Wi-Fi模块在物联网设计中的应用现状和未来优势
一个无处不在的物联网(物联网)取决于无线连接,但有许多选择无线,而不是每一个设备是IP寻址-物联网的必备功能。更重要的是,射频设计本质上是困难的。很少有公司配备适当的技能来实现射频和天线设计,甚至在完成时,保持最新的设计与最新的标准,并通过FCC遵守它是耗时的。
对于设计师来说,有一个非常坚实和行之有效的无线连接和物联网选项。该选项是Wi-Fi和模块的使用。此功能将解释原因,提供了一些设计方案,讨论即将到来的升级到IEEE 802.11协议,并展示了如何桥Zigbee Wi-Fi本地IP地址。
There are many wireless interface options, Bluetooth Low Energy (BLE), ZigBee, Z-Wave, Wi-Fi and RFID, each with their own unique balance of power, range, data rates, mesh networking, interference immunity, and ease of use. However, some interfaces are not yet native-IP enabled, so cannot be addressed directly or exchange data with other devices and servers over the Internet. These then require a separate gateway, adding expense and complexity to the final solution.
This is where Wi-Fi stands out: it is based on the IEEE 802.11 standards with native IP addressability, is ubiquitous, well understood, and can scale well in terms of data rates to optimize for power consumption. According to the Wi-Fi Alliance, there are more than 6.8 billion installed Wi-Fi-capable devices, so the odds are pretty high that there is a local Wi-Fi access point available (Figure 1)。 Note too that 802.11 standards are also IPv6 compliant, so there’s almost no limit to the number of unique addresses.
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