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C:\ESP\sprinkle
└─sprinkle-sensor
  ├─CMakeLists.txt
  ├─sdkconfig
  ├─build
  ├─components
  │ └─sprinkle_common
  │   ├─CMakeLists.txt
  │   ├─component.mk
  │   ├─sprinkle_common.c
  │   └─include
  │     └─sprinkle_common.h
  └─main
    ├─CMakeLists.txt
    └─sprinkle-sensor.c

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# For more information about build system see
# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
# The following five lines of boilerplate have to be in your project's
# CMakeLists in this exact order for cmake to work correctly
cmake_minimum_required(VERSION 3.16)

include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(sprinkle-sensor)

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#include <stdio.h>
#include "sprinkle_common.h"
    
void app_main(void) {
    printf("MESSAGE_MOISTURE_SENSOR=%d\n", MESSAGE_MOISTURE_SENSOR);
}

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C:\ESP\sprinkle
├─components
│ └─sprinkle_common
│   ├─CMakeLists.txt
│   ├─component.mk
│   ├─sprinkle_common.c
│   └─include
│     └─sprinkle_common.h
└─sprinkle-sensor
  ├─CMakeLists.txt
  ├─sdkconfig
  ├─build
  └─main
    ├─CMakeLists.txt
    └─sprinkle-sensor.c

Code: Select all

# For more information about build system see
# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
# The following five lines of boilerplate have to be in your project's
# CMakeLists in this exact order for cmake to work correctly
cmake_minimum_required(VERSION 3.16)

set(EXTRA_COMPONENTS_DIR ..)
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(sprinkle-sensor)

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C:/ESP/sprinkle/sprinkle-sensor/main/sprinkle-sensor.c:15:10: fatal error: sprinkle_common.h: No such file or directory
   15 | #include "sprinkle_common.h"
      |          ^~~~~~~~~~~~~~~~~~~
compilation terminated.