https://devzone.nordicsemi.com/f/nordic-q-a/74203/software-update-using-mcuboot-from-another-mcuHi! In our current project, we have started to use the Connect SDK. We have a an application CPU with a modem running our main software and uses the nRF52833 for local connectivity and sensor hub. Our plan is to FOTA update the nRF by downloadingen-USTelligent Community 13Wed, 21 Apr 2021 13:50:28 GMThttps://devzone.nordicsemi.com/thread/306140?ContentTypeID=1Wed, 21 Apr 2021 13:50:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5dfc6957-80b2-490e-a036-ac43e8ad0240Carl Richard<p>Hello,&nbsp;ecsfang!<br /><br />Thanks for reaching out. What comes to mind here is the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/device_mgmt/index.html">management subsystem</a>&nbsp;of Zephyr, which based on the Simple Management Protocol (SMP). The Zephyr specific bindings for SMP can be found at <a href="https://github.com/nrfconnect/sdk-zephyr/tree/master/subsys/mgmt/mcumgr">zephyr/subsus/mgmt/mcumgr</a>, with implementation for serial transfer. Using this you should be able to implement a SMP client on your application MCU that can interact with the nRF52, running the&nbsp;<a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/subsys/mgmt/mcumgr/smp_svr/README.html#smp-svr-sample">SMP server sample</a>.<br /><br />We don&#39;t have much in terms of sample code for this, but you could look into the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/central_dfu_smp/README.html">Central DFU SMP sample</a>&nbsp;which implements a BLE SMP client. In addition <a href="https://devzone.nordicsemi.com/f/nordic-q-a/70419/upgrade-firmware-from-gateway-to-node-over-using-nrf-connect-sdk">this case</a> may be relevant when it comes to encoding.<br /><br />Best regards,<br />Carl Richard</p><div style="clear:both;"></div>