Bonjour tout le monde.
Ben vas y explique moi pourquoi le zigbee est mieux dans ton cas qu’un autre protocole ?
Et en plus je ne suis sans doute pas le seul, il y a probablement des milliers d’acheteurs de matériel IKEA ou LIDL qui utilisent un réseau non maillé et sans routeur… Tout autant que d’autres utilisant des routeurs probablement sans le savoir.
Oui, et c’est les mêmes qui vont te dire que le zigbee n’a pas de portée, n’est pas stable ou ect …
Je n’ai pas dit que ça ne devait pas marcher, mais que ça marchait mal.
star, tree, and mesh
Oui ça peut marcher dans ces 3 modes, mais vous lisez les pour et les contres des 3 situations, vous allez voir une différence de fonctionnement (désolé du pavé mais je peux pas mettre de liens
- Star topology: The star topology consists of a coordinator and several end devices (nodes), as shown in [Figure 2.2](javascript:popUp(‹ /content/images/chap2_9780137134854/elementLinks/02fig02.jpg ›)). In this topology, the end device communicates only with the coordinator. Any packet exchange between end devices must go through the coordinator. The disadvantage of this topology is the operation of the network depends on the coordinator of the network, and because all packets between devices must go through coordinator, the coordinator may become bottlenecked. Also, there is no alternative path from the source to the destination. The advantage of star topology is that it is simple and packets go through at most two hops to reach their destination.
- Tree topology: In this topology, the network consists of a central node (root tree), which is a coordinator, several routers, and end devices, as shown in [Figure 2.3](javascript:popUp(‹ /content/images/chap2_9780137134854/elementLinks/02fig03.jpg ›)). The function of the router is to extend the network coverage. The end nodes that are connected to the coordinator or the routers are called children. Only routers and the coordinator can have children. Each end device is only able to communicate with its parent (router or coordinator). The coordinator and routers can have children and, therefore, are the only devices that can be parents. An end device cannot have children and, therefore, may not be a parent. A special case of tree topology is called a cluster tree topology.
The disadvantages of tree topology are
- If one of the parents becomes disabled, the children of the disable parent cannot communicate with other devices in the network.
- Even if two nodes are geographically close to each other, they cannot communicate directly.
-
Cluster tree topology: A cluster tree topology is a special case of tree topology in which a parent with its children is called a cluster, as shown in [Figure 2.4](javascript:popUp(‹ /content/images/chap2_9780137134854/elementLinks/02fig04.jpg ›)). Each cluster is identified by a cluster ID. ZigBee does not support cluster tree topology, but IEEE 802.15.4 does support it.
-
Mesh topology: Mesh topology, also referred to as a peer-to-peer network, consists of one coordinator, several routers, and end devices, as shown in [Figure 2.5](javascript:popUp(‹ /content/images/chap2_9780137134854/elementLinks/02fig05.jpg ›)). The following are the characteristics of a mesh topology:A mesh topology is a multihop network; packets pass through multiple hops to reach their destination.The range of a network can be increased by adding more devices to the network.It can eliminate dead zones.A mesh topology is self-healing, meaning during transmission, if a path fails, the node will find an alternate path to the destination.Devices can be close to each other so that they use less power.Adding or removing a device is easy.Any source device can communicate with any destination device in the network.Compared with star topology, mesh topology requires greater overhead.Mesh routing uses a more complex routing protocol than a star topology.
On peut utiliser un hélicoptère pour aller au boulot, mais si on préfère la voiture c’est pas pour rien, « pouvoir faire » et « être fait pour » n’est pas la même chose.
Ce n’est pas le probleme que tu n’aie que des capteurs, tu fais comme tu veux, mais que tu n’aie pas de réseau zigbee du tout, tu n’utilises pas le maillage, pas le retour d’état, pas la gestions des groupes, ect …
Pour ce que tu en fais, il y a beaucoup mieux, avec plus de portée par exemple, moins de limite par « coordinateur » si on peut appeler ça comme ça chez toi, ect …
Comment après avoir vu ça.
On peut croire que ça, c’est du zigbee ?
Oui ça marche, mais sans les fonctionnalités du zigbee et toute les restrictions possibles.