Added documentation for new integration igloohome (#35784)

source/_integrations/igloohome.markdown

@@ -0,0 +1,77 @@
+---
+title: igloohome
+description: Integrates igloohome smart access devices.
+ha_category:
+  - Sensor
+ha_release: 2025.2
+ha_config_flow: true
+ha_iot_class: Cloud Polling
+ha_codeowners:
+  - '@keithle888'
+ha_domain: igloohome
+ha_platforms:
+  - sensor
+ha_integration_type: device
+---
+
+The **igloohome** {% term integration %} grants Home Assistant access to paired [smart access device\(s\)](https://www.igloohome.co/#products). The features of this integration includes:
+
+- For [Bridge](https://www.igloohome.co/products/bridge) owners:
+  - Regular updates of all linked devices' battery level.
+
+- For non-bridge owners:
+  - Regular updates of devices' last-known battery level.
+    - Battery levels are updated by using the sync function on igloohome mobile app with the device.
+
+## Prerequisites
+
+- You own an igloohome device(s) and have paired them to an account.
+- Have an active subscription on [iglooaccess](https://access.igloocompany.co/register) with the same account.
+
+## Setup
+
+Once you have registered and activated your [iglooaccess](https://access.igloocompany.co/register) account:
+
+- [Sign in](https://access.igloocompany.co/login).
+- Jump to [API access](https://access.igloocompany.co/api-access).
+- Create a set of credentials with the name `Home Assistant`.
+- Copy out the `Client ID` & `Client Secret`.
+- Keep these credentials secure and never share them with others.
+- Add this integration to your Home Assistant instance.
+- Copy the `Client ID` & `Client Secret` to the respective text fields when prompted by the integration.
+- The integration will retrieve the devices under your account and create entries for them in Home Assistant.
+
+{% include integrations/config_flow.md %}
+
+{% configuration_basic %}
+Client ID:
+  description: "Client ID provided by your iglooaccess account."
+  required: true
+  type: string
+Client secret:
+  description: "Client Secret provided by your iglooaccess account."
+  required: true
+  type: string
+{% endconfiguration_basic %}
+
+## Removing the integration
+
+This integration follows standard integration removal. No extra steps are required.
+
+{% include integrations/remove_device_service.md %}
+
+## Troubleshooting
+
+Some generic troubleshooting steps:
+
+- Ensure that your subscription is still active.
+
+### Battery levels not updating
+
+- If you are using a bridge, ensure that it is linked to the correct devices.
+- If you do not have a bridge. Sync the device with the igloohome mobile app, then reload the config entry associated to the device.
+
+### Authentication problems
+
+- Verify that your [API credentials](https://access.igloocompany.co/api-access) are correctly filled in.
+- Ensure your API credentials have not expired or been revoked.