摘要 : In the literature, harvested Radio Frequency (RF) power lies in the micro-watt (mu W) range and power consumption of IoT (Internet of things) sensor nodes lies in the range of milli-watt (mW). Hence, environmentally hazardous lith... 展开 In the literature, harvested Radio Frequency (RF) power lies in the micro-watt (mu W) range and power consumption of IoT (Internet of things) sensor nodes lies in the range of milli-watt (mW). Hence, environmentally hazardous lithium-ion batteries or power supplies have also been used to power sensor nodes along with the energy harvesting circuit. In this paper, a novel technique is used to make a self-sustained sensor by reducing power consumption. An IoT-enabled device NodeMCU, along with the DHT11 sensor, has been used for testing. An IoT-enabled development board requires 225 mW of power to function. The power consumption has been reduced from 225 mW to 264 mu W through circuit modifications and deep sleep code. The calculated average power consumption in the modified circuit is 359.2 mu W which can be achieved from environmental RF radiation to make battery-free, self-sustained sensors. 收起