CoAP

Constrained Application Protocol (CoAP) est un protocole applicatif d'invocation de requête-réponse pour des réseaux de capteurs sans fil IPv6/LoWPAN

Motivation : HTTP/REST-like protocol for constrained sensors
 * 128KB FlashRAM and 4KB RAM
 * Battery consumption (sleep and periodical wakeup)
 * Interaction
 * Request-response
 * Subscribe-Notify
 * REST (READ, WRITE, CREATE, DESTROY)
 * Resource discovery
 * /profile URI multicast + DISCOVER method
 * Protocol binding
 * UDP and UDP Multicast (16-bit sequence number for reliability)
 * Optionally TCP without "stop and wait"
 * Caching
 * Important since sleeping mode
 * CoAP proxy (for subscription ...)

Implementations
 * Python http://sourceforge.net/projects/coapy/
 * C
 * Java