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What are the categories of Bluetooth modules and what are the specific attributes and characteristics?

The smallest ARM processor with the lowest power consumption The code density and energy efficiency advantages of the Cortex-M0 mean it is a natural cost-effective replacement for 8/16-bit devices AC-DC одноканальный

AC-DC двойной in a variety of applications, while retaining the tools of the feature-rich Cortex-M3 processor and binary upward compatibility

Offers higher performance and richer functionality Introduced in 2004, recently updated with new technology and updated for configurability, the Cortex-M3 is designed for microcontroller applications

3. The difference between BLE Bluetooth module 5.0 protocol and 4.2 protocol

1. BLE wireless transmission protocol 5.0 vs 4.2

A: 【Transmission rate increased by 2 times】 The Bluetooth 5.0 protocol has increased the current transmission speed by 2 times. The maximum communication speed of the Bluetooth module 4.2 protocol is 1Mbps, while the maximum communication speed of the Bluetooth module 5.0 transmission protocol is 2Mbps.

B: 【Transmission distance increased by 4 times】 The coverage area of ​​the Bluetooth 5 standard is 4 times that of the Bluetooth 4.2 transmission. Improve indoor positioning accuracy.

C: [Broadcast mode information capacity increased by 8 times] Its broadcast communication capacity is upgraded from 31Byte of Bluetooth 4.2 to 255Byte, the enhanced broadcast capability will bring better beacons to create more location-based indoor positioning services and navigation service, data transmission can be realized without pairing and connection, the accuracy of indoor positioning is less than 1 meter,

D: [Lower power consumption and compatible with the old Bluetooth module version] In order to meet the needs of the mobile Internet of Things, it has lower power consumption and is compatible with the old Bluetooth version.

2. Bluetooth V4.2 vs 4.0

A: [Faster data transmission speed] Compared with 4.0, under the Bluetooth 4.2 standard, the data transmission speed between devices is increased by about 2.5 times, and the amount of data that a Bluetooth smart data packet can hold is about 10 times that of the previous one.

B: [Higher security] In addition, the security of Bluetooth 4.2 has also been improved. If the user's permission is not obtained, the Bluetooth signal will not be able to try to connect and track the user's device, and it will not be able to perform intelligent positioning.

C: [More powerful functions] On the other hand, the new standard also promotes the process of introducing the IPv6 protocol into the Bluetooth standard. Bluetooth 4.2 devices can directly access the Internet through IPv6 and 6LoWPAN, and support low-power IP connections.