Bluetooth is a wireless communication technology used for short-range data transmission between devices. It uses radio waves in the 2.4 GHz band and is suitable for connections between smartphones, headphones, smartwatches, computers, and other devices.

 

Main features of Bluetooth:

• Wireless connection → No cable required, short range (usually up to 10 meters, depending on the class).
• Low energy consumption → Especially with Bluetooth Low Energy (BLE) for IoT devices.
• Different transfer rates → Depending on version and application.
• Versatile use → audio, file transfer, peripherals (mouse, keyboard), IoT.
• Security through encryption → PINs and keys protect against unauthorized access.

 

Bluetooth versions & range:

• Bluetooth 1.0 – 3.0 → Older versions with slower speeds (up to 3 Mbps).
• Bluetooth 4.0 – 4.2 → Introduction of Bluetooth Low Energy (BLE) for lower energy consumption.
• Bluetooth 5.0 – 5.3 → Improved range (up to 200 meters), higher speeds (up to 50 Mbps) and more stable connections.

Bluetooth is often compared to WiFi :

• Bluetooth is intended for short distances and small amounts of data (e.g. audio, sensors).
• WiFi is suitable for high data rates and longer ranges (e.g. internet access, streaming).