Install libmosquittopp-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libmosquittopp-dev
Description:
MQTT version 3.1 client C++ library, development files
This is the header and man page for the libmosquittopp1 C++ library, which is a library for implementing MQTT version 3.1 clients. This package is needed to do development with libmosquittopp1.
Homepage: http://mosquitto.org/
Version: 1.4.15-2
Section: universe/libdevel