物聯(lián)網(wǎng)的快速增長(zhǎng)元素是無線傳感器。這些設(shè)備的眼睛和耳朵的物聯(lián)網(wǎng)，并提供大量的數(shù)據(jù)，分析和大數(shù)據(jù)應(yīng)用程序需要作出明智的決定。在工業(yè)應(yīng)用中，傳感器可以提供準(zhǔn)確的數(shù)據(jù)，優(yōu)化化學(xué)處理和材料傳輸，支持更高水平的自動(dòng)化，提高能源網(wǎng)格效率，使主機(jī)的其他應(yīng)用程序尚未交付。

　　MCUs將在無線傳感器應(yīng)用的心臟。新的設(shè)備，簡(jiǎn)化了無線傳感器連接的實(shí)現(xiàn)使得它比以往任何時(shí)候都更容易添加這些功能，即使是最謙虛的價(jià)格體系。本文將看看這些新設(shè)備提供的一些實(shí)現(xiàn)選項(xiàng)，來說明將數(shù)據(jù)從MCU遷移到云中是多么容易。

　　Wireless MCUs come online

　　Recently introduced MCUs are adding integrated wireless communications functions that can connect to a wide variety of wireless standards. These new devices take one of two common approaches to implementing wireless communications. Some devices use a flexible wireless subsystem that can implement a variety of standards. Other devices focus on one or two common and similar standards to optimize their solution for specific applications.

　　Flexible implementation often provides a programmable radio “front end” that manages all of the generic wireless “building blocks，” such as modulation options， that include Gaussian frequency-shift keying （GFSK）， frequency-shift keying （FSK）， four-level GFSK （4GFSK）， four-level FSK （4FSK）， and on-off keying （OOK）。 Other common hardware blocks include low-noise amplifiers， mixers， programmable gain amplifiers， an analog-to-digital converter， a digital signal processor and packet-handling logic， and FIFO storage. These wireless building blocks can be used， via MCU software， to implement a variety of radio-based standards. Often the MCU manufacturer provides high-level applications programming interfaces （APIs） that implement common standards to simplify development.