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Open-Source Tools for IoT Security
Published in Syed Rameem Zahra, Mohammad Ahsan Chishti, Security and Privacy in the Internet of Things, 2020
Anam Iqbal, Mohammad Ahsan Chishti
FreeRTOS is a freely distributed operating system under the MIT open-source license. It supports more than 40+ processor families like Cyclone V SoC, ARM Cortex-M33 simulator, and SAMV7. It is developed in C language. It includes a kernel and a huge set of libraries suitable for sorts of applications. FreeRTOS has a microkernel architecture. Tasks are executed in a multithreading environment. Since it is a real-time system, the memory allocation is dynamic, and scheduling is done in real-time on a cooperative and preemptive basis. As a power management technique, the system is sent into deep sleep mode when waiting for hardware or other resources. The FAT file system is provided for file management (Jaskani et al., 2019; Bansal and Kumar, 2020; Anon., 2020c).
Common Electrical Myths That Increase Energy Costs
Published in John Eggink, Managing Energy Costs: A Behavioral and Non-Technical Approach, 2020
Power management is a process that allows computers and monitors to enter low-power states when sitting idle for a predetermined amount of time. Simply hitting the keyboard or moving the mouse will wake the computer or monitor from its low-power “sleep mode.” It is a good idea to utilize the power management features on your computer to power down computers left inactive for 15 minutes.
Energy-Efficient Smart Wearable IoT Device for the Application of Collapse Motion Detection and Alert
Published in IETE Journal of Research, 2023
Laxmikant Dewangan, Arpita Rani Vaishnava
Algorithm & logic designing: Here we are using Ardunio IDE for logic building of our MCU. We are using ATTINY85 as a MCU which will take all decisions about the fall down position and when the fall down position is detected, then a hardware interrupt signal will be generated by the MCU, as a result ESP8266 Wi-Fi module will wake up. Internet connectivity is provided to ESP8266-01 module to send data at the think speak cloud server. Here for continuous monitoring of the device we use the think speak server. The moment after the fall position detection and data sending completion, the think speak cloud server and ESP8266-01 will make connection with bulk SMS service. For bulk SMS service we use Text Local Services. The moment when SMS server will be triggered by the device, a help message will be sent by the device to registered numbers [32]. Here we are primarily concerned about power management so that an efficient utilization of power in smart way can be achieved to enhance the battery life. To save power here we use the concept of sleep and wake-up mode until there is no fall detection ESP8266-01will be always in the deep sleep mode. MCU will trigger once in every 4 s. Here we use the sleep mode system to achieve ultra- low power system, as our system requires 0.2475 mW when it is active on the sleep mode it requires only 50uA; in this way we can achieve our ultra-low power management system (Figure 1).
Energy savings and usability of zero-client computing in office settings
Published in Intelligent Buildings International, 2020
Amanda Farthing, M. Rois Langner, Kim Trenbath
Differences in occupied hour averages are not as large as the load profiles in Figure 4 seem to suggest, possibly due to laptops’ superior power management strategies. Although laptop workstations frequently reached higher peak loads, their built-in power management allowed the laptops and monitors to enter a low-energy sleep mode if workstations were idle for more than 15 minutes. While the Wyse zero-client device also sent monitors to sleep and entered an ‘idle’ state after 15 minutes, the power use of the idle zero-client workstation remained relatively high (∼12–15 W). It is likely that zero client power during occupied hours could have been significantly reduced if users had completely powered off their zero client when leaving their workstations for more than 15 minutes. Unlike laptops, the user’s VM (and all open documents and applications) would be unaffected by powering down the zero client.
Wireless sensing modules for rural monitoring and precision agriculture applications
Published in Journal of Information and Telecommunication, 2018
Phat Tan Lam, Tan Quang Le, Ngan Nguyen Le, Son Dat Nguyen
After running tests on designed sensing modules, the program achieved the requirements such as data collection (air temperature/humidity, soil moisture, light intensity and pH ) as well as exchange of data between nodes with the energy-saving protocol. With the proposed MAC-layer protocol by the authors, the sensing nodes automatically switch into ‘sleep mode’ in case of no data-exchange. As a result, this leads to significant energy saving, thereby increasing the lifetime of the sensing modules (with fixed battery) in real-world applications. However, the protocol and functionality still have some limitations and need to be improved for commercial products as explained in the next paragraphs.