Ryan is definitely not the king, he just likes to have things personalised, thats all.
Sorry my friend... That was only a Joke
I think the Problem is a bit deeper.
Do Ryan have a Problem with the Text or with the Light itself ?
For me personaly its no matter if there is "Mobi Rocks" on it. Cause my "Sim experience" realy starts after i Run the Sim, run Mobi, Run the Homecockpit and so on....
So its no problem if there is written something before i start Mobiflight !
A Bigger Problem is the Backlight!
For A realistic Cockpit all Displays and LED are OFF aslong i power up the Master Battery Switch !
A 7 Segment can be blanked with Precondition ! But the Backlight of LCD Displays are ON all the time when Arduino have USB Power !
So... The Display Light up ( With or Without Text) full brightness.... Whatever my Aircraft is Cold and Dark !
And THATS finaly a Problem for me !
I Think a Software Solution is not possible with the Mobiflight GUI ( We would need a precondition that is specialy for backlight)
We talk about this in the past i think.
Do you know if there is a clear single Wire that is ONLY for Backlight but not involved in chip controll ?
If YES we can CUT it..... Set a Releas between.... And Controll the Relais with a Output Config....
Config got Master Battery Switch as Data....
Battery OFF = Offset 0 = Releais OFF = Power Cutoff to Backlight
Battery ON = Offset 1 = Releais ON = Power supported to Backlight
with my backlight, which is powered by a separate power supply, the power supply line can be cut and then switched via a relay controlled by the battery master switch. There I see no problem.
The backlight must be separated from the chip controll, because the chip controll runs with 5V, the backlight with 12V.
The proposal made by you should work, provided that the wiring is as mentioned above.