---
title: "Discussion on \"How Bluetooth Low Energy (BLE) Actually Works: Architecture, GAP, GATT and Device Roles\" | Hashnode"
description: "Discussion on \"How Bluetooth Low Energy (BLE) Actually Works: Architecture, GAP, GATT and Device Roles\". A practical guide to Bluetooth Low Energy connectivity covering Central and Peripheral roles, device discovery, GATT services, characteristics, and re"
url: "https://hashnode.com/posts/how-bluetooth-low-energy-ble-actually-works-architecture-gap-gatt-and-device-roles/69ba37f1c22d3eeb8a37dc4d"
---

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# [How Bluetooth Low Energy (BLE) Actually Works: Architecture, GAP, GATT and Device Roles](https://sukhdeep.hashnode.dev/how-bluetooth-low-energy-ble-actually-works-architecture-gap-gatt-and-device-roles?utm_source=hashnode&utm_medium=feed)

A practical guide to Bluetooth Low Energy connectivity covering Central and Peripheral roles, device discovery, GATT services, characteristics, and re

Mar 18 · 8 min read · sukhdeep.hashnode.dev  
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-   [#bluetooth-low-energy](https://hashnode.com/tag/bluetooth-low-energy)
-   [#ble-communication](https://hashnode.com/tag/ble-communication)
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-   [#iot](https://hashnode.com/tag/iot)
-   [#androiddev](https://hashnode.com/tag/androiddev)
-   [#ble-scanning](https://hashnode.com/tag/ble-scanning)

## Written by

[Sukhdeep Hunjan](https://hashnode.com/@sukhsingh)

@sukhsingh · Delhi, India

  
[View profile](https://hashnode.com/@sukhsingh)

I have worked across multiple industries in web and mobile application development, supporting both enterprise platforms and product-based solutions. My focus has been on building scalable applications, improving system architecture, and ensuring smooth development and delivery processes.

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