I understand what is low-power Bluetooth

Bluetooth technology has changed the wireless communication between devices by virtue of its versatility and simplicity. The device provides highly secure wireless communication via Bluetooth. Due to its low power consumption and low cost, Bluetooth plays a vital role in the development of applications ranging from high-speed automotive equipment to complex medical equipment.

Bluetooth's convenience and global acceptance allow any Bluetooth-enabled device to connect to other nearby devices through a pairing process. The paired device establishes full-duplex communication and transmits data and voice over a short-range private network called a "piconet." A piconet can connect up to eight devices, one of which acts as the master and the other acts as a slave in the network/piconet. The master device acts as a hub, and the slave devices communicate with each other through the master device. Another important feature of Bluetooth technology is the use of frequency hopping to reduce the effects of interference.

Bluetooth technology Full-duplex communication capabilities provide users with innovative features such as connecting a mobile phone to a Bluetooth speaker, hands-free phone while driving, sharing files between two laptops, and connecting a game console to a Bluetooth-enabled game controller.

Bluetooth low energy:

Low-power Bluetooth is an intelligent, low-power Bluetooth wireless technology. This technology further enhances its intelligence by reducing the size and cost of smart devices.

Low-power Bluetooth, also known as Smart Bluetooth, was originally part of the Bluetooth 4.0 core specification. Before being adopted by the Bluetooth Technology Alliance, it was a short-range wireless communication technology designed by Nokia. Its initial goal was to provide the lowest power wireless standard, and it was designed to be low cost, low bandwidth, low power and low. The complexity is optimized. These design goals are emerging in the core specification: Low-power Bluetooth is working to become a low-power standard designed for semiconductor manufacturers and low-power, low-cost practical applications. At present, low-power Bluetooth technology has been widely used and can be operated for a long time with only one button battery.

Although Bluetooth Low Energy itself is an excellent technology, the reason for its widespread adoption is that the technology makes the right compromise at the right time. Although it is a relatively new standard, the number of products that have been added to Bluetooth technology has far exceeded the number of products of other wireless technologies at the same stage.

The challenge of traditional Bluetooth is that the battery is quickly depleted and the number of disconnections is frequent, so frequent repeated pairing is required. Low-power Bluetooth has successfully solved these problems, and this is one of the reasons why this technology can develop rapidly. The rapid development of smartphones, tablets and mobile computer devices has further promoted the popularity of this technology. The mobile industry giant's aggressive adoption of low-power Bluetooth has opened the way to the popularity of this technology, which in turn has prompted semiconductor manufacturers to devote their limited resources to the technology that they believe is most likely to thrive in the long term.

As the mobile device and tablet market matures, the connection between the outside world and these devices creates tremendous growth potential. This is a great opportunity for peripheral vendors to develop innovative devices that address issues that consumers don't even realize today. As a result, low-power Bluetooth brings together many advantages, creating opportunities for flexible small product designers to enter the big market with specific features, creative and innovative products with a relatively low design budget. Low-power Bluetooth also enables these developers to design products that communicate with any advanced mobile platform today using readily available chips, tools and standards.

characteristic

1. Lowest power consumption

From shape design to usage, everything is designed with the lowest power consumption. To reduce power consumption, Bluetooth low energy devices spend most of their time in sleep mode. When an activity occurs, the device is automatically woken up and sends a text message to the gateway, PC or smartphone. The maximum/peak power consumption is no more than 15 mA and the average power consumption is approximately 1 microamp. The power consumption during use is reduced to one-tenth of that of traditional Bluetooth. In a less used application, a button cell can maintain stable operation for 5 to 10 years.

2. Cost-effective and compatible

To be compatible with traditional Bluetooth technology and cost-effective for small battery-powered devices, there are two chipsets to choose from:

Dual-mode technology with low-power Bluetooth technology and traditional Bluetooth capabilities.

Pure low-power Bluetooth technology optimized for small battery-powered devices with low cost and low power consumption

3. Stability, safety and reliability

Low-power Bluetooth technology uses the same adaptive frequency hopping (AFH) technology as traditional Bluetooth technology, ensuring low-power Bluetooth to maintain stable transmission in “noisy” RF environments in residential, industrial and medical applications. To minimize the cost and power consumption of using AFH, Bluetooth low energy technology has reduced the number of channels from 79 1 MHz wide channels of traditional Bluetooth technology to 40 2 MHz wide channels.

4. Wireless coexistence

Bluetooth technology, wireless LAN, IEEE 802.15.4/wireless personal area networks, and many proprietary radios use the 2.4 GHz Industrial Scientific Medical (ISM) band without authentication. Due to the excessive number of technologies sharing this radio wave space, wireless performance may be degraded due to error correction and repeated transmission caused by interference (eg, increased delay time and reduced throughput). In demanding applications, interference can be reduced through frequency planning and special antenna designs. Since both traditional Bluetooth and Bluetooth low energy use AFH, a technology that minimizes interference from other radio technologies, Bluetooth transmission has excellent stability and reliability.

5. Connection range

The modulation of Bluetooth low energy technology is slightly different from traditional Bluetooth technology. This different modulation achieves a connection range of up to 300 meters with a 10 mW decibel wireless chipset (low power Bluetooth maximum power).

6. Ease of use and integration

A low-power Bluetooth piconet is typically based on a master connected to multiple slaves. In a piconet, all devices are either master or slave, but cannot be master and slave at the same time. The master device controls the communication frequency of the slave device, while the slave device can only communicate according to the requirements of the master device. A new feature added to Bluetooth low energy technology is the "broadcast" feature compared to traditional Bluetooth technology. With this feature, the slave can tell it that it needs to send data to the master. Broadcast messages also include activity or measurements.

technical details

Data Transfer – Low-power Bluetooth supports very small packets (8 octets to 27 octets) that are transmitted at 1 Mbps. All connections use advanced low-power listening mode for ultra-low duty cycles to minimize power consumption.

Frequency Hopping – Low Power Bluetooth uses Bluetooth technology's universal adaptive frequency hopping technology to minimize other technical interference in the 2.4 GHz ISM band. Efficient multipathing advantages increase link budget and effective operating range while optimizing power consumption.

Host Control – Low-power Bluetooth has intelligent control. The host can be in sleep mode for a long time and will only be woken up by the controller when the host needs to execute. The maximum power savings are achieved because the host processor typically consumes more power than the low-power Bluetooth controller.

Delay – Low-power Bluetooth supports connection settings and data transfer within 3 milliseconds. Thus, in short burst communications, an application can establish a connection and transmit authenticated data within a few milliseconds and then quickly disconnect.

Distance – The increase in the modulation index allows the maximum distance of Bluetooth low energy to reach more than 100 meters.

Stability – Low-power Bluetooth uses a powerful 24-bit CRC on all packets to ensure optimal interference immunity.

Powerful network security – Provides robust packet encryption and authentication using CCM's complete AES-128 encryption technology to ensure secure communications.

Topology – BLE uses a 32-bit access address on each packet of a slave device, allowing it to connect to billions of devices. This technology is optimized for one-to-one connections and will use a star topology for one-to-many connections.

Comparison between traditional Bluetooth and Bluetooth low energy

application

Because almost all portable devices support BLE, it can be applied to a variety of new applications in a variety of industries. For example, at the show, BLE will help companies win new customers more effectively in the following ways:

Games – By rewarding show visitors with low-power Bluetooth technology to find Beacons that are placed in certain locations, exhibitors can attract these viewers to take the initiative to go to those areas where they are cold.

Sponsorship – Pushing notices to exhibitors through Beacon encourages them to view nearby booths as they pass through specific areas of the show, which can be an advanced service to sponsors for additional revenue.

Heat Map – Beacon can obtain real-time statistics, identify hotspots, and notify the event manager that there are too many people to potentially create a security risk.

Content Publishing – Participants no longer have to wait for emails to get meeting slides. BLE Beacon beacons can automatically send slides, e-books, and other materials to attendees and immediately during or after the meeting.

Automatic check-in - Event organizers set up Beacon, which simulates sign-in at the entrance of the venue, to easily get information about the number of participants in the event or show and view their profile in real time. Users do not need to be present. If the user downloads the app and launches Bluetooth on their mobile device, the app will automatically sign in as soon as the user walks into the venue.

Low-power Bluetooth has a mature ecosystem. Developers have access to a variety of chips and modules that accelerate the development of BLE device hardware and software.

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