Wi-Fi/IEEE802.11 for sensor network
GetSenso low cost WiFi smart sensor uses industrial stander 802.11 module designed especially for Wireless Sensor Networks, offering an ideal solution satisfying all the requirements of sensor nodes. It has an ultra-low power micro-controller which interfaces with various sensors and GetSenso’s WLAN subsystem.
Importance Of Sensor Networks
Applications And Opportunities
Wireless sensor networks help to enable smart environments that reduce energy usage, improve security and safety. Some applications are
Commercial: Building automation with safety and security, Air quality management.
Industrial: Predictive equipment maintenance like corrosion detection, temperature etc.,
Residential: Home security, Entertainment system, Security and safety systems.
Metro: Traffic management, Air quality monitoring, power management in street lights.
ZigBee Wireless senor network
Wireless sensor network (WSN) can be created using variety of RF modules and protocols. Some protocols are proprietary to the manufactures or vendors, and others are industry standards. One such common protocol used is ZigBee protocol industry standard for data transmission built on IEEE 802.15.4 a detailed discussion on how the protocol is used and explore the features that they were designed to use.
Although ZigBee standard development is still under progress, the ZigBee market is opened for various applications. The most promising of them are:
Home Control : Security, Heating, Ventilation, and Air-Conditioning (HVAC), Lighting control, Access control, Irrigation
Personal health care : Patient monitoring, Fitness monitoring
Industrial control : Asset management, Process control, Energy management, Environmental
Building automation : Automatic Meter Reading (AMR), Security, HVAC, Lighting control, Access control • Consumer electronics: Remote control.
PC & peripherals : Mouse, keyboard, joystick,
Environment : Environment monitoring.
6LoWPAN for sensor network
6LoWPAN is an open standard defined in RFC 6282 by the Internet Engineering Task Force (IETF), the standards body that defines many of the open standards used on the Internet such as UDP, TCP and HTTP to name a few. A powerful feature of 6LoWPAN is that while originally conceived to support IEEE 802.15.4 low-power wireless networks in the 2.4-GHz band, it is now being adapted and used over a variety of other networking media,This white paper discusses key 6LoWPAN concepts to demonstrate how it enables the use of IPv6 over IEEE 802.15.4 radio links.
Open IP Standard
- Open standards including TCP, UDP, HTTP, COAP, MQTT, and websockets
- End-to-end IP addressable nodes
- No gateway needed. A router connects the 6LoWPAN network to IP.
- One-to-many and many-to-one routing
- Robust and scalable
- Mesh routers can route data destined to others, while hosts are able to sleep for long periods of time
Multiple PHY support
- Freedom of frequency band & physical layer
- Use across multiple communications platforms (i.e. Ethernet / Wi-Fi / 802.15.4 / Sub-1GHz ISM)
- Interoperability at the IP level
WSN for wide area network and asset trackers
Wireless temperature data logger provides the capability to remotely monitor an environment in which it is placed. Temperature sensors are located at multiple nodes and each node contains one sensor and a ZigBee transmitter temperature sensor data is transmitted periodically to the coordinator through intermediate ZigBee routers. Thus creating a mesh network
When the network area is large in terms of few kilometers and the number of sensors is large enough to create a cluster, the system must be able connect these individual cluster and upload the data through multiple internet Access points (AP). Each cluster will have a coordinator that is connected to an internet enabled GPRS gateway. A gateway converts the ZigBee data into GPRS data and uploads the data through the internet to the cloud.
Note: this network is useful if sensors are spanned into large areas in the form of clusters