micro-ROS / micro-ROS/micro_ros_setup

Error building micro-ROS component on Raspberry Pi 4 with ESP32

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Description

## Issue template

- Hardware description:
- Raspberry Pi 4
- esp32 WROOM

- RTOS: freertos on esp32
- Installation type: tried `micro_ros_setup` but got error (mentioned below). Tried installing ESP-IDF directly and then using [micro-ROS component for ESP-IDF](https://github.com/micro-ROS/micro_ros_espidf_component). (More errors mentioned below)
- Version or commit hash:
- installed ROS 2 `humble` on Rapsberry Pi
- ESP-IDF (v5.0)

## Description

I first tried installing `micro_ros_setup`. The [build process](https://github.com/micro-ROS/micro_ros_setup/blob/humble/README.md#building
) was okay but when [creating micro-ROS firmware](https://github.com/micro-ROS/micro_ros_setup/blob/humble/README.md#creating-micro-ros-firmware) by running the following command,
```
ros2 run micro_ros_setup create_firmware_ws.sh freertos esp32
```
I get the following error
```
Installing ESP-IDF tools
Installing tools: xtensa-esp32-elf, xtensa-esp32s2-elf, esp32ulp-elf, esp32s2ulp-elf, openocd-esp32
ERROR: tool xtensa-esp32-elf does not have versions compatible with platform linux-arm64
[ros2run]: Process exited with failure 1
```
It seems like `micro_ros_setup` is not compatible with raspberry pi 4.

So instead, I installed the ESP-IDF following this [link](https://docs.espressif.com/projects/esp-idf/en/release-v5.0/esp32/get-started/linux-macos-setup.html). I was able to flash the `hello_world` example. The version I installed was v5.0 since it states that `micro-ROS component has been tested in ESP-IDF v4.3, v4.4, and v5.0 with ESP32` shown [here](https://github.com/micro-ROS/micro_ros_espidf_component).
```
ubuntu@ubuntu:~$ idf.py --version
ESP-IDF v5.0.1-397-g3050ea656f
```
I wanted to ask
1. Can `micro_ros_setup` work for raspberry pi 4? Or is it not compatible for linux-arm64?
2. I think the `Example` section can be elaborated. In the example shown [here](https://github.com/micro-ROS/micro_ros_espidf_component/#example), why isn't `components` directory created under the `int32_publisher` directory? Under the `Usage` [section](https://github.com/micro-ROS/micro_ros_espidf_component/#usage), it states to clone the repo directly in the components folder. Please correct me if I'm wrong.

I copied the `int32_publisher` example from the `micro_ros_espidf_component`([link](https://github.com/micro-ROS/micro_ros_espidf_component)) into the home directory, created a components directory instead `int32_publisher` directory and then git cloned `micro_ros_espidf_component` inside it.
```
ubuntu@ubuntu:~/int32_publisher/components$ ls
micro_ros_espidf_component
```
Running `idf.py build` command inside the `int32_publisher` directory, generates the error below
```
MakeFiles/__idf_main.dir/main.c.obj.d -o esp-idf/main/CMakeFiles/__idf_main.dir/main.c.obj -c ../main/main.c
../main/main.c:10:10: fatal error: uros_network_interfaces.h: No such file or directory
10 | #include
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
[844/851] Building C object esp-idf/wifi_provisioning/CMakeFiles/__idf_wifi_provisioning.dir/src/scheme_softap.c.objninja: build stopped: subcommand failed.
HINT: Please make sure that the header name is correct. Also please check if you've specified all component dependencies with 'idf_component_register(REQUIRES ...)'. If the component is not present then it should be added by the IDF Component Manager. For more information run 'idf.py docs -sp api-guides/build-system.html'.
Also, please check if the header file has been removed, renamed or relocated - refer to the migration guide for more information.
ninja failed with exit code 1, output of the command is in the /home/ubuntu/int32_publisher/build/log/idf_py_stderr_output_651110 and /home/ubuntu/int32_publisher/build/log/idf_py_stdout_output_651110
```
I googled this error but didn't get anything helpful.

Contributor guide

Open the contributing guide

Research direction

Start with the micro_ros_setup README's firmware-creation steps and the create_firmware_ws.sh command on linux-arm64. Then inspect the micro_ros_espidf_component example, its components layout, main/main.c, and the reported build logs for the missing uros_network_interfaces.h. Done means the Raspberry Pi compatibility and example layout are verified and the documentation or build issue is addressed.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux, raspberry-pi, shell
Domain
build-system, embedded-iot
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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