Logging node metadata over RTT

[samjaklic]

Hi, I am using Heartbeat messages with the light switch example, and want to log the nrf_mesh_rx_metadata_t in heartbeat_opcode_handle() to RTT viewer so I can write it to a file. I think I have to do this by attaching it to NRF_MESH_EVT_HB_MESSAGE_RECEIVED event, but I have tried and failed with many different methods. Does someone know a solution to this problem?

[Joakim Jakobsen]

Hi. 

want to log the nrf_mesh_rx_metadata_t in heartbeat_opcode_handle() to RTT viewer so I can write it to a file.

 Which data is it that you are interested in?

Your approach sounds correct. 
There is an unofficial example using heartbeat messages available on devzone that you can take a look at. (https://devzone.nordicsemi.com/f/nordic-q-a/39270/ble-mesh-heartbeat-example/)

 

but I have tried and failed with many different methods.

 Depending on which data you are interested in, how did you try to solve this?

Best regards

[samjaklic]

I am mostly interested in logging the RSSI, and the two nodes that were involved in the heartbeat (sent, received). Each way that I try to call the logging subroutine, it causes a compile-time error. Is there example code of how to send this information to the logger?

[Joakim Jakobsen]

I see. 

If you use the example in my previous post, adding this to your example should work for retrieving the RSSI. 

In heartbeat.c under the heartbeat_opcode_handle (), add:

evt.params.message.p_metadata = p_rx_metadata;

In main.c under the mesh_evt_cb() and the NRF_MESH_EVT_HB_MESSAGE_RECEIVED add: 

__LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "RSSI = %d\n", p_evt->params.message.p_metadata->params.scanner.rssi); 

This should print the RSSI for the heartbeat message you receive. 

Best regards, 
Joakim.