Add eheimdigital integration (#35034)

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

source/_integrations/eheimdigital.markdown

@@ -0,0 +1,45 @@
+---
+title: EHEIM Digital
+description: Instructions on how to set up EHEIM Digital with Home Assistant.
+ha_category:
+  - Light
+ha_release: 2025.1
+ha_iot_class: Local Polling
+ha_config_flow: true
+ha_codeowners:
+  - '@autinerd'
+ha_domain: eheimdigital
+ha_integration_type: hub
+ha_platforms:
+  - light
+---
+
+The **EHEIM Digital** {% term integration %} allows you to control your [EHEIM Digital](https://eheim.com/en_GB/aquatics/eheim-digital/) smart aquarium devices from Home Assistant.
+
+{% include integrations/config_flow.md %}
+
+{% configuration_basic %}
+Host:
+    description: "The IP address or hostname of your EHEIM Digital main device. Defaults to `eheimdigital.local`, an IP address should only be necessary if the hostname doesn't work."
+    required: true
+    type: string
+{% endconfiguration_basic %}
+
+## Supported devices and entities
+
+Currently, the following devices and entities are supported:
+
+### [EHEIM classicLEDcontrol+e](https://eheim.com/en_GB/aquatics/technology/lighting-control/classicledcontrol-e/classicledcontrol-e)
+
+#### Lights
+
+- **Brightness**: Controlling the brightness of both light channels
+- **Daycycle mode effect**: Automatically controls the brightness based on the daytime as configured on the device
+
+Support for additional EHEIM Digital devices and entities will be added in future updates.
+
+## Remove integration
+
+This integration follows standard integration removal, no extra steps are required.
+
+{% include common-tasks/remove_device_service.md %}