Power Consumption Analysis and Optimal Operation Method of Wireless Multi-sensor Module

Smart farms and smart factories utilize various environmental measurement and task recognition sensors. For situations requiring simultaneous measurements, a multi-sensor module that combines several sensors into one unit is advantageous. This study focuses on integrating various sensors into a single module and proposing an optimal usage method to minimize the power consumption of a wireless multi-sensor module capable of remote measurements. Analysis of the power consumption of individual sensor components revealed that when the measurement interval exceeds one minute, power consumption can be reduced by over 50.3% by turning off sensors during idle periods. If real-time responsiveness is not essential, the most efficient approach is to keep the entire module in sleep mode during these idle periods. A practical experiment was conducted using a multi-sensor module equipped with temperature and humidity, illuminance, CO2 concentration, and soil moisture sensors. When continuously powered, the module operated for 40 hours on a 3500 mAh Li-ion battery. However, by implementing sleep mode with a five-minute measurement interval, the operational duration extended to 562 hours.