#include <Arduino.h>
#define DO_PIN A1
#define VREF 5000 //VREF (mv)
#define ADC_RES 1024 //ADC Resolution
//Single-point calibration Mode=0
//Two-point calibration Mode=1
#define TWO_POINT_CALIBRATION 0
#define READ_TEMP (20) //Current water temperature ℃, Or temperature sensor function
//Single point calibration needs to be filled CAL1_V and CAL1_T
#define CAL1_V (1800) //mv
#define CAL1_T (35) //℃
//Two-point calibration needs to be filled CAL2_V and CAL2_T
//CAL1 High temperature point, CAL2 Low temperature point
#define CAL2_V (1400) //mv
#define CAL2_T (10) //℃
const uint16_t DO_Table[41] = {
14460, 14220, 13820, 13440, 13090, 12740, 12420, 12110, 11810, 11530,
11260, 11010, 10770, 10530, 10300, 10080, 9860, 9660, 9460, 9270,
9080, 8900, 8730, 8570, 8410, 8250, 8110, 7960, 7820, 7690,
7560, 7430, 7300, 7180, 7070, 6950, 6840, 6730, 6630, 6530, 6410};
uint8_t Temperaturet;
uint16_t ADC_Raw;
uint16_t ADC_Voltage;
uint16_t DO;
int motor1 = 8;
int motor2 = 9;
int16_t readDO(uint32_t voltage_mv, uint8_t temperature_c)
{
#if TWO_POINT_CALIBRATION == 0
uint16_t V_saturation = (uint32_t)CAL1_V + (uint32_t)35 * temperature_c - (uint32_t)CAL1_T * 35;
return (voltage_mv * DO_Table[temperature_c] / V_saturation);
#else
uint16_t V_saturation = (int16_t)((int8_t)temperature_c - CAL2_T) * ((uint16_t)CAL1_V - CAL2_V) / ((uint8_t)CAL1_T - CAL2_T) + CAL2_V;
return (voltage_mv * DO_Table[temperature_c] / V_saturation);
#endif
}
void setup()
{
Serial.begin(115200);
pinMode(motor1, OUTPUT);
pinMode(motor2, OUTPUT);
}
void loop()
{
Temperaturet = (uint8_t)READ_TEMP;
ADC_Raw = analogRead(DO_PIN);
ADC_Voltage = uint32_t(VREF) * ADC_Raw / ADC_RES;
Serial.println("DO:\t" + String(readDO(ADC_Voltage, Temperaturet)/1000) + "\t");
if(readDO(ADC_Voltage, Temperaturet)/1000<=14){
digitalWrite(motor1, HIGH);
digitalWrite(motor2, HIGH);
delay(5000);
digitalWrite(motor1, LOW);
digitalWrite(motor2, LOW);
}
else{
digitalWrite(motor1, LOW);
digitalWrite(motor2, LOW);
}
delay(1000);
}