What is Constrained Application Protocol (CoAP)? Constrained Application Protocol · CoAP

What is CoAP?#

CoAP brings RESTful semantics (GET, POST, PUT, DELETE) to low-power embedded microcontrollers by operating over UDP with lightweight headers and optional multicast.

Everyday Analogy#

Sending concise, structured text messages over radio frequencies rather than initiating full phone call negotiations.

Practical Applications#

• Smart utility grid electricity meters reporting readings to central stations
• Building automation sensors monitoring room temperature via REST endpoints