> For the complete documentation index, see [llms.txt](https://wiki.inels.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.inels.com/inels-harmony/welcome-to-inels-harmony.md).

# Welcome to iNELS Harmony

The hotel system that runs your rooms and your front desk from one place.

Harmony joins two worlds that normally sit in separate systems:

* **Your building** — lights, heating, door and window contacts, occupancy sensors, card readers and electronic locks.
* **Your business** — reservations, guests, check-in and check-out, cleaning and reports.

Because both live in one system, a check-out can drop the heating, stop the guest's key working and put a cleaning task on a housekeeper's phone — without anyone typing it in twice.

## Three apps, three jobs

Harmony is not one screen. It is three web apps sharing one database, and most people only ever need one of them.

{% tabs %}
{% tab title="Administration" %}
**Who uses it:** the installer, the hotel's IT contact, and the manager.

**What it is for:** setting the hotel up — gateways, rooms, devices, users, licence and integrations — plus reports and the housekeeping board.

**Address:** `http://<your-server>:81`
{% endtab %}

{% tab title="Reception" %}
**Who uses it:** front-desk staff.

**What it is for:** reservations, guests, keys and cards, room control and live service requests.

**Address:** `http://<your-server>:82`
{% endtab %}

{% tab title="Housekeeping" %}
**Who uses it:** cleaning staff, on a phone.

**What it is for:** today's cleaning tasks — start, finish, skip, leave a note.

**Address:** `http://<your-server>:83`
{% endtab %}
{% endtabs %}

{% hint style="success" %}
You do not have to remember which address is which. Sign in anywhere and Harmony sends you to the app your role belongs to.
{% endhint %}

## Where should you start?

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>I am setting the system up</strong></td><td>Installers, integrators and IT. Nine steps from an empty system to a hotel ready for guests.</td><td><a href="/inels-harmony/administration.md">Administration</a></td></tr><tr><td><strong>I work at the front desk</strong></td><td>Bookings, check-in, keys and room control — everything a receptionist does in a shift.</td><td><a href="/inels-harmony/reception.md">Reception</a></td></tr><tr><td><strong>I clean rooms</strong></td><td>The phone app: see your rooms, start a clean, mark it done.</td><td><a href="/inels-harmony/housekeeping.md">Housekeeping</a></td></tr></tbody></table>

Everyone should also read [Getting started](/inels-harmony/getting-started.md) once — signing in, who can see what, and the layout every screen shares.

## What runs behind the screens

Everything runs on a single server inside the hotel. No internet connection is needed for day-to-day work — only for activating a licence and downloading updates.

```
Guest room hardware
   │  BUS · eLAN · REST
   ▼
Gateway drivers ──► message broker ──► Administration  :81
                          │             Reception      :82
                          ▼             Housekeeping   :83
                      database ◄────────────┘
                          ▲
                          └── PMS · channel manager · door locks  (optional)
```

{% hint style="info" %}
**This manual is also inside the product.** Every Harmony installation serves these pages offline at `http://<your-server>:81/help/`, reached from the **Help** item in the sidebar. Useful when the hotel's internet is down.
{% endhint %}