app_timer_cnt_get() error

[Marcos Tadeo]

hi 

i have this error 

.\_build\nrf52840_xxaa.axf: Error: L6218E: Undefined symbol app_timer_cnt_get (referred from max30105.o).

in this code part.

the example is here: https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/using-millis-like-in-arduino

i included the app_timer.h but i have no idea what happen

could you help me please.

[Marte Myrvold]

Hi,

Have you added the source file to your project? Is the app_timer enabled in sdk_config.h?

Best regards,

Marte

[Marcos Tadeo]

hi Marte

yes I have added the source file , and I have no idea how to enable app timer in sdk_config.h

I changed the  APP_TIMER_CONFIG_LOG_ENABLED to 1 

but no works, shows the same error