I believe that some people have had such a question when they understand Bluetooth. Is Bluetooth 4.0 and Bluetooth low-powered the same thing? This statement is wrong and is an absolute misunderstanding of Bluetooth 4.0. The Bluetooth 4.0 standard includes two Bluetooth standards: one is a dual-mode standard that includes traditional Bluetooth (or classic Bluetooth), high-speed Bluetooth, and low-power Bluetooth; the other is a separate low-power standard. These two parts are suitable for different application conditions and application environments. Traditional Bluetooth (or classic Bluetooth) can be used for large data transmission, such as voice, music, etc., while low-power Bluetooth is mainly used in products with higher real-time requirements but relatively low data rates, such as sensing. Data transmission and remote control device of the device. Traditional Bluetooth has three power levels: Class1, Class2, and Class3, which support transmission distances of 100m, 10m, and 1m, respectively, while low-power Bluetooth is power-free, and the general transmission power is -2~5dBm (user can use software). Programming settings), for the Bluetooth 4.2 and above standards, the transmission distance is more than 100m under open conditions is no problem. So Bluetooth 4.0 is a combination of traditional Bluetooth, high-speed Bluetooth and low-power Bluetooth, not just low-power Bluetooth. About low power Bluetooth Low-power Bluetooth, also known as smart Bluetooth, is an intelligent, low-power wireless technology. This technology further enhances its intelligence by reducing the size of smart devices and reducing their price and complexity. Low-power Bluetooth was originally part of the Bluetooth 4.0 core specification, with the initial goal of providing the lowest power wireless standard and optimized for low cost, low bandwidth and low power. At present, low-power Bluetooth technology has been widely used and can be operated for a long time with only one button battery. Low-power Bluetooth and other Bluetooth compatibility diagram The low-power Bluetooth solution solves the communication between mobile phones and mobile devices, and can transfer relevant data to the cloud for storage, and can also expand and implement more value-added services. *HY254124PA module* adopts TI CC2541 high integration single mode Bluetooth BLE 4.0 chip, the module can work under the master/slave/master-slave switching role, the module will automatically broadcast after the initial setting, the mobile phone with the specific APP will be After scanning and docking, it can be monitored by the BLE protocol. At the same time, the built-in FLASH program memory is suitable for customized applications to better protect application security. General characteristics: Product model: HY-254124PA Wireless standard: Bluetooth 4.0 BLE protocol Size: 25.1*12*2.04mm Communication interface: UART/SPI/IIC Transmitting power: +15dBm (the antenna output is connected to the RF coaxial line for direct testing) Power control range: 20dB (can be programmed by software) Receive sensitivity: -94dBm (using CC2541 high gain receiving sensitivity) Antenna type: soft antenna Transmission distance: 110 meters (the actual distance is subject to the test environment) Working voltage: 2.0-3.6V DC Working mode: Host mode / Slave mode / Broadcast mode (Beacon) Secondary development: support customer secondary development, provide SDK tools
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