Infinite GATT connection

[Jackxl]

Hi,

Is it possible to make infinite GATT connection ? I set auto connect in android central app and my program in nrf51DK works. But only 4 hours.

Hardfault is almost regularly occured after 3h45min or 4h and I realy don't know what.

I need infinite gatt connection.

[Kenneth]

We are not aware of any issues in the softdevice that may prevent infinite GATT connection. Likely your application is doing an operation that for instance overflow after a few hours, and thereby you do an illegal operation that cause the chip to hardfault. Maybe you are able to set a breakpoint in the hardfault handler, read out the CPU registers, thereby you can find the program counter (pc) that cause the fault in the first place.

What SDK and SD are you using?

[Jackxl]

Hi,

my aplication is easy. My application only sending notification for one characteristic to android phone each 10minutes after connection is established. Nothing else, there is no thing which can overflow. I using SD7 and SDK7.2.

[Turbo J]

How are we supposed to help you? We are not psychic, so we actually need to read your source code - which is the most likely cause of your problems.

[Jackxl]

OK. I wll send you code to private message, when I will be home. I don't want this code as public.

[Turbo J]

Don't. I won't review private code without payment.

[Kenneth]

How have you implemented sending one characteristic every 10minutes? By default the max prescaler for app_timer allow about 4minutes before it will wrap around.