Tweet
Code:
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int Coil = 13; // the number of the Coil pin
int led = 10; // detection led can add a buzzer here
int analogPin = 0; // pin to read the samples
int cSamples = 20; // how much samples are taken the lower its set the faster the samples more ustable though 10 min
int SampleDelay = 0; // delay before gathering the samples adjustable via the buttons
int SampleCounter = 0;
float tempc = 0.0f;
float Sensor = 1.0f; // default sensor offset adjustable via buttons
float testresults = 0.0f;
float cal = 0.0f; // store the calibration setting
float val = 0.0f;
float readSamples = 0.0f;
float results = 0.0f;
bool calibrate = false;
int button_up_Sensor = 7;
int button_down_Sensor = 6;
int button_up_SampleDelay = 9;
int button_down_SampleDelay = 8;
void setup ()
{
lcd.begin(16, 2);
pinMode(Coil, OUTPUT);
pinMode(led, OUTPUT);
pinMode (A0, INPUT);
Serial.begin (115200);
}
void loop ()
{
digitalWrite(Coil, HIGH);
delayMicroseconds(50); // how long the gate is open to charge the coil
digitalWrite(Coil, LOW);
delayMicroseconds(SampleDelay);
for(int i = 0; i < cSamples; i++)
{
val = analogRead(analogPin);
readSamples+=val;
val = 0.0f;
}
results = (readSamples/cSamples);
if(results < 0.0f)
{
results = fabsf(results); // if the results are - flip them to +
}
if(SampleCounter <= cSamples)
{
tempc += results; // recast to a int easy to deal with the display
SampleCounter++;
}else
{
if(calibrate == false)
{
cal = tempc/cSamples;
calibrate = true;
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 1);
lcd.print("CL ");
lcd.print(cal);
}
testresults = tempc/cSamples;
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print("DP ");
lcd.print(testresults);
digitalWrite(led, LOW);
if(cal > (testresults + Sensor) || cal < (testresults - Sensor)) digitalWrite(led, HIGH);
tempc = 0;
SampleCounter = 0;
}
readSamples = 0.0f;
if(digitalRead(button_up_Sensor) == HIGH)
{
Sensor+=0.1f;
lcd.setCursor(10, 0);
lcd.print(" ");
lcd.setCursor(10, 0);
lcd.print("SN ");
lcd.print(Sensor);
digitalWrite(Coil, LOW);
delay(200);
}
if(digitalRead(button_down_Sensor) == HIGH)
{
Sensor+=-0.1f;
lcd.setCursor(10, 0);
lcd.print(" ");
lcd.setCursor(10, 0);
lcd.print("SN ");
lcd.print(Sensor);
digitalWrite(Coil, LOW);
delay(200);
}
if(digitalRead(button_up_SampleDelay) == HIGH)
{
SampleDelay++;
lcd.setCursor(10, 1);
lcd.print(" ");
lcd.setCursor(10, 1);
lcd.print("SM ");
lcd.print(SampleDelay);
digitalWrite(Coil, LOW);
delay(200);
calibrate = false;
}
if(digitalRead(button_down_SampleDelay) == HIGH)
{
SampleDelay--;
if(SampleDelay < 0)SampleDelay = 0;
lcd.setCursor(10, 1);
lcd.print(" ");
lcd.setCursor(10, 1);
lcd.print("SM ");
lcd.print(SampleDelay);
digitalWrite(Coil, LOW);
delay(200);
calibrate = false;
}
}
Comment