What parameters should be paid attention to when using Bluetooth devices

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What parameters should be paid attention to when using Bluetooth devices [Copy link]

In our lives, we often buy devices related to Bluetooth functions, such as headphones, speaker receivers, etc., but many friends know very little about Bluetooth. I don’t know what parameters you should look at when choosing a Bluetooth device. After reading this popular science post, you will understand! What parameters should be looked at when choosing a Bluetooth device 1. Bluetooth version 2. Bluetooth protocol Different Bluetooth protocols determine what functions the device can have. The more protocols it supports, the more comprehensive the functions. 3. Maximum output power, the larger the sound, the louder it is. 4. Total harmonic distortion, the smaller the better. 5. Signal-to-noise ratio, the larger the better. In short, just look at these parameters, and you can roughly judge whether the product really meets your requirements. Let me tell you the differences between various versions of Bluetooth: Bluetooth 1.0: The transmission rate is about 1M/s. Bluetooth 2.0+EDR: The transmission rate is about 2-3M/s, of which 2.1+EDR is the most classic Bluetooth, and its biggest feature is safe and easy pairing. Bluetooth 3.0+HS (High Transmission Bluetooth): High transmission of 24M/s. Only devices marked with the "+HS" trademark truly support 802.11 high-speed data transmission. Bluetooth 4.0 (Low Power Bluetooth): It includes classic Bluetooth, high-speed Bluetooth and Bluetooth low-power protocols. It has lower power consumption based on 3.0 and is mainly aimed at applications with extremely low power requirements and powered by button batteries. Among them, 4.1 adds the characteristics of the Internet of Things and supports the coexistence of batch data exchange rates. The biggest feature of 4.2 is that it allows multiple Bluetooth smart devices to access the local area network or the Internet through one terminal. At present, the most widely used version on the market is 4.1. The introduction of this technology has made a leap forward in the application of the Internet of Things, such as smart homes, smart wearable devices, and smart medical care.