? From 1.0 to 5.3, what are the features of each version of the Bluetooth protocol?

As a small-scale wireless connection technology, Bluetooth has the characteristics of low power consumption, low cost, and convenience. It is widely used in scenarios such as wireless earphones, smart watches, and wireless remote controls. It is one of the mainstream technologies for wireless communication. Since the first Bluetooth version was born in 1999, Bluetooth technology has been developed for more than 20 years. From Bluetooth 1.0 to Bluetooth 5.3, what functions have been upgraded by the constantly updated Bluetooth protocol? Bluetooth 1.0 Bluetooth Module The transmission rate is 748~810kpbs, simplex transmission, the communication is easily disturbed, and it is difficult to distinguish the primary and secondary equipment.Bluetooth 1.1 The transmission rate is 748~810kpbs, and it can only work in the simplex transmission mode, which is easily interfered by the communication of the same frequency products, and the main and auxiliary equipment can be distinguished. This version supports the transmission requirements of Stereo audio effects, but parameters such as bandwidth, frequency, and response time do not meet the requirements, and it is not the best protocol for Stereo transmission.Bluetooth 1.2 The transmission rate has not changed. Based on the Bluetooth version 1.1, the anti-interference frequency hopping function has been added to support single-channel playback, but the performance is still not ideal.Bluetooth 2.0 Bluetooth 2.0 is an optimized and upgraded version of 1.2, and the transmission rate can reach about 2Mpbs. This version of the Bluetooth module can realize full-duplex working mode, and can transmit voice information while transmitting files, and carry out real-time two-way communication. The power consumption is relatively reduced, and stereo sound is supported.Bluetooth 2.1 This version of the Bluetooth module has a pairing and near field communication NFC (Near Field CoMMunication) mechanism between mobile phones; Sniff Subrating function: It can realize the setting of the confirmation data transmission interval between two devices. When we extend this time interval, the power consumption of the Bluetooth chip can be reduced.modbus tcp gateway This version of the Bluetooth protocol supports full-duplex communication mode, and data can realize real-time two-way interaction.Bluetooth 3.0 Using a new protocol, the transmission rate can reach 24Mbps, which is greatly improved on the basis of Bluetooth 2.0, and supports video transmission.Bluetooth 4.0 Achieve extreme low power consumption; low cost, low latency, can achieve a low latency of 3ms, and AES-128 encryption, to achieve high security under the premise of ensuring performance. The device can be multi-connected, and theoretically it can achieve a distance transmission of 100 meters. Bluetooth versions after 4.0 belong to Bluetooth Low Energy.