@inhar You must be on a PanelDue firmware version that already supports upgrades via M997 S4. If you are, you should be able to specify the firmware filename via M997 S4 P"PanelDueFirmware-XXX.bin". If you want to update PanelDue via DWC using the normal update prompt, you must rename the correct firmware file to PanelDueFirmware.bin before you upload it on the System page.