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Conductivity_Temperature_Time.ino
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Conductivity_Temperature_Time.ino
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#include <avr/sleep.h>
#include <avr/power.h>
#include <EEPROM.h>
volatile int interval = 0;
int eepromByte = 0;
boolean toggle = false;
void setup() {
// Serial.begin(9600);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
delay(2000);
noInterrupts();
TIMSK2 = 0;
ASSR |= (1 << AS2);
TCCR2A = 0;
TCCR2B = 0;
TCNT2 = 0;
while (ASSR & 0x1F) {};
TCCR2B |= (1 << CS22) | (1 << CS21) | (1 << CS20);
TIFR2 = 0x07;
TIMSK2 |= (1 << TOIE2);
interrupts();
}
ISR(TIMER2_OVF_vect) {
interval+=1;
}
float conductivity() {
int circReturn = 0;
int resReturn = 0;
float sumConductivity = 0.0;
float meanConductivity = 0.0;
float circCurrent = 0.0;
uint8_t i = 0;
for(i = 0; i < 10; i++) {
digitalWrite(5, toggle);
digitalWrite(6, !toggle);
delay(1);
circReturn = analogRead(A4) - analogRead(A5);
resReturn = analogRead(A4) - analogRead(A3);
circCurrent = resReturn / 560;
sumConductivity += circCurrent / (float)(circReturn - resReturn);
toggle = !toggle;
}
digitalWrite(5, LOW);
digitalWrite(6, LOW);
meanConductivity = sumConductivity / i;
return meanConductivity;
}
uint8_t temperature () {
int outReturn = 0;
int thermReturn = 0;
uint8_t pctReturn = 0;
digitalWrite(7, HIGH);
outReturn = analogRead(2);
thermReturn = analogRead(1);
pctReturn = thermReturn * 200 / outReturn;
digitalWrite(7, LOW);
return pctReturn;
}
void logInt(uint16_t data) {
uint8_t LowByte = data & 0xFF;
uint8_t HighByte = (data >> 8) & 0xFF;
EEPROM.write(eepromByte, LowByte);
eepromByte++;
EEPROM.write(eepromByte, HighByte);
}
boolean logData() {
if(eepromByte > 1020) return false;
int conduct = 0;
uint8_t temp = 0;
conduct = (int)conductivity();
logInt(conduct);
eepromByte++;
temp = temperature();
EEPROM.write(eepromByte, temp);
eepromByte++;
return true;
}
void loop() {
set_sleep_mode(SLEEP_MODE_PWR_SAVE);
sleep_enable();
sleep_mode();
sleep_disable();
power_all_enable();
// Serial.println("Timer works");
if(interval >= 450) {
logData();
interval = 0;
delay(200);
}
}