Chat warning in ble mesh with nRF52840

Hello,

I have a ble mesh with a nRF52840 Eval board and a certain number of nRF52840 dongle nodes.

I communicate via mesh Chat between the Eval board and the nodes.

Till now all was perfectly working, but today, when the Eval board asks something to some nodes, it does not receive the correct answer, and I receive the following messages of warning on the serial channel (related to one node for example:

Warning: Replay: src 0x0004 dst 0x0010 seq 0x000018

Warning: Replay: src 0x0004 dst 0x0010 seq 0x000019

Warning: Replay: src 0x0004 dst 0x0010 seq 0x00001a

Warning: Replay: src 0x0004 dst 0x0010 seq 0x00001b

Warning: Replay: src 0x0004 dst 0x0010 seq 0x00001c

Warning: Replay: src 0x0004 dst 0x0010 seq 0x00001d

Warning: Replay: src 0x0004 dst 0x0010 seq 0x00001e

Note that:

  • the firmware is the same in all nodes, and
  • from all the nodes I received correctly till today.
  • with the majority of nodes the chat communication with Eval board keeps working well

What can be happened?

I need your precious help.

Thanks in advance

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