hydroponic-controller/include/flow.h

#ifndef _FLOW_H_
#define _FLOW_H_

mqttValueTiming timing_flow_a;
mqttValueTiming timing_flow_b;

#define FLOW_A_PIN 16
#define FLOW_B_PIN 17
uint16_t flow_a_counter=0; //maximum counts/s measured with Eden 128 Pump was 171
uint16_t flow_b_counter=0; //maximum counts/s measured with Eden 128 Pump was 171
void IRAM_ATTR isr_flow_a();
void IRAM_ATTR isr_flow_b();
unsigned long last_read_flow_a=0;
unsigned long last_read_flow_b=0;
#define READINTERVAL_FLOW 10000
float flow_factor=7.5; //F=7.5*flowrate[L/min]
float flow_a;
float flow_b;

uint32_t flow_a_counter_sum=0;
uint32_t flow_b_counter_sum=0;



void flow_setup() {

  timing_flow_a.minchange=0.0;
  timing_flow_a.maxchange=0.3;
  timing_flow_a.mintime=10*1000;
  timing_flow_a.maxtime=30*60*1000;

  timing_flow_b.minchange=0.0;
  timing_flow_b.maxchange=0.3;
  timing_flow_b.mintime=10*1000;
  timing_flow_b.maxtime=30*60*1000;

  pinMode(FLOW_A_PIN, INPUT_PULLUP);
  pinMode(FLOW_B_PIN, INPUT_PULLUP);
  attachInterrupt(FLOW_A_PIN, isr_flow_a, CHANGE);
  attachInterrupt(FLOW_B_PIN, isr_flow_b, CHANGE);
}

void flow_loop(unsigned long loopmillis) {
  if (loopmillis>=last_read_flow_a+READINTERVAL_FLOW) {
    flow_a=flow_a_counter*1000.0/(loopmillis-last_read_flow_a)/2.0; //Frequency [Hz]
    flow_a/=flow_factor; //[L/min]
  
    flow_a_counter=0;
    last_read_flow_a=loopmillis;  
  }

  if (loopmillis>=last_read_flow_b+READINTERVAL_FLOW) {
    flow_b=flow_b_counter*1000.0/(loopmillis-last_read_flow_b)/2.0; //Frequency [Hz]
    flow_b/=flow_factor; //[L/min]
  
    flow_b_counter=0;
    last_read_flow_b=loopmillis;  
  }
}

void IRAM_ATTR isr_flow_a() {
	flow_a_counter++;
  flow_a_counter_sum++;
}


void IRAM_ATTR isr_flow_b() {
	flow_b_counter++;
  flow_b_counter_sum++;
}


#endif