在許多物聯(lián)網(wǎng)應(yīng)用中，設(shè)計(jì)者越來(lái)越需要能夠在較長(zhǎng)的范圍內(nèi)工作，但功耗更低的設(shè)備。通常情況下，這將需要匹配的低功耗單片機(jī)收發(fā)器并發(fā)展合適的協(xié)議棧。幸運(yùn)的是，新的解決方案大大減少甚至消除了額外的工作，加快了上市時(shí)間，降低了成本。

　　山姆R30從微芯片技術(shù)是一個(gè)解決方案，消除了這些詳細(xì)的開(kāi)發(fā)步驟的單一封裝中提供MCU和收發(fā)器的優(yōu)化整合的一個(gè)例子。用于微芯片的MIWI協(xié)議棧結(jié)合，山姆R30提供解決方案的低功耗近滴，遠(yuǎn)程無(wú)線(xiàn)物聯(lián)網(wǎng)設(shè)計(jì)。

　　本文將討論山姆R30的關(guān)鍵屬性和開(kāi)發(fā)者如何啟動(dòng)和運(yùn)行它，快。

　　Long-range IoT challenges

　　Long-range applications go well beyond those supported with more common wireless technologies such as Bluetooth or Wi-Fi. Also， these deployments carry a related requirement for multi-year battery life due to physical placement constraints or limited maintenance capabilities.

　　MCUs based on the 32-bit， ARM? Cortex?-M0+ core are typically relied upon to address the processing end of applications due to their combination of low power and high performance. By pairing these MCUs with sub-GHz transceivers， developers can create a solid foundation for IoT designs capable of operating over much longer ranges than practical with 2.5 GHz Bluetooth or Wi-Fi devices. For developers， however， integrating these devices into a low-power， long-range wireless solution can present multiple challenges.

　　At the hardware level， engineers must deal with sources of interference， such as switching noise， while maximizing processor performance and transceiver power output. In creating suitable software， engineers can also find themselves forced to develop low-level hardware abstraction layers needed for device support， protocol stacks， and IoT services.