Central getting disconnected automatically after few seconds with 0x08 reason.

[ssc]

Hello,

I am using custom nrf52832 PCB as central role. Also i have the peripheral with similar board . Peripheral communication is working properly if connected with the mobile device. 

Where as the custom board with example code given by SDK V 15.2. The central gets connected with the peripheral . After 5-6 seconds appx. central gets disconnected from peripheral with 0x08 reason of event TIMEOUT. 

I have added debug logs to every possible disconnect event in both the central and peripheral code. But the log gets only at peripheral side with disconnection reason. where central does not give any error. I am not understanding the reason behind this. Can anybody tell what should i do?

[Vidar Berg]

Hello,

This could be a symptom of clock drift. Do you have an external 32KHz crystal on your custom board, or are you using the internal RC oscillator for the 'slow clock'? If you use the internal RC oscillator you need to set the clock accuracy to 500 ppm when you enable the Softdevice. 

[ssc]

Hello Vidar,

I am using external crystal on my board. Do i need to set any thing else.

Thanks and regards.

[ssc]

I have done debugging on code.Got following errors:

 <info> app: LED Button service discovered on conn_handle 0x0.<CR><LF>
<error> app: Fatal error<CR><LF>
<error> app: ERROR 3735928559 [Unknown error code] at <the project path>\components\libraries\button\app_button.c:186<CR><LF>
PC at: 0x0002DA9F<CR><LF>
<error> app: End of error report<CR><LF>

can you please suggest what should i do?

[Vidar Berg]

ssc said:

I am using external crystal on my board. Do i need to set any thing else.

 No, I think it's probably unrelated to clock drift since you are using a crystal. 

ssc said:

path>\components\libraries\button\app_button.c:186<CR><LF>
PC at: 0x0002DA9F<CR><LF>
<error> app: End of error report<CR><LF>

 Would be helpful to see your code for this. The error indicates that you've called app_button_enable() without configuring any buttons first.  

[awneil]

Vidar Berg said:

Would be helpful to see your code for this

Indeed.

How to properly post source code:

also use the same technique for posting logs - just leave the 'Language' as 'Text' (instead of changing to 'C')