hydroponic-controller/include/waterlevel.h

#ifndef _WATERLEVEL_H_
#define _WATERLEVEL_H_


#include <HCSR04.h>
#define HCSR04_PIN_ECHO 17
#define HCSR04_PIN_TRIGGER 16
#define HCSR04_TIMEOUT 5000 //default is 100000 (uS)
#define READINTERVAL_HCSR04 100

#define WATERLEVELMEAN_SIZE 32
float waterlevelMean[WATERLEVELMEAN_SIZE];
uint16_t waterlevelMean_pos=0;



void waterlevel_setup() {

  //HCSR04.begin(HCSR04_PIN_TRIGGER, HCSR04_PIN_ECHO);
  HCSR04.begin(HCSR04_PIN_TRIGGER, HCSR04_PIN_ECHO,HCSR04_TIMEOUT, HCSR04.eUltraSonicUnlock_t::unlockSkip);
  for (uint16_t i=0;i<WATERLEVELMEAN_SIZE;i++) {
    waterlevelMean[i]=-1; //-1 is also timeout value
    
  }
}

void waterlevel_loop(unsigned long loopmillis) {

  static unsigned long last_read_hcsr04;
  if (loopmillis>=last_read_hcsr04+READINTERVAL_HCSR04) {
    last_read_hcsr04=loopmillis;
    float temperature=20.0;
    if (tempC_air!=DEVICE_DISCONNECTED_C && isValueArrayOKf(tempCmean_air,TEMPMEAN_SIZE,DEVICE_DISCONNECTED_C)) { //sensor ok
      temperature=getMeanf(tempCmean_air,TEMPMEAN_SIZE);
    }
    
    double* distances = HCSR04.measureDistanceMm(temperature);

    waterlevelMean[waterlevelMean_pos]=distances[0];
    waterlevelMean_pos++;
    waterlevelMean_pos%=WATERLEVELMEAN_SIZE;
  }
}
#endif