https://devzone.nordicsemi.com/f/nordic-q-a/94709/lwm2m-client-utils-certificate-usageHi, I m trying to set up a LwM2M Client with Security Mode 2. I m using the LwM2M client utils and add some changes to the LwM2M Client sample. In the function lwm2m_setup() i replaced lwm2m_security_set_psk(0, CONFIG_APP_LWM2M_PSK, sizeof(CONFIG_APP_LWM2M_PSKen-USTelligent Community 13Fri, 09 Dec 2022 13:30:36 GMThttps://devzone.nordicsemi.com/thread/399946?ContentTypeID=1Fri, 09 Dec 2022 13:30:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4d5e2af1-7c5d-4183-939c-0a825c1bc69eSigurd<p>Hi,</p> [quote user=""]<p>In the function lwm2m_setup() i replaced&nbsp;</p> <div> <div><span>lwm2m_security_set_psk(0, CONFIG_APP_LWM2M_PSK, sizeof(CONFIG_APP_LWM2M_PSK), true, endpoint_name);</span></div> <div><span>with&nbsp;</span></div> <div> <div><span>lwm2m_security_set_certificate</span><span>(</span><span>0</span><span>, </span><span>client_certificate</span><span>, </span><span>sizeof</span><span>(</span><span>client_certificate</span><span>), </span><span>client_key</span><span>, </span><span>sizeof</span><span>(</span><span>client_key</span><span>), </span><span>server_certificate</span><span>, </span><span>sizeof</span><span>(</span><span>server_certificate</span><span>));</span></div></div></div>[/quote] <p>It&#39;s not supported by the modem at this point. See the comments in this PR:&nbsp;<a href="https://github.com/nrfconnect/sdk-nrf/pull/8943">https://github.com/nrfconnect/sdk-nrf/pull/8943</a></p> <p>&nbsp;</p><div style="clear:both;"></div>