Hello. I'd like to make sure there is no confusion about the N8ME firmware. I was not involved with the development of the N8ME firmware in any way.?
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I am only a guy who added a day/night mode feature, with permission, to N8ME's already great firmware. :) My modded version, "uBITX_6_N8ME_2_Nite_HW.zip" just has some changes to be able to switch to a red-only color pallet, by holding the knob button in while turning the radio on. As a complete "hack" at programming, it is possible that I broke or changed something in his original program.
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There is a file in the software which lets you enable and disable certain functions. The Arduino's memory is too small to allow all functions at the same time, so he included a way to select what features you would like to use and disable the ones you don't. It is possible that memory slots are not enabled.
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I suggest installing the original N8ME v.2 firmware and test it. If you install the Arduino IDE (programming software), you can find the file with the setup parameters to make sure memory slots are enabled.
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It's a fun radio and N8ME made a great firmware.
Ed K.