Message when button is not clicked anymore

[Enigma]

Hello,
I'm really new to this. I started 4 days ago.
I'm building a bluetooth controlled car with an arduino
And wanted to make an app to control the car.
What I want is that when I click on a button...say forward
Then the bluetooth sends a string "f"
That much I can do
However when I stop clicking it... I want to send a string "s". Which I fail to do so.
I was using the touch.up command

Thanks

[Taifun]

What about trying a search in the community to find some examples? For example

App Crash Remote Control App

Thank you I just edited the code and it does work now, it no longer crashes and the up-down buttons don't disrupt the left and right ones thank you very much, and can confirm it does continuously send the desired code as the error Bluetooth not connected keeps popping up when buttons are held. (I haven't connected to the device yet so that's why Bluetooth errors occur will try to connect it later). Again, Thank you very much [blocks (1)]

Taifun