Sub-1Ghz Low-Power Wireless Node For IoT Based Smart Home System

Abstract

Internet of Things (IoT) development is a very challenging topic, and the debate about the actual implementation is still wide open. Various studies have been conducted in term of smart home system based on IoT technology. However, resources that concern on how to practically implement the particular energy-saving and resource efficient technology for smart home need to be improved. In this study, presented the field experiment results related to implementation of low-power node modules using sub 1 GHz LPWAN (low-power wide area network) connectivity. LPWAN technology has unique characteristics, such as a transmit power that in SRD class (short range device) but cellular like coverage range. LPWAN network support star topology by default, so it can overcome the problem of power usage inconsistency, network delay and the complexity of the routing management process found on conventional mesh-based sensor networks. Based on the field experiment result, the furthest distance under outdoor condition could reach up to 350 meters (RSSI −85 dBm) and 150 meters (RSSI −95 dBm) under indoor condition. Based on the power usage test, life-span estimation could reach up to 1 year or 17 years depend on the scenarios and battery types.