Made prev_measurement in PID public

src/control/pid.rs

@@ -90,9 +90,9 @@ pub struct Pid<T: Number> {
     /// Limiter for the derivative term: `-d_limit <= D <= d_limit`.
     pub derivative_limit: T,
     /// Last calculated integral value if [Pid::i_gain] is used.
-    integral_term: T,
+    pub integral_term: T,
     /// Previously found measurement whilst using the [Pid::next_control_output] method.
-    prev_measurement: Option<T>,
+    pub prev_measurement: Option<T>,
 }
 
 impl<T> Pid<T>