Last question 
Thank you again for your help above. That works nicely!! This forum motivates me to do something different.
In my current project, I wanted to replace the buttons with touch-capacitive TTP223 buttons because the regular buttons don’t look very appealing.
Like this topic
However, I’m not getting any signals. I shared the diagram with you. Where do you think I might be making a mistake?
PS: TTP223 is in default mode. Not in an A or B or both.
