The popularity of Bluetooth technology in the fields of earphones, mobile phones, watches and automobiles has brought a lot of convenience to people, but it has also caused some people's misunderstandings about Bluetooth. Today, Bluetooth powers a variety of important solutions, including home automation, indoor navigation, and commercial and industrial innovation.
Misunderstanding 1: The longest distance for stable Bluetooth transmission is 30 meters?
Many people have long believed that Bluetooth is only an effective short-range wireless connection technology, mainly because the most well-known applications such as audio and wearable devices are designed to meet the short-range transmission requirements, so developers generally Choose to use technology and hardware with a maximum transmission distance of 10 to 30 meters.
In fact, the stable and effective transmission distance between Bluetooth devices can reach more than 1 km, and even remotely control over-the-horizon (BVR) drones stably. Bluetooth solutions are generally customized for use, and many factors can affect their effective transmission distance, such as radio spectrum, transmit power, antenna gain, and path loss.
The variability of Bluetooth transmission distance makes it suitable for a variety of scenarios. Unlike other wireless technologies, Bluetooth is designed to support a wide range of achievable and reliable transmission ranges between two devices, giving developers the flexibility to create wireless solutions that best meet the needs of their target use cases.
Misunderstanding 2: Bluetooth cannot connect through the wall?

Assuming you're struggling to hear someone in the next room, the volume and clarity you hear will depend on the material used on the walls. But in either case, as long as the sound is loud enough, you can hear it clearly. The same goes for radio signals.
Path loss reduces the strength of airborne signals, which is a natural phenomenon and can be affected by environmental factors such as walls, windows, and other obstacles. But radio waves can pass through objects, even concrete walls and floors, which means that the range of a Bluetooth signal isn't limited to the room you're in. These obstructions affect the overall coverage of the signal, but do not block the signal.
Myth 3: Bluetooth is just a consumer technology?

Do you think that Bluetooth is just a consumer-facing technology? There is widespread misunderstanding of the commercial and industrial potential of Bluetooth technology. Over the past 20 years, Bluetooth has created and fostered hundreds of new global markets, the best known of which are audio transmission and short-range data transmission. While Bluetooth technology has become a feature of choice in headphones, fitness trackers and smartphones, this is just the tip of the iceberg of Bluetooth's many applications.
Many developers around the world are using Bluetooth technology to enable wireless connectivity over distances of more than one kilometer, and such connectivity is the basis for next-generation applications such as industrial asset tracking and large sensor networks.
The functions of Bluetooth are much richer than what we are familiar with. Its continuous innovation in consumer applications has improved the living standards of millions of people around the world, but it has also affected people's overall understanding of the scope of Bluetooth applications. In fact, Bluetooth has solved many commercial and industrial problems.