可穿戴平臺(tái)簡(jiǎn)化物聯(lián)網(wǎng)設(shè)備樣機(jī)

　　從歷史上看，可穿戴式設(shè)計(jì)很難被原型化。核心問(wèn)題是規(guī)模問(wèn)題。最現(xiàn)成的開(kāi)發(fā)板和系統(tǒng)是專(zhuān)為臺(tái)式環(huán)境，體積和重量都不重要。

　　更大的電路板尺寸使得制造商很容易使用相對(duì)簡(jiǎn)單的PCB生產(chǎn)線提供低成本的開(kāi)發(fā)支持。相對(duì)較大的板房地產(chǎn)也支持傳統(tǒng)的擴(kuò)展頭連接器。大針的大小和間距對(duì)這些頭連接器可以很容易地使用一次性的面包板和非常低的成本生產(chǎn)原型服務(wù)定制I/O擴(kuò)展。

　　雖然可以使用臺(tái)式型發(fā)展的系統(tǒng)，可以執(zhí)行一個(gè)可穿戴功能的高功能的系統(tǒng)，它不能對(duì)一個(gè)系統(tǒng)，試用者和早期采用者可以使用像是一個(gè)真正的產(chǎn)品需要。當(dāng)涉及到可用性和其他重要的戲劇測(cè)試和實(shí)驗(yàn)時(shí)，一個(gè)不舒適和笨重的健身可穿戴將功虧一簣。所需要的是一個(gè)提供大多數(shù)傳統(tǒng)開(kāi)發(fā)板的靈活性的平臺(tái)，但對(duì)于可穿戴設(shè)備設(shè)計(jì)來(lái)說(shuō)，這是一個(gè)有意義的因素。

　　Platforms such as MikroElektronika’s Hexiwear provide a way of building applications and testing them in a realistic user environment. At its core， the Hexiwear platform provides an integrated MCU and peripheral solution in wearable form supported by an open-source development environment. More importantly， it is packaged in the form factor of a compact hexagonal module that can easily be attached to a wristband for use as an IoT-enabled smartwatch. Alternatively， it can be fitted into a pendant ring for use as a brooch or for integration into items of clothing.

　　The form factor also suits uses in the wider smart home environment where it can be deployed as a removable element in a wall-mounted module or larger mechanical system. Smart home focused projects that have been based on Hexiwear include a smart bathroom scale that transmits the measured weight to the user’s smartphone， a doorbell with the ability to report activity to homeowners remotely and display custom messages to visitors， and a smart refrigerator magnet able to report the internal temperature to users on the Hexiwear’s display.

　　The Hexiwear platform is based on a Kinetis K64F MCU featuring an ARM? Cortex?-M4 core running at up to 120 MHz， supported by numerous peripherals including ADCs， a DAC， timers， and serial interfaces （Figure 1）.