Bluetooth Low Energy sample

Shows how to use the Windows Bluetooth LE APIs to act either as a BLE client or server.

Note: This sample is part of a large collection of UWP feature samples. You can download this sample as a standalone ZIP file from, or you can download the entire collection as a single ZIP file, but be sure to unzip everything to access shared dependencies. For more info on working with the ZIP file, the samples collection, and GitHub, see Get the UWP samples from GitHub. For more samples, see the Samples portal on the Windows Dev Center.


Shows how to act as a client to communicate with a Bluetooth Low Energy (LE) device using the Bluetooth GATT protocol. Acts as a GATT client to access nearby GATT servers like heart rate sensors or temperature sensors.

Specifically, this sample shows how to:

  • Enumerate nearby Bluetooth LE devices
  • Query for supported services
  • Query for supported characteristics
  • Read and write data
  • Subscribe to indicate and notify events


As of build 15003 and above, Bluetooth LE GATT Server APIs are available. This sample can be used to advertise support for CalcService - a custom service that allows a remote client to write to two operand characteristics and an operator and read the result.

This samples shows how to:

  • Initialize and publish a custom service/characteristic hierarchy
  • Implement event handlers to handle incoming read/write requests
  • Notify connected clients of a characteristic value change

More Details

Search for "BT_Code" to find the portions of the sample that are particularly relevant to Bluetooth. Note in particular the "bluetooth" capability declaration in the manifest.

Note The Windows universal samples require Visual Studio to build and Windows 10 to execute.

To obtain information about Windows 10 development, go to the Windows Dev Center

To obtain information about Microsoft Visual Studio and the tools for developing Windows apps, go to Visual Studio


Bluetooth Rfcomm

Bluetooth Advertisement

Device Enumeration and Pairing


Windows.Devices.Bluetooth namespace

Windows.Devices.Bluetooth.GenericAttributeProfile namespace

Windows.Devices.Enumeration namespace


System requirements

Client: Windows 10 Anniversary Edition

Server: Windows Server 2016 Technical Preview

Phone: Windows 10 Anniversary Edition

Build the sample

  1. If you download the samples ZIP, be sure to unzip the entire archive, not just the folder with the sample you want to build.
  2. Start Microsoft Visual Studio and select File > Open > Project/Solution.
  3. Starting in the folder where you unzipped the samples, go to the Samples subfolder, then the subfolder for this specific sample, then the subfolder for your preferred language (C++, C#, or JavaScript). Double-click the Visual Studio Solution (.sln) file.
  4. Press Ctrl+Shift+B, or select Build > Build Solution.

Run the sample

The next steps depend on whether you just want to deploy the sample or you want to both deploy and run it.

Deploying the sample

  • Select Build > Deploy Solution.

Deploying and running the sample

  • To debug the sample and then run it, press F5 or select Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or selectDebug > Start Without Debugging.