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sending ASCII bytes through Mesh between a nrf52840 development kit and two dongle

Hello everyone,

I am new and tried some example on the nrf52840 devkit and dongle, including light switch example. 

I am now going to send some ASCII bytes through the mesh between three boards and receive a verification message in the client side.

Actually I thought this is done by adding  sent and receive functions in the switch light example (server and client) inside the main.c. But after searching the devzone I was completely confused.

I read these discussions but I could not modify the code correctly.

https://devzone.nordicsemi.com/f/nordic-q-a/29836/send-and-receive-a-string-via-access-layer

https://devzone.nordicsemi.com/f/nordic-q-a/31256/receiving-simple-message-mesh/123576

https://devzone.nordicsemi.com/f/nordic-q-a/39629/how-to-send-data-to-all-node-over-mesh

https://devzone.nordicsemi.com/f/nordic-q-a/47611/sending-data-over-the-mesh-network

https://devzone.nordicsemi.com/f/nordic-q-a/46092/send-string-in-a-mesh-with-nrf52dk/

I have error on 

simple_message_OPCODE_SEND
and
the address_set function
and also in the server side:
status= access_model_publish(m_server.model_handle, &msg);

I think there are some different in the new version of the nRF52 SDK for mesh V.5 I used.

Could you please help me on this topic.

Thank you,

Sama