Problem with the Friend Node PollTimeout setup

[Jesper W.]

There is an "error" in the Mesh 4.00 friend.c:friendship_alloc(..) function, when allocating a new friend with PollTimeout greater than 2147 seconds.
The LPN allows you to set it to max  defined by MESH_LPN_POLL_TIMEOUT_MAX_MS (approx. 95,9 hours ) , but the Friend node is not supporting it.

else if (MS_TO_US(poll_timeout_ms) > FRIEND_POLL_TIMEOUT_MAX_US)
{
    /* TODO: Long running timer. */
    return NRF_ERROR_NOT_SUPPORTED;
}

How do I prevent the Friend node from terminating a friendship and flushing the queue if a LPN sleep for longer than 2147 seconds, eg. 94 hours using the mesh_lpn_poll_interval_set() ?

[Joakim Jakobsen]

Hi. 

This is mentioned as part of the Known issues for the nRF5 SDK for Mesh v.4.0.0. 

As far as I know we don't have a workaround for this at the moment, but this should be fixed in a future release of the SDK.

Best regards, 
Joakim Jakobsen