TinyOS is an open source operating system designed for wireless sensor networks. It was developed as a collaboration between the University of California and Intel Research. TinyOS uses a component-based and event-driven architecture to allow for efficient multi-tasking, networking, memory management, power management, and process scheduling on small, low-power wireless devices called motes that are used to monitor environmental changes. Tasks in TinyOS run non-preemptively in FIFO order and code is statically linked to optimize for the highly constrained resources of motes.

1. A STUDY OF
OPERATING SYSTEMS FOR
WIRELESS SENSOR NETWORKS

2. WIRELESS SENSOR NETWORKS:
A wireless sensor network (WSN) is a wireless network
consisting of distributed autonomous devices (say motes) which contains
sensors to monitor environmental changes and these changes are
communicated to a remote computer at regular intervals.
MOTES:
Mote is a tiny hardware device which consists of Sensors,
Microcontroller , Analog to Digital Converter and power supply.
CHARACTERISTICS OF MOTES:
• Smaller in size
• Highly memory constrained devices(<20 KB RAM)
• Low power consumption(<30 mA)
• Limited processing capacity

3. OPERATING SYSTEM FOR MOTES:
Motes are simple hardware devices and they need to
communicate with each other. For this we need an Operating System to
establish communication with other motes.
Operating Systems are used in Motes to achieve the following
features
• Efficient multi-tasking
• Networking
• Memory management
• Power management
• Process scheduling
Available operating system for motes is as follows:

4. TINY OS:
Tiny OS is a free open and open source operating system for
Wireless Sensor Networks. It started as a collaboration between the
University of California and Intel Research. Tiny OS is completely
written using nesC programming language.
FEATURES OF TINY OS :
• Component-Based operating system.
• Event driven Operating System.
• Tasks are non-preemptive and run in First In First Out(FIFO) order.
• Codes
are
linked
statically.
• Application and Libraries are written using nesC,a programming
language .