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Technical notes

Keeping these here mostly for personal reference.

Samsung TV

TV Model: UE48H6200AW Using https://github.com/McKael/samtv to control samsung tv. To Pair:

./samtvcli --server $SAMSUNGTV_IP pair
# Wait for TV to show pin
./samtvcli --server $SAMSUNGTV_IP pair --pin <pincode>
# CLI will print session id and session key, record these

Older info:

Learned about v2 from here: Ape/samsungctl#22

# TV off
$ curl -I -m 2 http://$SAMSUNGTV_IP:8001/api/v2/
curl: (28) Connection timed out after 2001 milliseconds

# TV on
$ curl -I -m 2 http://$SAMSUNGTV_IP:8001/api/v2/
curl: (7) Failed to connect to $SAMSUNGTV_IP port 8001: Connection refused

InfluxDB:

export INFLUX_USERNAME="$(vault-get influxdb_admin_user)";export INFLUX_PASSWORD="$(vault-get influxdb_admin_password)"; export INFLUX_HOST="$HASS_IP";

echo "export INFLUX_USERNAME=\"$INFLUX_USERNAME\"; export INFLUX_PASSWORD=\"$INFLUX_PASSWORD\";"
influx -ssl --unsafeSsl -username "$INFLUX_USERNAME" -password "$INFLUX_PASSWORD"
# Examples
show users;
show grants for "<example user>";
use mydatabase;
show series; # recall, influx doesn't have tables, it has timeseries

influx -ssl --unsafeSsl -username "$INFLUX_USERNAME" -password "$INFLUX_PASSWORD" -execute "show databases"


influx -ssl --unsafeSsl -username "$INFLUX_USERNAME" -password "$INFLUX_PASSWORD" -host "$INFLUX_HOST"  -execute "show databases"

python-nest

source /opt/homeassistant/.venv/bin/activate
export NEST_CLIENT_ID=$(grep "nest:" -A 2 /opt/homeassistant/configuration.yaml  | awk '/client_id/{print $2}')
export NEST_CLIENT_SECRET=$(grep "nest:" -A 2 /opt/homeassistant/configuration.yaml  | awk '/client_secret/{print $2}')
nest --client-id $NEST_CLIENT_ID --client-secret $NEST_CLIENT_SECRET --token-cache /opt/homeassistant/nest.conf --index 0 camera-show

grafana

Using this tool for backups: https://github.com/ysde/grafana-backup-tool

Backup restoration:

# 1. Get token from http://casa:3001/org/apikeys
# 2. Update grafana_backups_api_token in casa-data
# 3. Run this:
ansible-playbook -i ~/repos/casa-data/inventory/prod home.yml --tags backups,grafana-restore-backup -e "recreate_containers=no grafana_restore_backup=true"

Note that the exported json files (with extension .dashboard) can not just be imported through the grafana UI, you need to use the same grafana-backup-tool to do the restore, like so:

cd /tmp; git clone https://github.com/ysde/grafana-backup-tool.git
# 1. Get token from http://casa:3001/org/apikeys
# 2. Update grafana_backups_api_token in casa-data
export GRAFANA_URL="http://casa:3001"; export GRAFANA_TOKEN="$(vault-get grafana_backups_api_token)";
python grafana-backup-tool/createDashboard.py ~/Downloads/dashboards/Overview.dashboard
ansible-playbook -i ~/repos/casa-data/inventory/prod home.yml --tags backups

Miscellaneous notes

SCP

scp -P 2222 -i ~/repos/casa/.vagrant/machines/home/virtualbox/private_key [email protected]:/home/ubuntu/redis.conf .

Hass APIs

export HASS_URL="http://0.0.0.0:8123"; export HASS_PASSWORD="$(awk '/api_password: /{print $2}'  /opt/homeassistant/configuration.yaml)"

export HASS_URL="http://$HASS_IP:8123"; export HASS_PASSWORD="$(vault-get ' api_password')"; export HASS_TOKEN="$(vault-get 'local_integrations')";

# Getting  entity picture
curl -s -H "Authorization: Bearer $HASS_TOKEN" -H "Content-Type: application/json" $HASS_URL/api/states/camera.hallway | jq -r ".attributes.entity_picture"
# Error log:
curl -s -H "Authorization: Bearer $HASS_TOKEN" -H "Content-Type: application/json" $HASS_URL/api/error_log

# Specific entity state:
curl -s -H "Authorization: Bearer $HASS_TOKEN" -H "Content-Type: application/json" $HASS_URL/api/states/light.office


# Turn on light
curl -s -H "Authorization: Bearer $HASS_TOKEN" -H "Content-Type: application/json" -d '{"entity_id": "light.office"}' $HASS_URL/api/services/light/turn_on

seshat

export INFLUXDB_BIND_IP="0.0.0.0"
export INFLUXDB_DB=""
export INFLUXDB_USERNAME=""
export INFLUXDB_PASSWORD=""


/usr/bin/node /opt/sensu/checks/seshat/dist/duration.js -k --measurement sensor.desk_state --state up --write-duration --host $INFLUXDB_BIND_IP --database $INFLUXDB_DB  --username $INFLUXDB_USERNAME  --password $INFLUXDB_PASSWORD

Extra open ports

6379 -> Redis

1400 -> Homeassistant SoCo API (Sonos) https://github.com/home-assistant/home-assistant/blob/44e4f8d1bad624f8d27dfda7230f0a0a2409a404/homeassistant/components/media_player/sonos.py#L557

631 -> IPP Port (Internet Printing Protocol) TODO: Disable/remove CUPS

8088 -> InfluxDB

3030, 3031 -> Sensu-client (Ruby)

5355 -> systemd resolve: https://askubuntu.com/questions/907246/how-to-disable-systemd-resolved-in-ubuntu

IPv6 traffic?

Sonos-http-api

When Sonos playbar is streaming from tv the /TV Room/state call returns the following. When turning off the TV, this state stays the same, except for the elapsedTime being reset to 0. This does also happen at different occasions (e.g. when switching HDMI inputs, etc), so this doesn't seem to be a reliable way of determining whether the TV is on or off.

curl -s "http://192.168.1.121:5005/TV%20Room/state" | jq

{
  "volume": 24,
  "mute": false,
  "equalizer": {
    "bass": 0,
    "treble": 0,
    "loudness": true,
    "speechEnhancement": false,
    "nightMode": false
  },
  "currentTrack": {
    "duration": 0,
    "uri": "x-sonos-htastream:RINCON_B8E93742407C01400:spdif",
    "type": "line_in",
    "stationName": ""
  },
  "nextTrack": {
    "artist": "",
    "title": "",
    "album": "",
    "albumArtUri": "",
    "duration": 0,
    "uri": ""
  },
  "trackNo": 1,
  "elapsedTime": 74,
  "elapsedTimeFormatted": "00:01:14",
  "playbackState": "PLAYING",
  "playMode": {
    "repeat": "none",
    "shuffle": false,
    "crossfade": false
  }
}

Tests

cd tests  # important to be inside the tests directory!

virtualenv .venv
pip install -r test-requirements.txt

source activate .venv # conda env
cd tests  # important to be inside the tests directory!
pytest -rw -s --hadashboard-url http://$HASS_IP:5050 --homeassistant-url http://$HASS_IP:8123 --homeassistant-token "$(vault-get 'local_integrations')" tests/

# sanity only
pytest -m sanity -rw -s --hadashboard-url http://$HASS_IP:5050 --homeassistant-url http://$HASS_IP:8123 --homeassistant-token "$(vault-get 'local_integrations')" tests/

Prometheus

Add basic auth through nginx (or envoy?): https://prometheus.io/docs/guides/basic-auth/

Checks to convert:

  • Roofcam alive
  • Roofcam water detector
  • Sonos Error