https://devzone.nordicsemi.com/f/nordic-q-a/64455/thingy91-how-to-update-modem-firmware-with-mcumgr-or-similar-terminal-toolmcumgr seems to not like the hex files in mfwnrf9160120.zip, and the NRF programmer can&#39;t be plugged into anything automated such as CI, and I&#39;m also running into https://devzone.nordicsemi.com/f/nordic-q-a/64132/nordic-thingy91-error-updating-modem-firmwareen-USTelligent Community 13Mon, 03 Aug 2020 13:25:16 GMThttps://devzone.nordicsemi.com/thread/262816?ContentTypeID=1Mon, 03 Aug 2020 13:25:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:64bc4acb-3b54-41fc-9774-abe4aeec80d9Heidi<p>Hi!</p> <p>Unfortunately, we don&#39;t offer any sort of tool for performing modem DFU over USB to the Thingy:91 at the moment.</p> <p></p> <p>mcumgr only works for application updates, not modem FW. And unfortunately, the existing solution we offer (using nRF Connect Programmer application) does not work on Windows for the Thingy:91 version 1.0.0, only version 1.0.2 and higher. On macOS and Linux there is a bug that we are working to fix, so this should work in the future. But the Programmer application does not offer CLI.&nbsp;</p> <p></p> <p>If you are willing to use a JLink debugger, we have the <a href="https://github.com/NordicSemiconductor/pynrfjprog">pynrfjprog</a> tool, which will let you perform a modem FW update via CLI.</p> <p></p> <p>Best regards,</p> <p>Heidi</p><div style="clear:both;"></div>