The TinyOS operating system for wireless sensor networks with a hybrid scheduler

WSN is the basis for various applications of varying requirements including evergreen technologies like IoT. The architecture of WSN faces many challenges like numerous tiny-sized nodes with low power, wireless communication in particular radio range, being exposed to drastically changing surrounding nature, dynamically changing network size, etc. Thus, WSN needs the support of hardware, software, and operating systems installed in it. At present, there are many operating systems available such as TinyOS, Free-RTOS, RIOT, Contiki, etc. The same set of OS is used by IoT also. Among these TinyOS is the widely used, highly documented, popular, and most suitable OS for low-power devices. The only drawback of TinyOS is the availability of a single scheduler that works in FCFS (First Come First Serve) order which can’t support real-time applications. This research proposes a new hybrid scheduler that provides both FCFS and priority schedulers. Schedulers’ performance analysis is done by taking the scheduling criteria AWT (Average Waiting Time), and ATT (Average Turnaround Time).