MQTT example not finding lte_lc.h

[Axlotl]

Hello!

I am a beginner and am trying out an MQTT example on my nRF9161 DK that I recently bought in my Visual Studio Code on Windows 11. I am aware that the sample application is for the nRF9160, but I am still optimistic as the build was partially successful. The I get the following error:

C:/Users/phani/workspace/wifi_mqtt_test/src/main.c:4:10: fatal error: zephyr/modem/lte_lc.h: No such file or directory
4 | #include <zephyr/modem/lte_lc.h>
| ^~~~~~~~~~~~~~~~~~~~~~~

 

I looked into the include files and I found that the lte_lc.h file needed for this program is missing:

The version of command line tools that I'm using is v2.7.0-rc3 which is the latest as of 3/June/24.

Here are the include statements in the sample: 

#include <zephyr/kernel.h>

#include <zephyr/net/mqtt.h>

#include <zephyr/net/socket.h>

#include <modem/lte_lc.h>

Is there any way I can fix it?

[Charlie]

Hi Phani,

Do you mean this sample? MQTT — nRF Connect SDK 2.7.0 documentation (nordicsemi.com)

It actually supports nRF9161DK. I suggest retry with NCS v2.7.0 since it is the official release now.

C:\NCS\v2.7.0\nrf\samples\net\mqtt>west nrf9161dk/nrf9161/ns
usage: west [-h] [-z ZEPHYR_BASE] [-v] [-V] <command> ...
west: unknown command "nrf9161dk/nrf9161/ns"; workspace C:\NCS\v2.7.0 does not define this extension command -- try "west help"

C:\NCS\v2.7.0\nrf\samples\net\mqtt>west build -b nrf9161dk/nrf9161/ns 
-- west build: generating a build system
Loading Zephyr module(s) (Zephyr base): sysbuild_default
-- Found Python3: C:/NCS/toolchains/ce3b5ff664/opt/bin/python.exe (found suitable version "3.9.13", minimum required is "3.8") found components: Interpreter
-- Cache files will be written to: C:/NCS/v2.7.0/zephyr/.cache
-- Found west (found suitable version "1.2.0", minimum required is "0.14.0")
-- Board: nrf9161dk, Revision: 0.9.0, qualifiers: nrf9161/ns
Parsing C:/NCS/v2.7.0/zephyr/share/sysbuild/Kconfig
Loaded configuration 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/_sysbuild/empty.conf'   
Merged configuration 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/_sysbuild/empty.conf'   
Merged configuration 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/_sysbuild/empty.conf'   
Configuration saved to 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/zephyr/.config'       
Kconfig header saved to 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/_sysbuild/autoconf.h'-- 
   **************************
   * Running CMake for mqtt *
   **************************

Loading Zephyr default modules (Zephyr base).
-- Application: C:/NCS/v2.7.0/nrf/samples/net/mqtt
-- CMake version: 3.21.0
-- Using NCS Toolchain 2.6.20240605.885759407716 for building. (C:/NCS/toolchains/ce3b5ff664/cmake)
-- Found Python3: C:/NCS/toolchains/ce3b5ff664/opt/bin/python.exe (found suitable version "3.9.13", minimum required is "3.8") found components: Interpreter
-- Cache files will be written to: C:/NCS/v2.7.0/zephyr/.cache
-- Zephyr version: 3.6.99 (C:/NCS/v2.7.0/zephyr)
-- Found west (found suitable version "1.2.0", minimum required is "0.14.0")
-- Board: nrf9161dk, Revision: 0.9.0, qualifiers: nrf9161/ns
-- Found host-tools: zephyr 0.16.5 (C:/NCS/toolchains/ce3b5ff664/opt/zephyr-sdk)
-- Found toolchain: zephyr 0.16.5 (C:/NCS/toolchains/ce3b5ff664/opt/zephyr-sdk)
-- Found Dtc: C:/NCS/toolchains/ce3b5ff664/opt/bin/dtc.exe (found suitable version "1.4.7", minimum required is "1.4.6")
-- Found BOARD.dts: C:/NCS/v2.7.0/zephyr/boards/nordic/nrf9161dk/nrf9161dk_nrf9161_ns.dts
-- Found devicetree overlay: C:/NCS/v2.7.0/nrf/samples/net/mqtt/boards/nrf9161dk_nrf9161_ns.overlay
-- Generated zephyr.dts: C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt/zephyr/zephyr.dts
-- Generated devicetree_generated.h: C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt/zephyr/include/generated/devicetree_generated.h
-- Including generated dts.cmake file: C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt/zephyr/dts.cmake

warning: Experimental symbol NET_CONNECTION_MANAGER is enabled.

Parsing C:/NCS/v2.7.0/nrf/samples/net/mqtt/Kconfig
Loaded configuration 'C:/NCS/v2.7.0/zephyr/boards/nordic/nrf9161dk/nrf9161dk_nrf9161_ns_defconfig'
Merged configuration 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/prj.conf'
Merged configuration 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/boards/nrf9161dk_nrf9161_ns.conf'
Merged configuration 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt/zephyr/.config.sysbuild'
Configuration saved to 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt/zephyr/.config'  
Kconfig header saved to 'C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt/zephyr/include/generated/autoconf.h'
-- Found GnuLd: c:/ncs/toolchains/ce3b5ff664/opt/zephyr-sdk/arm-zephyr-eabi/arm-zephyr-eabi/bin/ld.bfd.exe (found version "2.38")
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- The ASM compiler identification is GNU
-- Found assembler: C:/NCS/toolchains/ce3b5ff664/opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc.exe
CMake Warning at C:/NCS/v2.7.0/zephyr/kernel/CMakeLists.txt:170 (message):


          CONFIG_HEAP_MEM_POOL_SIZE is less than requested minimum:
            512 < 1024
          Setting the system heap size to 1024


CMake Warning at C:/NCS/v2.7.0/zephyr/CMakeLists.txt:2027 (message):
  __ASSERT() statements are globally ENABLED


-- Configuring done
-- Generating done
-- Build files have been written to: C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt
Dropping partition 'nonsecure_storage' since it is empty.
-- Configuring done
-- Generating done
-- Build files have been written to: C:/NCS/v2.7.0/nrf/samples/net/mqtt/build
←[92m-- west build: building application
[5/10] Performing build step for 'mqtt'
[4/349] Generating include/generated/version.h
-- Zephyr version: 3.6.99 (C:/NCS/v2.7.0/zephyr), build: v3.6.99-ncs2
[5/349] Generating ../../tfm/CMakeCache.txt
-- Found Git: C:/NCS/toolchains/ce3b5ff664/mingw64/bin/git.exe (found version "2.37.3.windows.1")
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- The ASM compiler identification is GNU
-- Found assembler: C:/NCS/toolchains/ce3b5ff664/opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc.exe
-- Found Python3: C:/NCS/toolchains/ce3b5ff664/opt/bin/python.exe (found version "3.9.13") found components: Interpreter
-- Found Python3: C:/NCS/toolchains/ce3b5ff664/opt/bin/python.exe (found suitable version "3.9.13", minimum required is "3.8") found components: Interpreter
-- Cache files will be written to: C:/NCS/v2.7.0/zephyr/.cache
-- Configuring done
-- Generating done
-- Build files have been written to: C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt/tfm 
[10/349] Performing build step for 'tfm'
[164/168] Linking C executable bin\tfm_s.axf
Memory region         Used Size  Region Size  %age Used
           FLASH:       32104 B        32 KB     97.97%
             RAM:       10424 B        32 KB     31.81%
[168/168] Generating ../bin/tfm_s.elf
[16/349] Performing install step for 'tfm'
-- Install configuration: "MinSizeRel"
----- Installing platform NS -----
[349/349] Linking C executable zephyr\zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:      185756 B       992 KB     18.29%
             RAM:       60612 B     195224 B     31.05%
        IDT_LIST:          0 GB        32 KB      0.00%
Generating files from C:/NCS/v2.7.0/nrf/samples/net/mqtt/build/mqtt/zephyr/zephyr.elf for board: nrf9161dk
[10/10] Generating ../merged.hex

Best regards,

Charlie

[Axlotl]

Hello!

Thanks for the reference, but I was using this sample previously:

nRF9160: Simple MQTT — nRF Connect SDK 1.5.1 documentation (nordicsemi.com)

I realize now I got the SDK version wrong. Ill try both ways, see which one fits for my use case.

Thanks for the info!

Best

Axlotl