Trigging qlc+ by gpio help needed

[lucasto]

Hi All,
I would like to trig cues by gpio but I can not properly patch the input;
I run 4.10.5b version raspberry image on a rpi3, I positively configure the gpio number to be used as input in the inputs/outputs layout and then use a button connected to that gpio pin and a ground pin but I have no reaction, no joystick icon in the universe label. I tried different pins with no result at all, do you have any hint ?
all the best
Luca

[FoxOne]

Luca,
Put 3.3v to the gpio pin and you are good.
It has to be a HIGH signal.

[FoxOne]

A 220ohm resistor wouldn't be a bad idea

[lucasto]

Hi FoxOne, thanks for replay, I gave 3v from the same raspberry and I had a reaction although it take the command as double click ( I set a button from gpio in and 3v gpio, pushing once the botton the joystik icon flash two times )
By the way I would like to trig qlc from a second raspberry giving the 3v, I try to set that second gpio raspberry as on but no result. Have to connect in some way the heart?
thanks in advance and forgive my english
all the best
Luca

[asm]

You need to have a commen ground.