可穿戴平臺簡化物聯(lián)網(wǎng)設(shè)備樣機

　　從歷史上看，可穿戴式設(shè)計很難被原型化。核心問題是規(guī)模問題。最現(xiàn)成的開發(fā)板和系統(tǒng)是專為臺式環(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簡單的PCB生產(chǎn)線提供低成本的開發(fā)支持。相對較大的板房地產(chǎn)也支持傳統(tǒng)的擴展頭連接器。大針的大小和間距對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擴展。

　　雖然可以使用臺式型發(fā)展的系統(tǒng)，可以執(zhí)行一個可穿戴功能的高功能的系統(tǒng)，它不能對一個系統(tǒng)，試用者和早期采用者可以使用像是一個真正的產(chǎn)品需要。當(dāng)涉及到可用性和其他重要的戲劇測試和實驗時，一個不舒適和笨重的健身可穿戴將功虧一簣。所需要的是一個提供大多數(shù)傳統(tǒng)開發(fā)板的靈活性的平臺，但對于可穿戴設(shè)備設(shè)計來說，這是一個有意義的因素。

　　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）.