WirelessHART

WirelessHART est une technologie adaptée aux réseaux de capteurs basée sur le Highway Addressable Remote Transducer Protocol (HART)

Caractéristiques:

Fiable même avec un fort bruit, grâce à sa topologie topologie "mesh", aux changement de chaîne, e.t aux messages synchronisés
Sécurité et confidentialité des communications grâce aux chiffrement, authentification etc.
Faible consommation adaptée aux appareils sur batteries, panneaux solaires etc.

Le protocole HART est basé sur 5 caractéristiques clés :

Ce protocole n'est qu'un protocole parmi les nombreux utilisés dans les réseaux de capteurs.

Protocole	Standard & Fréquence standard	Exemples	Avantages	Désavantages
Zigbee	IEEE 802.15.4ISM band 2.4GHz and 900MHz	NXP Panasonic	Low-cost, power efficient, easy solution for small networks. Use is widespread.	Cannot serve a high number of nodes within the specified period.
WirelessHART - Highway Addressable Remote Transducer Protocol	IEEE 802.15.4ISM band 2.4GHz.	Panasonic	Designated as an International standard. Built on a 30-year old HART technology. An accepted standard. Created specifically for industrial controls.	Not compatible with some existing wired protocols (FieldBus®, Profibus®, etc.)Up to 250 nodes on a network.
ISA-100.11a	IEEE 802.15.4ISM band 2.4GHz.	RFM Microchip Panasonic	Can scale above 250 nodes per network. An accepted standard. Created specifically for industrial controls. 600m range.	Not yet in wide use. Communicates with HART®, Fieldbus®, Modbus®, Profibus®.
Wi-Fi – Low power	IEEE 802.11a/b/g/n/ac2.4 GHz and 5GHz. (inconsistent worldwide)	Murata Microchip	Higher data rate.Mature technology; no bridges required to interface to the web.	Higher power consumption.
Bluetooth Low Energy	IEEE 802.15.1ISM band 2.4GHz.	Murata Panasonic	Compatible with large number of consumer devices. Low cost with high data rate(1 Mbit/s).	Consumes more power than 802.15.4 protocols, but less than 802.11

Ressources :