MobiFlight Community Support

Hello friends, I have made an TRANSPONDER. All is fine. But I have troubless to set the VFR button. It sets transponder freq. to 1200.
I have read all posts on forum, but no answer. Just that the offset is not vorking. I hav not found any offset for VFR button that sets the freq. to 1200. I am using arduino 256mega.
I would like to press the button to set transponder to 1200. There is CLEAR button that sets transponder to 0000. That is working. On the computer I see the button and it sets transponder to 1200 but using mobiflight I am not able to do that. Can anyone help with this? Thank you very much for help.

Hi

You miss to tell us what Sim and what aircraft you use.
For old Sims we only have FSUIPC..... For FS2020 we also got WASM access and can directly talk to the sim!

Also the used Aircraft is a factor. If this button not exist in the used aircraft (virtual) then it can not be controlled directly.
I also expect the stock aircrafts not have this function.... So there can not be exist a FSUIPC Offset or Event for this.
BUT
If it exist in a AddOn maybe the AddOn have own Events(Offsets) for that ( additional to the stock FSUIPC stuff)

Solution:
1. Check if your AddOn have a direct Event for this Button

2. You can try to SET the Transponder by hand.
E.g. in P3D there is a Offset for the current Transponder Code. Its writeable. So you can easy SET it to 1200.

E.g. this EventID ..... 65715 XPNDR_SET Use PArameter 1200 and try out