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Bluetooth or WLAN - What do I choose?

One wireless technology cannot cater for all application requirements. The standardized wireless technologies — WLAN, Classic Bluetooth and Bluetooth Low Energy — are good at different things

WLAN

WLAN (also commonly referred to as WiFi) is the most widely used wireless standard. It is often used for production planning and data acquisition as well as applications where rapid roaming is required. It provides very high data throughput but it is more vulnerable to interference than Bluetooth.

 

Bluetooth®

Bluetooth is often used for Human Machine Interfaces (HMI), programming, service/maintenance and real-time control tasks. It has a narrow band frequency spectrum which, together with functionality such as: Adaptive Frequency Hopping (AFH), makes it less sensitive to disturbances.

 

During the last few years, other technologies like Bluetooth Low Energy technology have become increasingly used for sensors, actuators and other small, often battery-driven, devices that need to be interconnected.

Compare the technologies

  Bluetooth
technology

WLAN (WiFi)
technology
Bluetooth
Low Energy

Data throughput +/- ++ -
Robustness ++ +/-
++
Range 10 - 300 m  50 - 300 m
10 - 250 m
Local system density ++ -
++
Roaming  + 
++
N/A
Large scale network
-
+/-
+
Low latency +++ +/-
++
Connection set-up speed - +/- ++
Power consumption + -  +++
Cost + - ++

Caption: The table offers a quick overview of the differences between the wireless technologies.
+ = Good
++ = Strong
+++ = Very strong
+/- = Average
- = Weak

Whitepaper - Download

Best practices for choosing the wireless technology for your application

The increasing numbers of wireless installations in various industrial applications areas proves that wireless communication is reliable and trustful. Today, when starting the implementation of Industry 4.0 /Internet of Things (IoT) solutions there are a number of new use cases coming up.

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whitepaper

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  • Bluetooth & Wlan
  • Wireless differences

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