libcoap3-dev - 4.3.1-1 main

Lightweight application-protocol for devices that are constrained their
resources such as computing power, RF range, memory, bandwidth, or network
packet sizes. This protocol, CoAP, is developed in the IETF working group
"CoRE", and was standardized in RFC 7252.
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This package contains the developer files like headers, the static library
and the pkg-config files.