Mesh: set Message Destination Address

[arunbm123]

hi,

How can i set Destination Address to a particular Mesh Node. so that all message reach that particular Node Only.Since provisioner can set address while provisioning process. 

reply is appreciated. .

[Bjørn Kvaale]

You can use the unicast address to send a message from one node to an element in another node. During provisioning, each element in a node is assigned a unicast address. When you then send a message via the unicast address, only the element with that particular unicast address will read the message.

For example, in the light switch example in the newest mesh sdk v2.0.1, when you test this example with three boards (one provisioner, one client & one server), when you press button 2 on the client board, this refers to case 1 in button_event_handler() function in main.c in the client example. This then calls the simple_on_off_client_set() function, which then sends a message through the send_reliable_message() function.

In the server board, this unicast message gets picked up in the mesh_msg_handle() function inside access.c of the light switch server example. The handle_incoming() function then handles the unicast message to turn the LED on the server board on & off.

[priya123]

Yes I tried this Example...Works Fine...

My Question is if I have 100 nodes and I want to send Messages only to 50th Node..is it possible ? Since Provisioner Assigns the unicast address .What address is assigned to 50th Node we dont know....

[arunbm123]

yes the example s working

[Bjørn Kvaale]

If you are able to open an rtt viewer window for the client & the server nodes, you can see that the unicast node addresses get printed in the provisioning_complete_cb() function in main.c:

    dsm_local_unicast_addresses_get(&node_address);
    __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "Node Address: 0x%04x \n", node_address.address_start);

of the light switch client & server examples in Mesh SDK v2.0.0 for example.

[beparas]

Hi arunbm123

How do you set "unicast address 50" in  button_event_handler() function in client code.

[Bjørn Kvaale]

beparas Could you please open a new devzone question please.