This is MQTT v5 client implementation, with limited support of TLS v1.3 protocol, third-party cryptography library. It's verified on different embedded system platforms (currently STM32F4 and Raspberry PI development board).
Update configuration file mqttclient.conf with correct parameters e.g. address, port, user ID, password of MQTT broker, certificate path, private key path ... etc. , then run the following command :
make config
Download all necessary third-party repositories before building MQTT client library:
make download_3party
To build MQTT client library, you have :
make DEBUG=yes -C third_party
make DEBUG=yes
where DEBUG=yes is optional for debugging purpose. build/libmqttclient.a should be ready once the library is successfully built.
To Build the demo test images, you have :
make demo DEBUG=yes EXTRA_C_DEFS="MQTT_CFG_RUN_TEST_THREAD "
where MQTT_CFG_RUN_TEST_THREAD is optional macro if you'd like to run the test in seperate thread.
To build / run unit tests, you have :
make utest
optional openOCD debug console (user specific) :
make dbg_server OPENOCD_HOME=/path/to/your/openocd_folder
optional GDB debug command (user specific) :
make dbg_client