nRF52810 crash within 1 day of idle (sd_app_evt_wait) with every 4s advertising.

[iTXS]

Hi, I using nrf52810 with custom BLE profile and 4 sec advertising + continuous RTC. Device is battery powered (750 mAh) and PMDC motor equipped. Most of time (90% of day) it sleep with sd_app_evt_wait continuously checking state if turn-on button or connection of battery charger or BLE connection. After 8..20 hours of sleeping the firmware crashes. Within 3 hours after reset it dont crash.

[Martin Lesund]

Hi Timur,

Are you able to debug your device?

Could you maybe provide a little more information about your setup and whats happening?

what do you mean by firmware crashes? 

What SDK version/softdevice version are you using?

What example are you using as reference?

Please provide the different connection parameters.

 

[iTXS]

Yes, my setup is JLink EDU connected through SWD to nRF52810.

"Crashing" means that device not able to turn-on after sleep until I hardware reset it.

I using nRF5 SDK v14.2.0, code exampe is "BLE template project", PCB example is layout from datasheet.

Softdevice is S112.

My BLE connection is disabled when device sleeps. But I could wake up device through connect to it from my phone which see advertising packets.

[Martin Lesund]

Hi Timur,

Through debugging, do you get any errors or asserts?

Please enable "RTT logging" and increase the "default severity level" in "sdk_config.h" to get out information about what happens when the device "crashes". 

What have you added in the Template project? (what is your application supposed to do?)

[iTXS]

Hello, I set debug level to 4, and left the device for holidays. But there is no any text except that i already saw when turn device to sleep. I added many files to template project, my app has SAADC-based battery capacity calculation algorithm (work if device turned on) that uses picewise interpolation of battery discharge curve points, button/endstop and external capacitive sensor ic control that uses "app_button" library, sound buzzer, pmdc motor PID double direction control by PWM, motor feedback by measuring time with transflective optical sensor, bluetooth (adv+connection with IAS, BAS, my custom service, DIS), device has some settings that I saving in and read of GPREGRET2 register, RTC date and time callback by "app_timer" library. Also if I dont connect a debugger - it will crash. Maybe bug in a Logging module? nrf_log

[Martin Lesund]

Hi Timur,

Can you replicate the issue while debugging? I need to know what errors/asserts are thrown. 

Also what is you logger module's configuration?

How are you waking up the device?