https://devzone.nordicsemi.com/f/nordic-q-a/7146/battery-level-characteristics-not-updatedI want to add a battery level characteristics to a custom service. Here is my approach: In main.c, I add a timer to update battery level periodically void data_update_timer_timeout_handler(void * p_context) { battery_level_update(&amp;m_sss);en-USTelligent Community 13Mon, 08 Jun 2015 12:53:22 GMThttps://devzone.nordicsemi.com/thread/25259?ContentTypeID=1Mon, 08 Jun 2015 12:53:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c7d7e3e0-3b00-4586-9593-3703e9fe5551MartinBL<p>Hi. Have you tested that your timer handler is working properly? E.g. by toggling an LED? Did you remember to increase <code>#define APP_TIMER_MAX_TIMERS</code> by one to accommodate for your additional custom timer?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/25258?ContentTypeID=1Wed, 20 May 2015 04:03:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ba6f5b99-baea-4bf2-bcfd-c06676f6f08fdiode<p>I started timer after timers_init(), but I didn&#39;t pasted that part in the question. I can confirm timer starting part worked.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/25257?ContentTypeID=1Wed, 20 May 2015 04:00:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fb540367-0771-4845-87a8-2b2663ed187cRK<p>Where do you start the timer?</p><div style="clear:both;"></div>