Introduzione
Instructions for updating the PanelDue firmware can also be found here
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Download the latest stable firmware from the Duet Github and extract the zip file
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Make sure you download the correct version. The PanelDue 5i and 7i both use the same firmware binary. The file you want is named "PanelDue-5.0i-7.0i.bin"
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You need to install "PanelDueFirmware-v3-7.0.zip" or "PanelDueFirmware-v3-5.0.zip"
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Download and install Bossa
 
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Hold the erase button on the back of the PanelDue
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Connect a USB Micro cable from your PC to your PanelDue. Release the erase button and press the reset button.
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Identify the COM port the PanelDue is using.
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Click Start->Control Panel->System->Device Manager. Expand Ports (COM and LPT)
 
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Once connected open Bossa.
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Select the port in the dropdown. Click Browse and select the PanelDue firmware
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Select the checkboxes for Erase all, Lock, and Boot from flash
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Click Write. Bossa will load the firmware to the PanelDue. Once upload is complete, click Verify.
 
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