發(fā)展與LoRa率低，長距離的物聯(lián)網(wǎng)應用

　　設計師們有各種各樣的無線技術來連接一個產(chǎn)品到物聯(lián)網(wǎng)（物聯(lián)網(wǎng)）。每種技術都適用于不同的應用程序，要求設計者仔細考慮范圍和數(shù)據(jù)速率、成本、功耗、體積和形狀因子等因素。

　　本文將介紹LoRa方案，比較其優(yōu)勢的其他協(xié)議，并討論了幾種產(chǎn)品和開發(fā)工具，使工程師能夠快速上手開發(fā)基于LoRa系統(tǒng)。

　　無線物聯(lián)網(wǎng)權衡考慮

　　每種無線技術都有其優(yōu)點和缺點。例如，標準的Wi-Fi可以高速傳輸大量數(shù)據(jù)，但它的范圍有限。蜂窩網(wǎng)絡結合了高速和長距離，但它是耗電的。

　　IoT applications such as remote data acquisition， urban lighting control， weather monitoring， and agriculture， each have a different set of priorities. The quantities being measured or controlled in these applications such as weather conditions， soil moisture levels， or streetlights， all change very slowly over an extended period of time.

　　In addition， the sensor nodes are often miles apart and are battery powered， so the optimum wireless protocol must be able to send small data packets efficiently over long distances with minimum power consumption. The LoRa protocol was designed for exactly these requirements.