Home Assistant on Wael Nasreddine

Automation

Mon, 01 Jan 0001 00:00:00 +0000

alias: "OnCall: Page Wael"
description: "Pager is triggered with a Webhook and notifies me until I ack the page"
triggers:
 - trigger: webhook
 allowed_methods:
 - POST
 webhook_id: "-13dy9GK4x2S9t7gDzwMNqClO"
 local_only: false
conditions: []
actions:
 - sequence:
 - variables:
 ack_code: "{{ range(1000, 9999) | random }}"
 acked: false
 signal_messages_sent: 0
 call_frequency: 2
 - action: notify.signal_wael
 metadata: {}
 data:
 message: >-
 You are being paged by {{ trigger.json.email }} because {{
 trigger.json.reason }}. Reply with code {{ ack_code }} to ack the
 page.
 - variables:
 signal_messages_sent: "{{ signal_messages_sent + 1 }}"
 - repeat:
 sequence:
 - sequence:
 - wait_template: >-
 {% set received_code =
 states('sensor.signal_message_received') | trim | int(0) %}

 {% set expected_code = ack_code | int(0) %}

 {{ state_attr('sensor.signal_message_received',
 'sourceNumber') == '+15554443333' and
 received_code == expected_code and received_code != 0 }}
 continue_on_timeout: true
 timeout: "00:02:00"
 - if:
 - condition: template
 value_template: "{{ wait.completed }}"
 then:
 - variables:
 acked: true
 else:
 - sequence:
 - if:
 - condition: template
 value_template: "{{ signal_messages_sent == call_frequency }}"
 then:
 - sequence:
 - action: notify.twilio_call
 metadata: {}
 data:
 message: >-
 You are being paged by {{
 trigger.json.email }} because {{
 trigger.json.reason }}.
 target:
 - 16509333448
 - variables:
 call_frequency: "{{ [ call_frequency + 1, 5] | min }}"
 signal_messages_sent: 0
 else:
 - sequence:
 - action: notify.signal_wael
 data:
 message: >-
 You are being paged by {{
 trigger.json.email }} because {{
 trigger.json.reason }}. Reply with code {{
 ack_code }} to ack the page.
 - variables:
 signal_messages_sent: "{{ signal_messages_sent + 1 }}"
 until:
 - condition: template
 value_template: "{{ acked == true }}"
 - action: notify.signal_wael
 metadata: {}
 data:
 message: The page {{ ack_code }} was acked!
mode: queued
max: 5

Home Assistant remove all rtl_433 devices

Mon, 01 Jan 0001 00:00:00 +0000

Home Assistant remove all rtl_433 devices Link to heading

Home assistant does not have a way to mass delete devices; I want to delete all rtl_433 devices (there are many of them).

Code Link to heading

async function deleteDevices(manufacturer_to_delete) {
 let hass = document.querySelector("home-assistant").hass;
 let message = { type: "config/device_registry/list" };
 let count = 0;

 await hass.callWS(message).then(async(response) => {
 for (let i = 0; i < response.length; i++) {
 device = response[i];
 if (device["manufacturer"] === manufacturer_to_delete) {
 await hass.callWS({
 "type":"config/device_registry/remove_config_entry",
 "device_id": device["id"],
 "config_entry_id": device["config_entries"][0],
 }).then((response) => {
 console.log(`Deleted device ${JSON.stringify(device)}`);
 count++;
 })
 }
 }
 console.log(`Deleted ${count} devices`);
 })
}
await deleteDevices("rtl_433");

Resources Link to heading

https://community.home-assistant.io/t/some-entities-not-visible-in-rfxcom-rfxtrx/353134/4?u=kalbasit

Migrate home-assistant from SQLite to PostgreSQL

Mon, 01 Jan 0001 00:00:00 +0000

Migrate home-assistant from SQLite to PostgreSQL Link to heading

Problem Link to heading

I want to migrate home-assistant from SQLite to PostgreSQL.

Solution Link to heading

The migration involves the following steps:

Create a PostgreSQL database following PostgreSQL - Create UTF-8 Database and PostgreSQL - Create Role for a Database.
Configure home-assistant to use PostgreSQL.
Boot home-assistant to allow it to create the tables on PostgreSQL.
Dump the database (schema-only) and re-create the database and load the schema into it.
Workaround issue where sqlite store boolean as integer and postgres stores it as boolean.
Have pgloader migrate the database.
Undo the workaround.
Reset sequences so new records is correct.

Configure home-assistant to connect to PostgreSQL Link to heading

Follow this document to configure the recorder to connect to PostgreSQL.

Simple Oncall Pager with Home Assistant

Mon, 01 Jan 0001 00:00:00 +0000

Problem Link to heading

I need a simple pager that allows my clients to page me. The pager should first try to notify me by a Signal message, and if there is no answer, it should call me.

Solution Link to heading

High Level Workflow Link to heading

Frontend: A Cloudflare application deployed at https://page-wael.nasreddine.com, guarded by Google authentication.
Ingress: The Cloudflare application leads to a deployment on my Kubernetes cluster via a Cloudflare Tunnel.
User Interaction: The deployment serves a simple HTML page that collects the reason for the page.
Trigger: Once the user submits the form, the backend sends a POST request to a Home Assistant webhook.
Notification: The webhook triggers a Home Assistant automation that sends me a message on Signal containing:
- The email of the person triggering the page (extracted from the cf-access-authenticated-user-email header).
- The reason provided.
- A 4-digit ACK code.

Escalation Policy Link to heading

If I reply with the ACK code, the automation stops. As long as I do not ACK, the loop continues: