data Base Size in MB" FROM information_schema.TABLES GROUP BY table_schema; to list disk space used by each database.
  • select entity_id, count(*), sum(length(state)), sum(length(attributes))/ (1024 * 1024) siz from states group by entity_id order by siz; to obtain the space (in MB) occupied by each entity in the states table.

Miscellaneous Tips/Tricks

  • You can test the Read Speed of your SD card using (note, this command takes some time to run): 
    sudo dd if=/dev/mmcblk0 of=/dev/null bs=8M count=100
sudo hdparm -t /dev/mmcblk0
  • Many of the problems with Pi are related to faulty power supply. You can use vcgencmd get_throttled to check if your Pi is getting adequate power supply. You want that to return throttled=0x0. If not it means that the Raspberry is throttling itself due to low voltage, or other factors.
  • Test Write speed (will create 200MB file in /home/pi/testfile) using dd if=/dev/zero of=/home/pi/testfile bs=8M count=25
  • To check which files are using up all the space on your SD card, run sudo du | sort -n. You can delete the culprits using something like sudo rm -rf ./.pm2/logs/ (will recursively delete folder /logs/).