Provides classes and functions to make CoAP programming simple and portable.
Constrained Application Protocol ( CoAP ) is a machine-to-machine (M2M) web transfer protocol for use with constrained nodes and constrained networks in the Internet of Things (IoT). It is designed to easily interface with HTTP for integration with the Web, while meeting specialized requirements such as multicast support, very low overhead, and simplicity for constrained environments.
The Qt CoAP module implements the client side of CoAP defined by RFC 7252 . Generally, CoAP is designed to use datagram-oriented transport such as UDP, so the current implementation of the transport is based on UDP. However implementing custom transports based on TCP, WebSocket, and so on, is also possible.
The Qt CoAP module supports:
Using the Module#
Using a Qt module requires linking against the module library, either directly or through other dependencies. Several build tools have dedicated support for this, including CMake and qmake .
Building with CMake#
find_package() command to locate the needed module components in the
find_package(Qt6 REQUIRED COMPONENTS Coap) target_link_libraries(mytarget PRIVATE Qt6::Coap)
See also the Build with CMake overview.
Building with qmake#
To configure the module for building with qmake, add the module as a value of the
QT variable in the project’s .pro file:
QT += coap
Articles and Guides#
Licenses and Attributions#
Qt CoAP is available under commercial licenses from The Qt Company. In addition, it is available under the GNU General Public License, version 3.