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IOT Timer Resolution ICMP example

Hi,

I'm using the ICMP example provided in SDK 15 to test the 6lowpan and wanted to check the RTT from the nrf52832 dev kit.

I managed to do so with the IOT Timer, I check the time when sending the ICMP packet and print the difference upon receiving it, I am using the iot_timer_wall_clock_get function on both cases and I configure the resolution in the sdk_config.h in the IOT_TIMER_RESOLUTION_IN_MS define.

However I cannot set a resolution under 5ms, otherwise the system crashes and the code does not run. I get

<error> app: Fatal error
<warning> app: System reset

Do you know how I can solve this issue? I would like to have 1 ms resolution for my tests.

Thank you