This article is part of our series about [Bluetooth](/performance/system integration) Low Energy. You can find the comprehensive guide here: The ultimate guide to [BLE](/services/system integration) App Development in Germany (2026)

BLE vs. Classic Bluetooth: The right choice for your IoT project

When talking about "Bluetooth", most people mean a single technology. In fact, behind the name is a brand family with two main variants: Classic Bluetooth (Official BR/EDR for Basic Rate/Enhanced Data Rate) and Bluetooth Low Energy (BLE). Although both run under the same brand and are managed by the same standard, they are designed for fundamentally different purposes. For developers and product managers in the IoT sector, understanding these differences is crucial for the success of a project. The wrong choice can lead to poor performance, short battery life and unsatisfied customers.

The decisive difference: Energy consumption

As the name says, the main advantage of Bluetooth Low Energy is extremely low energy consumption. BLE is designed to run for months or even years with a single small button cell. This is achieved by keeping the device in a deep sleep mode most of the time and only awakening for very short periods of time to send or receive small data packets.

Classic Bluetooth is optimized for a continuous, data-intensive connection. It consumes significantly more energy and is therefore dependent on devices with larger batteries and regular charging cycles, such as wireless headphones or loudspeakers.

Data rate and application cases

The different design in energy consumption is reflected directly in the possible data rate and the typical applications:

Classic Bluetooth (BR/EDR)

High data rate (up to 3 Mbit/s): Ideal for applications requiring a constant data stream.
Applications: The most famous example is audio streaming. If you stream music on wireless headphones or a Bluetooth speaker, use Classic Bluetooth. It is also the right choice for transferring larger files or for wireless keyboards that require a low latency.

Bluetooth Low Energy (BLE)

Slower data rate (up to 2 Mbit/s): Optimized for the transmission of small, periodic data packets.
Applications: Here is the domain of the Internet of Things. Fitness trackers that send heart rate data, thermometers that transmit room temperature, or BLE beacons that send out their identification – all these devices only occasionally send small amounts of information. BLE is perfect for sensor data, status updates and simple control commands.

connection structure and latency

Significant U

BLE vs. Classic Bluetooth: The right choice for your...