i know the LED is ok and A9 is OK. what should I expect with the output?
#include <PID_v2.h>
int led = 13;
#define PIN_INPUT A9
#define PIN_OUTPUT 0
// Specify the links and initial tuning parameters
double Kp = 0, Ki = 0, Kd = 0;
PID_v2 myPID(Kp, Ki, Kd, PID::Direct);
void setup() {...