MobiFlight Community Support

Hi Guys, I am looking for some advice as I am now getting brain damage thinking about this. I have an Arduino card linked up to MobiFlight. I don't have the faintest idea about writing code which is why I chose Mobiflight. It seems sorta simple. All I am trying to do is have the red LEDs light up when I lower the landing gear. ( transition, not locked) I have done the test and the circuit is fine but when I load P3Dv4 and press G to lower the gear, no lights come on. I'm guessing its a FSUIPC5 problem as the Output value and the FSUIPC value both say zero. Any help with this would be beneficial as I have hit a brick wall.

Hi Welcome to Mobiflight !

This are to less information. What Offset do you use... What Compare do you make ? Does your Hardware is correct set. ( Is LED light up in test mode) .... Are all entrys in Mobiflight correct and are the Devices set correctly ? What AddOn do you use ? Is your FSUIPC Up to date ?

By the way the Gear Transit Lights are a bit advanced. If you make your first steps i high recommend to make our Tutorial for Parking Brake Input and Output LED.

So please appology.... But i can´t see if the problem is technical or if you just make wrong inputs cause your experince is verry low at beginning.

It's a pleasure to be here. Finding people with the same interests as mine is always a pleasure. And may I say this is an outstanding program. It does simplify things a lot. I have used the offset from the drop down menu. I picked the one labelled Landing Gear Nose (moving). I haven't attempted to look at the compare, I still know too little about how it all works. I believe my hardware is set up correctly as the LEDs light up when I press test. I am assuming that all the entrys are correct although the Output Value and FSUIPC value both say zero when I hit run. I am using the PMDG 737 in P3Dv4. My FSUIPC5 wasn't up to date but is now. It hasn't resolved the problem. I went through the tutorial with the parking brake LED and it worked fine. (Great introduction and excellent as a learning tool ) I only have the Main Instrument Panel built so far so the Parking Brake will be quite a few steps away yet. I have used the same method for the landing light as I did with the parking brake but I guess I'm missing a few things. My apologies for appearing so inexperienced, my knowledge is limited but growing extremely fast extremely quickly. Two days ago, I didn't have any idea how to set a circuit up and now I've set one up that I can control from a P.C. I think I am on a massive learning curve.

Your Welcome !

Thats complete right. Mobiflight is a great tool and the people here are cool. And yes... you can learn a lot within the first days !

At first a important information:
Keep advise about AddOns. The basic technics are build for FSX (or P3d) standard aircrafts. AddOns like PMDG mostly NOT use the standard stuff. That means most of functions can NOT controlled by offsets from standard list ( or by the presets in Mobiflight). To work with this advanced Aircrafts you need individual informations and you must have a bit experience.

For your first steps i recommend to work with a standard aircraft that was include in your P3D.... If you already understand the basics then you be able to build a system for your AddOns ! ( Without that experience you not know... Is the problem the aircraft or is the problem a beginnerissue you did. )

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AND NOTE: The PRESETS in Mobiflight ( where you choose the "NoseGear-moving") are just a relict of the past.... thats more a example and not a solution !
For example here it use the correct Offset but it have no compare.... That means the LED will light if Gear is NOT Up.... But it not get off if Gear is Down ( like it should do) To use this "preset" you must edit it and enter some other settings (compare).
Summary.... Presets are NOT always a final working system..... Lots of this old presets not work 100%


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Finaly about your problem......

"Normaly" the Gear Transit should work in your PMDG wih that standard Offset, too. Above i said PMDG use own systems... But some basics like Parking Brake or Gear status "can" be used by standard offsets, too.
But "Maby" the FSUIPC 5 Updating last months ( P3D make a big update to 64bit system and FSUIPC, too) produce a issue.
In FSX it work fine.

To check if its a real problem or just a wrong use of you....
Please run Mobiflight and get shure the config is ACTIVE..... Then make a test with a P3D standard Aircraft ( NO PMDG) . Start a flight get in the air and run your gear UP-DOWN-UP-DOWN..... Does the Value in Mobiflight is chaning ?? it should be 0 if UP and 16383 if DOWN.

Please report !

Additional Note: In PMDG there exist own Offsets for the GEAR Lights.... If the other not work we can try this.... But please at first check out the things i said above.

Well after a full day of scratching my head and a chat on facebook, I have managed to resolve the problem. I knew it was something I was doing wrong. The gear movement indicator tutorial on here gave me all the information I needed to get it to work as it should. This is the link for it as I was unable to find it myself. A very kind man on Facebook gave me this link https://www.mobiflight.com/forum/topic/226.html Thank you so much for your help today, it really is good to know there are people out there I can learn from and receive help when I need it in this very daunting hobby.

Nice to hear....

My biggest recommendation for beginners is.... Not Copy/Paste a System LEARN und UNDESTAND how it work !

If you just use the compare " If Value is 16383 Then 0" then it work.... But you don´t know why !

So you MUST read the FSUIPC Lists for example to understand this Offset have a range of 0-16383
You must know youreself that this LED in a real aircraft must be OFF when Gear UP.... ON While Moving.... and OFF again while Gear Down !
Next step is maby to understand WHY the Value is exactly 16383 ! ... Cause this is Binary 0011 1111 1111 1111
If you also understand completly the Binary and HexaDecimal logics you THEN understand FSUIPC and the hole System !
( In my eys THIS is the Basic Knowledge to work with FSUIPC)

Decide youreself how deep you like to go.....