🔋 Home Assistant – Low Battery & Device Unavailable Check

A Home Assistant Blueprint that periodically checks a defined set of entities for:

• Low battery – numeric battery sensors below a configurable threshold
• Binary battery sensors in state on (= low)
• Unavailable devices (sensors, binary sensors, switches)

Sends a notification (or runs any action) listing all affected devices by name.

---

✨ Features

• Runs on a configurable time and optional weekday
• Include list (Pflichtfeld): only the selected entities are checked — no accidental alerts from unrelated devices
• Supports sensor, binary_sensor, and switch domains
• Fully customizable action (notification, persistent alert, TTS, etc.)
• Uses {{sensors}} variable in your action to list affected device names

---

📥 Installation

Option A – Import via URL

Click the button below or copy the raw URL into
Settings → Automations & Scenes → Blueprints → Import Blueprint:

https://raw.githubusercontent.com/YOUR_USERNAME/ha-battery-blueprint/main/low-battery-and-unavailable-check.yaml

Option B – Manual

1. Copy low-battery-and-unavailable-check.yaml into:

   config/blueprints/automation/YOUR_FOLDER/low-battery-and-unavailable-check.yaml
   

2. Reload automations in Home Assistant.

---

⚙️ Inputs

Input	Description	Default
Battery warning level	Threshold in % below which a sensor is considered low	20 %
Time to test on	Time of day the check runs	10:00:00
Weekday to test on	0 = every day, 1 = Monday … 7 = Sunday	0
Included Sensors (required)	Only these entities are checked. Devices must be expanded to individual entities!	—
Actions	What to do when issues are found – use {{sensors}} for the list of affected devices	—

---

📋 Example Action (Mobile Notification)

service: notify.mobile_app_your_phone
data:
  title: "🔋 Battery Warning"
  message: "Low battery or unavailable: {{ sensors }}"

---

🙏 Credits

Based on the original blueprint by sbyx.
Extended with include-only filtering and unavailability checks for switches.

---

📄 License

MIT