INTEGRATION¶

Introduction¶

Note

In this section, we introduce how to integrate the mqtt driver into the project.

Create a New Component¶

Warning

Before you create a component in the driver directory, make sure you have incorporated the driver directory into the project by adding the path to the driver directory to the EXTRA_COMPONENT_DIRS variable in the project-level CMakeLists.txt file.

Open the project in VSCode, open the integrated terminal, and type in

get_idf

to actiate the ESP-IDF environment. Then type in the following command to create a new component named esp32_mqtt:

idf.py -C driver create-component esp32_mqtt

Danger

Note that there is a built-in MQTT module in esp-idf, so to avoid conflicts, we name this module esp32_mqtt.

The command above means to create a new component named esp32_mqtt in the driver directory. After executing the command, you will see a new directory named esp32_mqtt in the driver directory. And the command will automatically generate the CMakeLists.txt file for the new component, as well as the mqtt.h and mqtt.c files.

Alternatively, you can mannually create the esp32_mqtt directory in the driver directory, and then create the CMakeLists.txt, mqtt.h, and mqtt.c files in the esp32_mqtt directory.

Replace the Code¶

Component Level

Replace the code in this section into the CMakelists.txt, mqtt.h, and mqtt.c files under the component.

Project Level

Replace the code in main.c with the corresponding code. No need to change the CMakeLists.txt file at the project level.

Compile and Flash the Project¶

Open the project in VSCode, open the integrated terminal, and type in

idf.py build flash monitor

Now, you will be able to see the corresponding output in the terminal.