https://devzone.nordicsemi.com/f/nordic-q-a/69505/sensor-server-with-lc-clientcan You explain light_lc_client_light_onoff_set(&amp;m_clients[0], &amp;set_params,&amp;transition_params); This command in the lc client used to make the immediate on the server or with state transitions(fade on,standby etc..) if that s for immediate on whichen-USTelligent Community 13Tue, 15 Dec 2020 16:37:27 GMThttps://devzone.nordicsemi.com/thread/285163?ContentTypeID=1Tue, 15 Dec 2020 16:37:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:227df4c0-4458-4fcc-9e6d-28c662a62cd7Mttrinh<p>Hi,</p> <p>That function will set the light ON or OFF. You can adjust the transition time by setting this value&gt;0:&nbsp;<span>transition_params.transition_time_ms = 0;</span></p> <p><span>I suggest you read through this <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.meshsdk.v5.0.0/md_examples_light_lc_server_README.html?cp=7_2_3_7" rel="noopener noreferrer" target="_blank">example</a> for a more detailed explanation&nbsp;regarding the LC example. Under <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.meshsdk.v5.0.0/md_examples_light_lc_server_README.html#light_lc_server_example_testing_interacting" rel="noopener noreferrer" target="_blank">Interacting with the boards</a> you can see what happens through the different states and how you can adjust the transition times.</span></p><div style="clear:both;"></div>