Add UART part to existing AWS Project

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1

Hi,

I’ve done the Getting Started with https://docs.aws.amazon.com/freertos/latest/userguide/getting_started_espressif.html and have a MQTT connection up and running with the AWS cloud.

Now I just want to add the functionality/defines from Espressif ESP-IDF UART part into the AWS demo MQTT project.
I just don’t know how to do it?

I’m running Windows 10.

2

Hello @abcde

Thanks for contacting us. Great to hear that you could get MQTT connection working. Can you please elaborate on which ‘Espressif ESP-IDF UART part’ are you trying add to the demo project ?
It will be helpful to know exactly what are are you trying build so that we can help. Note: ESP project uses cmake and if you want add files , you will have change cmake files.
Thanks!

3

Hi,

The needed functions and defines are in the uart.c and all depending support files (such as the include files in uart.c and deeper).

How do I “lift” them into my AWS demo project?

These steps are to be done?

  1. Copy all needed files to some sub folder(s) in my AWS demo project.
  2. Change/create needed CMakeLists.txt files.
  3. Run cmake or cmake-gui to Configure and Generate needed build files.
  4. Run ninja to compile.
  5. Flash and execute.

For me the tricky parts are the two first points above.

4

Does anyone know how to add esp-idf components?

5

Hello abcde,

You can add new components from idf.py by modifying the CMakeLists.txt at this location. https://github.com/aws/amazon-freertos/blob/a6a459b5e498f92db5ab16d6bf69f8d449d8c8e9/vendors/espressif/boards/esp32/CMakeLists.txt#L93.

The UART code is already within the repository, so you do not have to copy any new files. You will likely have to enable the ringbuf component as it is a dependency of the Espressif UART driver.