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Protection of the environment is the need of the hour. In order to save the environment from the natural hazards, a work has been carried out to detect the early warning of the fire and controlling its spread in forest and industries to avoid damage to the ecosystem using wireless technology. The alarm system has been introduced as a caution of the fire so that people can vacate and prompt action can be taken to reduce the effect of fire by using water pump and buzzer. Wireless sensors are used for collecting the atmospheric parameters like temperature humidity, smoke and then transmit the data to the control room. The solar circuits are used to feed the supply to the sensors. Radio frequency technology has been used for transmitting the signal between transmitter and receiver section. Arduino programming method has been used in both transmitting and receiving section. Appropriate placing and packaging of the transmitter module will be a challenging task for reliable operation of this module in order to protect our environment from these type of hazards .The developed prototype module tested for the various parameters like temperature, humidity, etc and the results found to be satisfied. The fire detection technology can be used in forests to protect the environment and also in public places to the human life.

Mobile Adhoc Network is an autonomous and decentralized network. Its topology changes dynamically and message overhead is more due to its frequent change of topology in network. For reliable transmission there is need to design a network which overcomes these problems like; overhead, Link breakage, power consumption etc. In this paper an attempt is made to overcome above mentioned issues by devising a new concept by modifying existing standard OLSR protocol using spanning tree in network. This approach has improved Packet Delivery Ratio and Throughput also uses minimum energy while transmitting.