a subordinate to that layer :all belong to Net Layer , the two are parallel relationships. .two contiki- NETWORK layer of rime with the IPv6 (6loWPAN) the location relationship:Relationship 1:uipv6 with the rime design independently of each other :Referencing from the networkRelationship 2:uipv6 over RimeReferencing from the networkRouting Support Scenarios ?
rime
can support routing itself. rime is a standalone, lightweight, A p
introduce you:
(1) Ubiqua Protocol Analyzer this tool can Decode zigbee-related communication protocols. Of course wireshark can also. (2) IAR Embedded Workbench this tool is developed for zigbee Iot devices. Embedded device development tool, zigbee principle: in fact, it is 51 single-chip microcomputer or the collection device on the arm Chip Control Board receives the returned data, and then sends and receives the data through the zigbee protocol Wireless RF communication module.
The coordina
links that perform routing operations across IP links.The multilayer routing architecture is described in Figure 5.5. At the IP layer, the node performs the IP routing function, and the link layer node is not visible. At the link layer, the node uses the MAC address for "non-link" "Routing", which computes the path at the link layer. In this case, only N1, N2, and N4 are at the link layer.First, such a multilayer approach is thought to be designed and deployed. The
number of equipment, including Nest thermostat, Samsung intelligent Air-conditioning systems, Insteon LED bulbs, Roku, Google Chromecast, Pebble smart watches, Goji intelligent locks and many other devices. It is written with node.js and can be mounted on Raspberry Pi.
Related websites: http://thethingsystem.com/index.html
Middleware Article
Iotsys
This object networking middleware provides a communication stack for smart devices. It supports a variety of standards and protocols, including IPV6
and improvement of the existing protocols. Almost all research efforts focus on energy conservation.
The current and future research of ZigBee will focus on routing algorithms such as further reducing network energy consumption and extending network life.
② 6lowpan Protocol
Iot has two meanings:
The Internet is the core and foundation of the Internet of Things. The Internet of Things must be extended and expanded on the basis of the Internet;
End
Tags: IOT mbed This video demonstrates 6 lowpan applications between Iot devices based on ARM mbed, such as applications connecting home soil humidity sensors, lighting control, and security linkage. 650) This. width = 650; "class =" Full aligncenter "Title =" [Video] arm tells you how to use Iot, mbed 6 lowpan demo-1 "src =" http://www.mr-wu.cn/wp-content/uploads/2014/10/1412836633_thumb.jpeg "alt =" [Video] arm tells you how to play with IOT, mbed 6 lowpan demo-1 "align =" Middle "style =" b
This video demonstrates 6 lowpan applications between Iot devices based on ARM mbed, such as applications connecting home soil humidity sensors, lighting control, and security linkage.Demo VideoOriginal article, reprinted Please note:Reposted from http://www.mr-wu.cn/Wu chuanbin's blogLink:[Video] arm tells you how to play with IOT, mbed 6 lowpan demo http://www.mr-wu.cn/arm-mbed-iot-6lowpan-demo/[Video] arm tells you how to use IOT, mbed 6 lowpan dem
, such as the connection of a number of wearable devices, the information between each other can be immediately sent to the receiving device.
In addition, Bluetooth 4.1 adds more flexibility for developers, and this change has little impact on ordinary users, but it is important for software developers because Bluetooth must be able to support multiple devices simultaneously in order to cope with the emerging wearable devices.
Currently there are fewer handsets to support the stand
the IEEE 802.15.4 link layer. If the IPV6 header compression protocol 6LoWPAN is used, the package may be too small, so the measures taken are: if the package size is smaller than the given size threshold, no compression is done. In Contiki 2.5, the configuration used by Contikimac:
TI = 0.4 ms
TC = 0.5 ms
TS = 0.884 ms
2.2 Packet detection and fast sleepCONTIKIMAC CCA Packet detection is unreliable: It detects only if the si
Bluetooth was initially standardized to 802.15.1, and later Bluetooth came out with several versions, not standardized to 802 series
ZigBee with 6lowpan is a technology developed in the 802.15.4 Layer
ZigBee transmission is also 100 meters, it is difficult to do 1-kilometer
Sigfox This network should be used by the 802.15.4 of the MAC layer technology + plus others mature physical layer technology, but SIGFOX has its own signal amplification technol
item for information exchange and communication.
Therefore, the Internet of Things can be defined as being connected to the wireless network through RFID, sensors, and QR codes of devices on various objects through interfaces, so as to give objects "intelligence ", communication and dialogue between people and objects can be realized, or communication and dialogue between objects. The network that connects objects is called "Iot ".
Currently, the widely used IPv6 can be considered to support an
encapsulation style in the Internet, in the IoT application system, in the IoT application system, the data service can be opened by open Rest API and called by other applications in the Internet.6, CoAP (Constrained application Protocol) Agreement IntroductionCOAP protocol Abbreviation: Limited application protocol, applied in Wireless sensor network protocol. Coap is a simplified HTTP protocol for RESTful API,COAP is the application layer protocol in the
and life in a more granular and dynamic way, thus improving the information ability of the whole society.The Internet of things is divided into three parts from a technical point of view: comprehensive perception, reliable transmission, intelligent processing, is an extension of traditional embedded technology, including from ARM interface Technology, sensor interface technology, microcontroller driver applications, wireless network technology,ZigBee Wireless communication technology,
addition, Bluetooth 4.1 adds more flexibility to the developer, which has no significant impact on the average user, but is important for software developers because Bluetooth must be able to support multiple devices at the same time in order to cope with the emerging wearable devices.There are fewer handsets to support the standard, and Samsung Galaxy Note4 is one of the most iconic.Bluetooth 4.2 StandardDecember 4, 2014, the latest Bluetooth 4.2 standard promulgated, improved data transmissio
, and support for the Ipv6/6lowpan network, making the new version "the Best Bluetooth technology ever". Errett Kroeter, senior director of the brand and developer market at the Bluetooth Technology Alliance, said at a media presentation that Bluetooth 4.2 was launched to make Bluetooth smart the best solution for connecting everything from personal sensors to smart homes.--zigbee is "Better than you, and more than you try" typical. In smart home appl
https://www.quora.com/ What-are-the-main-differences-between-bluetooth-4-0-4-1-and-4-2-in-the-layers-baseband-lmp-l2cap-app-layer
Http://sina.com.hk/news/article/20131223/0/5/0/-38766.html?cf=o.digital
The difference between BLE4.1 compared to BLE4.0 is:
1 with 4G network integration, reduce interference
2 can simultaneously master and from, provide speed
3) IPv6
4 simplifies the connection process of the device
V4.0 to V4.1 hardware does not need to change.
The difference between BLE4.1 and
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