https://devzone.nordicsemi.com/f/nordic-q-a/10126/can-i-execute-both-coap-server-and-mqtt-subscriber-on-one-nrf-51-dk[Dev Env] nRF51 DK IoT SDK 0.8 IoT SoftDevice [Question] i tested coap-server example. it works well. i will test mqtt-subscriber example. my question is coap-server and mqtt-subscriber can execute one nRF-51 DK. any one answer meen-USTelligent Community 13Mon, 09 Nov 2015 12:19:45 GMThttps://devzone.nordicsemi.com/thread/37554?ContentTypeID=1Mon, 09 Nov 2015 12:19:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a61e6820-69a5-4e7b-81c2-50129e1e4b93Petter Myhre<p>This isn&#39;t something we have tested, but we can&#39;t see any problems with doing it, but the memory management may require some tuning.</p> <p>On nRF51, memory may be a challenge. On nRF52 it may be much easier, but the IoT SDK for nRF52 is not available yet.</p> <p>You would need to merge the CoAP and MQTT examples that use the lwIP stack.</p><div style="clear:both;"></div>