Install libcoap-1-0 by entering the following commands in the terminal:
sudo apt update sudo apt install libcoap-1-0
Description:
C-Implementation of CoAP
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",
Homepage: https://libcoap.net/
Version: 4.1.2-1
Section: universe/libs