Your sensor values aren't used to calculate anything, they are just printed via serial.
long Dehnung = 1;
long Ua = 0;
long Ub = 0;
//...
Dehnung = Ua - Ub;
0 - 0 = 0
Your sensor values aren't used to calculate anything, they are just printed via serial.
long Dehnung = 1;
long Ua = 0;
long Ub = 0;
//...
Dehnung = Ua - Ub;
0 - 0 = 0