Samantha,
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For portable use, doing everything through the front panel and and the small display there keeps power requirements low.
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> ?Wouldn't it be loverly if the next version of the QMX had a display like the zBitx.?
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May be possible to do all you want by adding an RPi-Zero and a screen of your choice into the top half of the QMX+ clamshell.
Hans plans to add more firmware features to the QMX, allowing more control via UART and USB.
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Jerry, KE7ER