Notify on menu orders via ntfy and Home Assistant TTS with daily BAC tracking

Notify on menu orders via ntfy and Home Assistant TTS with daily BAC tracking

Receive instant push notifications on your phone and voice announcements on your Google Home every time someone orders from your intranet menu — with cumulative BAC tracking per person.

> Full documentation & step-by-step setup guides: > 📖 Notion Documentation > 💻 GitHub Repository

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What This Workflow Does

Every time a customer submits an order from your intranet menu website, this workflow:

1. Receives the order via Webhook
2. Logs it to an n8n DataTable and reads all orders for that person today
3. Calculates the cumulative BAC (Blood Alcohol Content) using the Widmark formula
4. Sends a push notification via ntfy (with order history + BAC level)
5. Triggers a Home Assistant script → voice announcement on Google Home

No cloud TTS fees. No external AI services. Fully self-hosted.

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Flow

Webhook → Prepare Order → DataTable (INSERT) → Read Today's Orders → BAC Calculator → ntfy Push Notification → Home Assistant TTS

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Example Output

Push notification (ntfy app):

🛎 Order from Mario

Mario: 1x Pizza, 2x Beer 33cl
🕐 12:30
📋 Ordered before:
 - 1x Prosecco 🕐 11:45
🍸 BAC ~0.54 g/L 🔴

Google Home voice announcement:

Mario has ordered Pizza

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Prerequisites

Before importing this workflow, you need:

• A running n8n instance (self-hosted or cloud) reachable from the internet
• Home Assistant on your local network (e.g. homeassistant.local:8123)
• At least one Google Home (or Chromecast-capable) device added to HA via the Google Cast integration
• ntfy deployed via Docker (self-hosted push notification server)
• A public HTTPS URL for ntfy — recommended via Cloudflare Tunnel (no open ports needed)
• An Android or iOS device with the ntfy app installed

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Credentials Required

Credential	Used For
Home Assistant	Calling the annuncia_ordine TTS script
Header Auth (Authorization: Bearer <ntfy_token>)	Sending authenticated requests to ntfy

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n8n DataTable Schema

Create a DataTable in n8n → Data → Tables with these columns:

Column	Type	Description
item	Text	Full order string (e.g. "2x Negroni, 1x Messina 33cl")
person	Text	Normalised person name
alcol_grammi	Number	Total grams of alcohol for this order
data	Text	ISO date (YYYY-MM-DD)
orario	Text	Time string from the order

Copy the DataTable ID and paste it into the DataTable nodes inside the workflow.

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Webhook Payload

Your menu website must POST this JSON to the Webhook Production URL:

{
 "name": "Mario",
 "time": "26/03/2026, 12:30:00",
 "order": [
 { "section": "Food", "name": "Pizza", "details": "", "quantity": 1 },
 { "section": "Drinks", "name": "Beer", "details": "33cl", "quantity": 2 }
 ],
 "total": 3
}

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Setup Steps

1. Deploy ntfy (self-hosted push notifications)

Add ntfy to your docker-compose.yml:

ntfy:
 image: binwiederhier/ntfy
 command: serve
 volumes:
 - ./ntfy/config:/etc/ntfy
 - ./ntfy/data:/var/lib/ntfy
 ports:
 - "8095:80"

In server.yml, set auth-default-access: deny-all.

Then create an admin user and generate a token:

docker exec -e NTFY_PASSWORD="your_password" ntfy ntfy user add --role=admin admin
docker exec ntfy ntfy token add admin

2. Expose ntfy over HTTPS (Cloudflare Tunnel)

Add an ingress rule to your Cloudflare Tunnel config:

- hostname: ntfy.YOUR_DOMAIN.com
 service: http://localhost:8095

3. Configure Home Assistant TTS

In HA, go to Settings → Automations & Scenes → Scripts → Add script → Edit in YAML and paste:

alias: annuncia_ordine
sequence:
 - action: tts.speak
 target:
 entity_id: tts.google_translate_en_com
 data:
 media_player_entity_id: media_player.YOUR_GOOGLE_HOME_ENTITY
 message: "{{ message }}"
 language: it
mode: single

> Replace media_player.YOUR_GOOGLE_HOME_ENTITY with your actual entity ID.

Then go to your HA profile → Security → Long-lived access tokens → create and copy a token.

4. Import and configure the workflow

1. Import the workflow JSON into n8n

2. Create the DataTable (columns listed above) — copy its ID

3. Create the Header Auth credential for ntfy:

• Header Name: Authorization
• Header Value: Bearer YOUR_NTFY_TOKEN

4. Create the Home Assistant credential:

• Host: http://homeassistant.local:8123
• Access Token: your HA long-lived token

5. In the ntfy notification node, replace YOUR_TOPIC in the URL

6. In the Home Assistant TTS node, set the message attribute expression:

={{ $('Webhook').item.json.body.nome }} has ordered {{ $('Webhook').item.json.body.ordine[0].nome }}

7. Activate the workflow and copy the Webhook Production URL

5. Configure your menu website

Set the webhook URL in your menu site config:

// menu-data.js
"orderWebhook": "https://YOUR_N8N_DOMAIN/webhook/menu"

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BAC Calculation (Widmark Formula)

BAC [g/L] = total_alcohol_grams_today / (70 × 0.68)

Assumes ~70 kg body weight. Italian legal driving limit: 0.5 g/L

Emoji	Level	BAC
⬜	None	0 g/L
🟢	Low	< 0.2 g/L
🟡	Warning	0.2 – 0.5 g/L
🔴	Over limit	> 0.5 g/L

BAC is cumulative per day per person and resets automatically the next day.

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Customization

What	How
Change the TTS message	Edit the message expression in the HA TTS node
Announce all ordered items	Use $json.body.ordine.map(i => i.quantita + ' ' + i.nome).join(', ')
Change TTS language	Edit language in the annuncia_ordine HA script
Announce on multiple Google Home devices	Add multiple media_player_entity_id entries to the HA script
Disable TTS (keep only push notification)	Remove or deactivate the Home Assistant TTS node

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Security

Layer	Mechanism
Transport (ntfy)	HTTPS via Cloudflare Tunnel
ntfy access	auth-default-access: deny-all — no anonymous reads
n8n → ntfy	Dedicated Bearer token (revokable, no expiry)
n8n → Home Assistant	Long-lived access token
Mobile app	Username/password on the ntfy server

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Documentation & Source

📖 Full documentation	Notion — step-by-step setup guides
💻 GitHub Repository	paoloronco/n8n-templates

Related Resources

• ntfy.sh documentation
• Home Assistant TTS documentation
• Home Assistant Scripts
• Google Cast integration
• n8n Home Assistant node