BLE Heart Rate Monitor (ESP BLE Proxy)

This custom Home Assistant integration connects to a Bluetooth Low Energy (BLE) Heart Rate Monitor (HRM) using Home Assistant’s ESP BLE Proxy and exposes the heart rate (bpm) as a sensor.

The integration uses the standard Heart Rate Service (UUID 0x180D) and subscribes to Heart Rate Measurement notifications (UUID 0x2A37).

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✨ Features

• ❤️ Reads heart rate in beats per minute (bpm)
• 📡 Uses ESPHome ESP32 BLE Proxy
• 🔔 Uses BLE notifications (no polling)
• 🧩 UI-based setup (MAC address entered in Home Assistant UI)
• 🧠 Correct parsing of 8-bit and 16-bit HR values
• ⚡ Low latency, real-time updates

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📦 Requirements

• Home Assistant 2023.9 or newer
• At least one ESP32 running ESPHome with BLE Proxy enabled
• A BLE Heart Rate Monitor that supports:
  • Heart Rate Service 0x180D
  • Heart Rate Measurement Characteristic 0x2A37

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🔧 ESPHome BLE Proxy Configuration

Your ESP32 must include this in its ESPHome YAML:

esp32_ble_tracker:

bluetooth_proxy:
  active: true