Smart House Project Based On Wireless Transmission

With the development of science and technology, the relationship between people’s life and working with communication has become closer. Information society has challenged traditional living environment as well as it changed the way people live and working habbits. People have high expectation on household environment as well as equipment of smart home.Consider of this, people hope that they will have an efficient, comfortable, safe and convenient living environment which based on home consisting of system, structure, sevice and management.So the concept of smart house appeard on the scene.After the summary of research status of smart house,we got a conclusion that wireless sense network has become one of the research hotspots. The target of the system we will reach is low power, low cost and comfortable user experience.In the part of node data sampling, we use nRF24L01, which is a low power, small size and easy peripheral circuit chip which work on 2.4~2.5GHz. This chip integrate the wireless receive and transmission core. Meanwhile, as it doesn’t have a response network protocol, people don’t use it in the application which needs ad hoc network. Our system finally designed a tree mode routing through comparing and analyzing the network topology structure and routing algorithm. After referring to aloha algorithm,we resolve the conflicting between node by using auto retransmission and 16-level retransmission delay.According to the requirement of the application circumstance, a suitable gate is needed. The requirement of gate designment is convenient on considering of that the gate is the final hardware part to interactive with user.The article breaks down as follows to explain how the gate works: design of Wi-Fi module, achieve the B/S structure, the maintenance of routing table and the interface of coordinate. The terminal is a software designing for user experience which also needs to consider about convenience and practicability. The article achieve a C/S interface as the supplement of B/S interface and choose Sqlite as data base.At last, the article state two part possible to improve, one is the Bluetooth4.1 which make it possible to make the node have a lower power, and the other is PLC(Power Line Communication) which make our project have a larger coverage in office.