MobiFlight Community Support

Please forgive me, I'm a newbie and need advice! I am trying to setup the Landing Alt and Flight Alt on the PMDG737 using P3Dv5. The digits are displaying perfectly but I am struggling to get the rotary encoders working correctly. When I turn them I have to go through about five "clicks" before a value changes and this is not constant, sometimes I have to turn a complete rotation to get the digits to increase by 500 feet. Also, if I turn the encoder anti-clockwise the digits keep increasing and do not decrease as they should. I am using the PMDG-Event ID EVT_OH_PRESS_FLT_ALT_KNOB Event ID 69850 as well as the one for the Landing ALT. I am using Custom Parameter 0 for the "On Left" and "2 for the "On Right". I am sure there is something basic I'm missing, it seems the Arduino Mega is wired up correctly, 5V and Ground where they should be, and the other three wires to 2/3/4 inputs. Up until now I have used SIOC and Opencockpit cards, I'm new with Arduino/Mobiflight! Any help will be really appreciated!

Further to what I have said I have just found if I turn the encoder to the left 1 click it increases 500 feet, then to the right one click it increases 500 feet, then to the left again 1 click it increases another 500 feet and so on.......... I don't understand what's happening but I'm sure that's good news so far?

Hi
Welcome to Mobiflight !

One clear issue.... Maybe two !

1. Wrong Parameter.
The Custom Parameters (0,1,2,3 and so on) are used ONLY for Latching switches and Multiposition Rotary switches. Latching ON/OFF got 0=Off and 1=On.
Multiposition Switches mostly work from UP to DOWN or from LEFT to RIGHT.... Starting with 0.
For example the Engine Start Switch have 0 for GND 1 for OFF 2 for CONT and 3 for FLT.
The Momentary Buttons use as parameter always a LEFTCLICK .... The Number can be found in the PMDG EventID List... 536870912 in that case

FOR ENCODERS we not have a fixed position.... So Parameters like 0,1,2, will not work !
Here we use Mousewheel UP and DOWN parameters.... UP 16348 .... DOWN 8192
EDIT: In PMDG"u" and in some older ones we can also use LEft and Rightclick for Encoders. This increase the change of value by factor 5x. Fast Turn e.g.!

****
2. Wrong wirework maybe. A Encoder got 3 Lines normaly.... A , B , and GRD .... Some Encoders also use 5v so 4 pins overall.
If your encoder got 5 Pins ( Pretty sure a KY040 Encoder) then the 5th Pin is for the Push Button on the Encoder.
Please get sure you not wire it wrong way. If you say you have 3 Pins (2 3 4) then confirm you use the 2 Channles A B correctly for the Encoder and the third Pin is set as a BUTTON !

Hi Pizman82, thanks a million for the welcome and for your input! I am away tomorrow so I will carry on troubleshooting on Saturday and let you know how I get on. Thank you for pointing me in the right direction!

Hi Pizman, Thank you, Thank you, Thank you!

I changed the parameters and it is all working beautifully! Thank you for your quick and informative support, you are a star!

Have a super weekend!

Hello Pizman

could you help me . I have a problem with trim encoder for cokpit C172 MS2020 . I am using offset 0BC0 - Value type int - Size in Bytes 2 mask value FFFF and I set the value 1200 to have a correct number of turn with my virtual wheel. On left I put $ -1200 and on right I put $ +1200 but the wheel don't change the sense of rotation.
My encoders is HKT 1062 KY 040 with 5 pin ; I connect CLK on pin 7 and DT on pin 8 and the GRD to ground.

What is wrong . please help me

Hi

At first.... Check if Problem is located in Software or Hardware....

Just for testing.... Enable the "logging Mode" in Mobiflight Settings Tab! Typ: DEBUG
(Note just for testing.... Logging Mode slow down the system.... So not keep it activa all the time).

If there is a Left/Rigth Message in the Logging when turn the encoder, then it is detected.
If not ( i expect) then there is a electrical Issue !

Expected Problem:

My encoders is HKT 1062 KY 040 with 5 pin ; I connect CLK on pin 7 and DT on pin 8 and the GRD to ground.

KY40 Encoders are technical not perfect for Mobiflight.... We normaly work with Standard 3 Pin Encoders.
They will also work! BUT you need to also connect the 5V Pin to the Mega ! ( In case KY40 work in a other system and additonal need 5V ...: Thats why we not official recommend them)

Solution:

1. Check if Hardware is working
2. Rethink input system..... FSUIPC is outdated.... Yes it workes, but our new WASM tool ( Simconnect Inputs FS2020) work way better in the FS2020 instead of oldschool FSUIPC!
( Point 2 is not the nature of problem! But i recommend to go the "new" way !)