How to enable Child supervision in thread FTD

Question

Hello, 
 
 I am using nrf5 SDK for thread and zigbee. 
 I want to enable child supervision check on FTD and MTD devices. 
 For this I have already set OPENTHREAD_ENABLE_CHILD_SUPERVISION macro. 
 But on building the MTD example I am getting the following error. 
 Linking target: _build/nrf52840_xxaa.out
_build/nrf52840_xxaa/main.c.o: In function `_zipnet_process_init':
/../pca10056/blank/armgcc/../../../main.c:862: undefined reference to `otChildSupervisionSetCheckTimeout'
collect2: error: ld returned 1 exit status
../../../../../nrf_sdk_thread/components/toolchain/gcc/Makefile.common:292: recipe for target '_build/nrf52840_xxaa.out' failed
make: *** [_build/nrf52840_xxaa.out] Error 1

Marjeris Romero · Accepted Answer

Hi, 
 Did you set the OPENTHREAD_ENABLE_CHILD_SUPERVISION macro on the OT config and builded the OT stack again? Or did you change the macro only inside the project files? You need to build the OpenThread stack again in order to enable child supervision. 
 See ' How to enable child supervision ' page: 
 To enable Child Supervision, define OPENTHREAD_CONFIG_CHILD_SUPERVISION_ENABLE as 1 in the /src/core/config/child_supervision.h file, prior to building OpenThread . 
 Best regards, 
 Marjeris

How to enable Child supervision in thread FTD

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