The latest low-power Bluetooth Communication protocol in Bluetooth 4.0 is promoting the development of a new battery-powered and portable system market. Designers expect this connection function in its new products and existing product lines to release powerful features of the Internet of Things and cloud services. However, increasing wireless functions in the product may be a challenge, and is especially difficult for those products that have been sent to the world and need to get global certified products. Designers are extremely headache to design such systems because they have to take up the development time of the core function of the system.
In view of the status of smartphones and tablets, Bluetooth has become a key communication technology. Intelligent Bluetooth is easy to see, which means that developers do not need to worry about creating separate gateways required to create other IOT wireless connections. Moreover, the APP running on your smartphone can be used to provide an interface to a heart rate monitor, a toy or remote control device. This Bluetooth connection also opens the gate of the Internet and cloud services to the developer, thereby achieving automatic collection and compilation of data, providing far super-target design or even smartphones.
Although this has become possible in the past, a new low-power Bluetooth (BLE) specification that belongs to Bluetooth 4.0 can make this connection easier to implement in the IOT node. Reduce power consumption Reduce battery load in nodes, and extend battery life in the terminal device for several months or even years. This has become a key driver that is adopted by this new specification, especially in the embedded market.
Where is the intelligent manifestation of smart Bluetooth?
In order to achieve lower power consumption, smart Bluetooth also uses the same 2.4 GHz ISM band as the previous traditional Bluetooth, but its packet is smaller, the link bit rate is 1 Mb / s and the application throughput when using 2 MHz channels. 100 kb / s. This makes this technology ideal for IoT applications, rather than large file transfer. However, the lower bit rate of the application can be compensated by shortening the delay from the traditional Bluetooth 100 ms to 3 ms to establish a connection faster, so that more monitoring applications can respond to data queries faster, achieve smaller The duty cycle, eventually reducing power consumption. The maximum transmit power has dropped to 10 mW, enough to meet short distance transmission requirements. All of these are designed with the antenna front end design of the Bluetooth module to make smart Bluetooth performance requirements match those application requirements.
Intelligent Bluetooth application
Intelligent Bluetooth is increasingly used in applications that are controlled by smartphones and acquire data within a period of time, such as portable heart rate gauges or sphygmomanners. This technique can be used for remote control, bicycle recorders, weighing devices, or a wide variety of motion and fitness sensors. It can limit the imagination of only designers of various opportunities, which can capture all these opportunities is an ubiquitous smartphone, tablet, and data connection with the cloud.
No matter what kind of application, you can easily connect more devices to larger networks with a battery to wirelessly connect to wireless connections in length and even a few years. Product designers can use discrete components - SOC, crystals, filters, antenna and other more components to achieve intelligent Bluetooth technology. However, especially in the application of small and medium production scale, a more cost-effective solution can be provided using a ready-made module. Various modules will reduce design work and shorten the product development time, and when these modules have been approved and certified by the Bluetooth qualification and certification of related radio regulators in their country, the results will be more satisfactory.
What is determined a good intelligent Bluetooth module design for IOT? Be
Whether it is for consumption, health applications or other applications, a good smart Bluetooth module that adapts to the IoT must be designed to be flexible and fast-to-market. For example, TAIYO Yudnzxx hardware can be connected to an existing master controller via the UART interface to easily add it to the design.
Put the latest NRF51822 Intelligent Bluetooth sheet (SOC) (provided by Nordic Semiconductor, Figure 1) with the optimized ceramic antenna on the Qualified Bluetooth module, the designer can be inserted into the smart Bluetooth function. The module is 9.6 x 12.9 x 2 mm (see Figure 2), therefore can be integrated into a variety of devices. Developers can use the software provided by Nordic Semiconductor, including specifications and demo applications approved through Bluetooth. Among them, demonstration applications include UART services, temperature sensors, proximity labels, beacons, and heart rate monitors.
The module contains a ceramic antenna and filter in the front-end radio implementation, and has obtained multi-country radio type certification, including US FCC, Canada IC RSS, and Japan, which can shorten the listing time of the final product.
It's time when it is different.
For new IOT or consumer design, 32-bit ARM Cortex-M0 kernel in NRF51822 can be used as the primary microcontroller. Although this requires running the BLE protocol stack, it has additional processing power and has alternate storage in 256 KB flash and 16 KB RAM, which can be used to run some smaller primary applications.
This is achieved by the module interface. The Eysfcnzxx module provides access paths for 29 I / O pins, some of which can be configured as SPI, I2C or UART interface, or configured to connect to 8/9/10, 6 channel analog-to-digital converters to make The sensor is directly connected to the module. This way, a simple design does not require external microcontrollers and memory, thereby reducing cost and space, making its products a place in the target market. This complete control capabilities of SOCs in the module core will make developers to get important advantages when designing overall system design.
in conclusion
New generation portable and networked household equipment will be used to use smart Bluetooth technology. With smartphones, tablets provide low-power Bluetooth 4.0 support for extensive new applications, designers can easily add exciting new features in many connected products.
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