With the advent of the Bluetooth Mesh network, the Internet of Things connection has become more diversified. No wireless protocol is perfect for IoT wireless connections. We can only continuously integrate and extract the best wireless protocols. The advantages of mesh networks reflect the future of IoT wireless connectivity.
The demand for multi-protocol, multi-band solutions will continue to grow in the future, with IoT engineers having enough flexibility to handle multiple applications through multiple wireless standard protocols in a highly integrated SoC chip.
“No wireless protocol is perfect for all IoT applications.†So the demand for multi-protocol, multi-band solutions will continue to grow in the future, with multiple wireless in a highly integrated SoC chip. With standard protocols, IoT engineers have the flexibility to handle a wide range of applications.
Mainstream companies in the industry have launched such multi-protocol products, such as Silicon Labs' Wireless Gecko, NXP's KW41, Texas Instruments' C2560 series, Qorvo's GP695, etc., all aimed at this demand. The birth of these products gives engineers a more flexible choice.
In the middle of this year, the Bluetooth SIG announced the arrival of the "Bluetooth Mesh Network". The connection and application scenarios of the Internet of Things have become more and more, and the number of nodes of the Internet of Things is increasing. Silicon Labs offers ultra-small Bluetooth system-in-package (SiP) modules and multi-protocol SoCs that support low-power Bluetooth (BLE) and Bluetooth mesh connections.
̇ Extend the connection range of the gateway or mobile device by using the multi-hop (mulTI-hop) communication range of the route;
̇ Reduce device transmission spacing and achieve better power consumption;
æ”¯æŒ Support more than 100 devices in a single subnet to increase system size;
解决Resolve node failures with self-healing networks to improve system reliability;
̇ Use the communication between devices to provide the best responsiveness.
Recently, Silicon Labs held a small media meeting in Shenzhen. Chen Xiongji, senior marketing manager of the company's Asia-Pacific region, shared the Wireless Gecko SOC and dynamic multi-protocol software with the reporter of Electronic Technology Design (EDN) China.
Cost and size reduction
This multi-protocol solution can greatly reduce the additional complexity and hardware cost of the two-chip architecture. Chen Xiongji pointed out that the integrated single-chip solution can compare the bill of materials (BOM) cost of the wireless subsystem with two independent chips. Reduced size by 40%.
In addition, simplifying software development, improving product lifecycle management, and accelerating time to market are also significant advantages.
Up to 20dbm output
Chen Xiongji pointed out that the power of mainstream transceivers is not as high as 20dbm, and Silicon Labs is the first to achieve such high power. In addition, the industry transceiver generally needs 150~200mA current, while Silicon Labs only needs z&20dbm, and accepts sensitivity, such as ZigBee reaches -101dbm.
Mobile APP direct deployment
Dynamic multi-protocol software allows users to deploy, update, control and monitor ZigBee mesh networks directly via Bluetooth using a smartphone app.
The software can also extend ZigBee-based connectable lighting and building automation systems with Bluetooth beacons, making it easier to deploy a scalable indoor location-based service infrastructure. By adding Bluetooth low energy to the ZigBee mesh network, developers can create next-generation IoT applications that are easier to deploy, use, and update.
Dynamic Multi-Protocol Scheduled by Silicon Labs
Any multi-protocol solution must address the question of how to share a radio with a time-sharing mechanism to run multiple wireless protocols simultaneously on a single chip. - Just like the traffic light mechanism to determine that a certain time period is run by a protocol.
At this time, no OS is difficult to implement. Silicon Labs rewrote the original protocol, prioritizing the assignments with Micrium OS, and configuring differently at different time intervals. This supports ZigBee routing, Bluetooth connectivity and Bluetooth beacons, and the connection interval is configurable for optimal communication quality.
Micrium, an RTOS vendor acquired by Silicon Labs last year, has become the market-highest software for paid μCOS in the past 10 years.
Safety and stability
There was a very popular saying in China before: "Most of the IoT devices are streaking." The security of IoT devices has gradually gained widespread attention. Chen Xiongji said, "The mesh network has different protocols and standards. Bluetooth Mesh has security requirements at both the application layer and the network layer." Wireless Gecko has added a number of secure algorithms, including many SoCs supporting AES128/256, and ECC. Different security algorithms.
Finally, it is worth mentioning that Silicon Labs has launched a full suite of software and hardware that supports the latest Bluetooth mesh network specifications. Compared to existing development tools, the combination of a patented network analysis tool and a smartphone Bluetooth mesh protocol stack helps IoT developers reduce time-to-market for up to six months.
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