Device getting Hard Reset when it gets disconnected due to going out of range

RE: Device getting Hard Reset when it gets disconnected due to going out of range

Vidar Berg — Fri, 18 Feb 2022 07:51:45 GMT

Hello Krish,

Yes, NRF_ERROR_INVALID_STATE indicates that ble_nus_string_send() was called after the connection was lost.

You can either ignore the error like this:

err_code = ble_nus_string_send(..);
if (err_code != NRF_ERROR_INVALID_STATE)
{
        APP_ERROR_CHECK(err_code);
}

Or you can verify the connection state before sending the data.

Documentation for the various return codes for ble_nust_string_send()::sd_ble_gatts_hvx() can be found here: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.api.v2.0.1/group___b_l_e___g_a_t_t_s___f_u_n_c_t_i_o_n_s.html#ga313fe43c2e93267da668572e885945db

Best regards,

Vidar

RE: Device getting Hard Reset when it gets disconnected due to going out of range

KrishNa — Fri, 18 Feb 2022 07:24:25 GMT

Hello Vidar,

Thanks for your reply. I tried debugging and found out that the reset was happening because of the following error NRF_ERROR_INVALID_STATE returned by the function ble_nus_string_send.

Do you have any idea why this issue is happening when going out of range?

Best Regards,

Krish

RE: Device getting Hard Reset when it gets disconnected due to going out of range

Vidar Berg — Wed, 19 Jan 2022 13:20:39 GMT

Hi Krish,

Are you able to get UART/RTT logs from this device, or can you attach a debugger to read the error code? Note that you can read the error code that lead to the reset from the from the app fault handler if you add 'DEBUG' to your preprocesor list (see Error module).

Best regards,

Vidar

RE: Device getting Hard Reset when it gets disconnected due to going out of range

KrishNa — Wed, 19 Jan 2022 12:51:07 GMT

Hi Vidar,

Thanks for the quick reply. unfortunately, i am not able to find the error code. I tried debugging by commenting the function, that send the data continuously and everything works fine. but when the function is enabled, it always resets on going out of range...

Any insights from this will be of great help.

Best,

Krish

RE: Device getting Hard Reset when it gets disconnected due to going out of range

Vidar Berg — Wed, 19 Jan 2022 10:13:12 GMT

Hello Krish,

My guess is that the send function is returning an error code which is then passed to the APP_ERROR_CHECK() macro and causing the error handler to reset the device (see Error module). Are you able to find out what the error code is?

Best regards,

Vidar