如何使用Sigfox技術連接到物聯網

　　物聯網的最重要的挑戰之一是能夠輕松地添加無線傳感器節點和成本效益。無線鏈路需要低功耗，使節點可以運行在一個單一的硬幣細胞多年，但有一個長期的范圍，使成千上萬的節點可以連接到網關收集數據。

　　這是一個重大的挑戰。Sigfox在法國開發了一種低功耗無線協議，網絡實施，和云計算基礎設施，可以用來連接數以百萬計的低功耗無線設備。低功耗協議結合網關類似于蜂窩電話系統網絡，但不同的機器對機器的應用在蜂窩網絡，SIGFOX網絡致力于物聯網應用，如健康、能源監控、溫濕度檢測和安全監測。

　　SIGFOX has optimized its network implementation for the low data rates unidirectional aspects of these applications. The network supports rates of 100 bit/s from the node to the gateway， with data transfers limited to 140 times a day. This is still sufficient for monitoring applications， but allows an energy meter， for example， to operate with a link power budget of just 50 microwatts rather than one watt for a cellular network. Focusing on uploads also allows the design of the gateway to be shifted to have a more sensitive receiver that can handle data from thousands of nodes.