Losing cloud connection, Thread CoAP Cloud example (SDK 0.11.0)

[Reto]

Dear Thread-experts,

I have troubles with your Thread CoAP Cloud example. I am using:

• Thread SDK V0.11.0
• Border Router V0.11.0, ethernet (not Wi-Fi)
• cloud_coap_client example, adapted that I send more data (buffer size =256bytes)
• Eclipse
• Preview DVK, V0.9.0

I observe that after a while (sometimes day, sometimes minutes), no data are sent to the cloud. I debugged and my FW is running find and I don't get any errors (function otCoapSendRequest() is executed without error). However, the data is not visible in the cloud. The only way to recover it is: erasing the FW on the Border Router Network-Co-Processor-Thread-Module (Preview DVK). After erasing and reprogramming the DVK with the NCP, I can send data again for a certain time, until it brakes down again.

What I have observed is: when I send only 64bytes (insted of 256bytes): it tends to run more stable (some samples are missing, but the system is recovering itself).

I send the 256bytes every 6 minutes.

How can I debug that issue in more detail?

Thank you, Reto

[Reto]

Hi Lukasz Duda,

The linking is the problem. Thank you for any help with this!

Linking target: _build/nrf52840_xxaa_thingsio.out
"make" -s --no-print-directory -f "../../../Nordic_nRFSDK/nRF_Thread_SDK0.11.0/components/toolchain/gcc/dump.mk" VARIABLE=CONTENT_TO_DUMP > _build/nrf52840_xxaa_thingsio.in
'C:/Program Files (x86)/GNU Tools ARM Embedded/4.9 2015q3/bin/arm-none-eabi-gcc' -O3 -g3 -mthumb -mabi=aapcs -L ../../../Nordic_nRFSDK/nRF_Thread_SDK0.11.0/components/toolchain/gcc -T./openthread_nrf52840.ld -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections --specs=nano.specs @_build/nrf52840_xxaa_thingsio.in -Wl,-Map=_build/nrf52840_xxaa_thingsio.map -o _build/nrf52840_xxaa_thingsio.out
../../../Nordic_nRFSDK/nRF_Thread_SDK0.11.0/external/openthread/project/lib/openthread_cli/ftd/armgcc/libopenthread-cli-ftd.a(cli_uart.cpp.o):(.rodata._ZTIN2ot3Cli6ServerE[_ZTIN2ot3Cli6ServerE]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info'
../../../Nordic_nRFSDK/nRF_Thread_SDK0.11.0/external/openthread/project/lib/openthread_cli/ftd/armgcc/libopenthread-cli-ftd.a(cli_uart.cpp.o):(.rodata._ZTIN2ot3Cli4UartE+0x0): undefined reference to `vtable for __cxxabiv1::__si_class_type_info'
../../../Nordic_nRFSDK/nRF_Thread_SDK0.11.0/external/openthread/project/lib/openthread/ftd/armgcc/libopenthread-ftd.a(dataset_local.cpp.o): In function `ot::MeshCoP::DatasetLocal::Clear()':
C:\Work\nRF52840_ThingsIO\Nordic_nRFSDK\nRF_Thread_SDK0.11.0\external\openthread\project\lib\openthread\ftd\armgcc/../../../../openthread/src/core/meshcop/dataset_local.cpp:63: undefined reference to `otPlatSettingsDelete'
../../../Nordic_nRFSDK/nRF_Thread_SDK0.11.0/external/openthread/project/lib/openthread/ftd/armgcc/libopenthread-ftd.a(dataset_local.cpp.o): In function `ot::MeshCoP::DatasetLocal::IsPresent() const':
C:\Work\nRF52840_ThingsIO\Nordic_nRFSDK\nRF_Thread_SDK0.11.0\external\openthread\project\lib\openthread\ftd\armgcc/../../../../openthread/src/core/meshcop/dataset_local.cpp:68: undefined reference to `otPlatSettingsGet'