#include "DHT20.h"
#define SERVO_PIN A3
#define LEVEL_UP_PIN A0
#define LEVEL_DOWN_PIN A1
#define HUMID_CHECK_PIN A2
#define LEVEL_CHECK_PIN 3
#define LED_PIN 2
#define ONBOARD_LED_PIN 13
// 0 blink ~ 40.0
// 1 blink 40.0 ~ 42.5
// 2 blinks 42.5 ~ 45.0
// 3 blinks 45.0 ~ 47.5
// 4 blinks 47.5 ~ 50.0
// 5 blinks 50.0 ~ 52.5
// 6 blinks 52.5 ~ 55.0
// 7 blinks 55.0 ~ 57.5
// 8 blinks 57.5 ~ 60.0
// 9 blinks 60.0 ~ 62.5
// 10 blinks 62.5 ~ 65.0
// 11 blinks 65.0 ~
#define NUM_LEVELS 11
#define INTERVAL 2.5f
#define HUMID_LEVEL0 40.0f
#define HUMID_LEVEL1 42.5f
#define HUMID_LEVEL2 45.0f
#define HUMID_LEVEL3 47.5f
#define HUMID_LEVEL4 50.0f
#define HUMID_LEVEL5 52.5f
#define HUMID_LEVEL6 55.0f
#define HUMID_LEVEL7 57.5f
#define HUMID_LEVEL8 60.0f
#define HUMID_LEVEL9 62.5f
#define HUMID_LEVEL10 65.0f
float LEVELS[NUM_LEVELS] = {
HUMID_LEVEL0, // 40.0 ~ 42.5 1 blink
HUMID_LEVEL1, // 42.5 ~ 45.0 2 blinks
HUMID_LEVEL2, // 45.0 ~ 47.5 3 blinks
HUMID_LEVEL3, // 47.5 ~ 50.0 4 blinks
HUMID_LEVEL4, // 50.0 ~ 52.5 5 blinks
HUMID_LEVEL5, // 52.5 ~ 55.0 6 blinks
HUMID_LEVEL6, // 55.0 ~ 57.5 7 blinks
HUMID_LEVEL7, // 57.5 ~ 60.0 8 blinks
HUMID_LEVEL8, // 60.0 ~ 62.5 9 blinks
HUMID_LEVEL9, // 62.5 ~ 65.0 10 blinks
HUMID_LEVEL10}; // 65.0 ~ 67.5 11 blinks
#define MIN_MODE_DURATION 180000 // 3 minutes
DHT20 DHT;
int currentLevel = 4; // 50.0 ~ 52.5 (5 blinks)
long modeInTime = -MIN_MODE_DURATION;
float getHumidity()
{
DHT.readStatus();
DHT.read();
#ifdef ARDUINO_AVR_UNO
float h = DHT.getHumidity();
Serial.print("hum=");
Serial.print(h);
Serial.print(" currentlev=");
Serial.print(currentLevel);
Serial.print(" onvalue=");
Serial.print(turnOnHumidityValue());
Serial.print(" offvalue=");
Serial.println(turnOffHumidityValue());
return h;
#else
return DHT.getHumidity();
#endif
}
float turnOnHumidityValue()
{
return LEVELS[currentLevel];
}
float turnOffHumidityValue()
{
return turnOnHumidityValue() + INTERVAL;
}
void moveToHomePosition(int numLoops=30, int delayPeriod=1000)
{
for (int j = 0; j < numLoops; ++j)
{
digitalWrite(SERVO_PIN, HIGH);
delayMicroseconds(500);
digitalWrite(SERVO_PIN, LOW);
delayMicroseconds(20000 - 500);
}
delay(delayPeriod);
}
void ledBlink(int num)
{
for(int i = 0; i < num; ++i)
{
digitalWrite(LED_PIN, LOW);
delay(300);
digitalWrite(LED_PIN, HIGH);
delay(300);
}
}
void blinkHumidLevel(float humidity)
{
int humidLevel = 0;
for (int i = 0; i < NUM_LEVELS; ++i)
{
if (humidity < LEVELS[i])
{
break;
}
++humidLevel;
}
ledBlink(humidLevel);
}
void pressSwitch()
{
for (int j = 0; j < 200; ++j)
{
digitalWrite(SERVO_PIN, HIGH);
delayMicroseconds(2400);
digitalWrite(SERVO_PIN, LOW);
delayMicroseconds(20000 - 2400);
}
moveToHomePosition();
}
bool isButtonPressed(int pin)
{
if (digitalRead(pin) == LOW)
{
delay(5);
if (digitalRead(pin) == LOW)
{
return true;
}
}
return false;
}
int numLevelChanges(float humidity)
{
int count = 0;
unsigned long start = millis();
while(millis() - start < 500)
{
if (isButtonPressed(LEVEL_UP_PIN))
{
++count;
while(digitalRead(LEVEL_UP_PIN) == LOW){}
start = millis();
}
else if (isButtonPressed(LEVEL_DOWN_PIN))
{
--count;
while(digitalRead(LEVEL_DOWN_PIN) == LOW){}
start = millis();
}
else if (isButtonPressed(HUMID_CHECK_PIN))
{
blinkHumidLevel(humidity);
return 0;
}
else if (isButtonPressed(LEVEL_CHECK_PIN))
{
ledBlink(currentLevel + 1);
return 0;
}
}
return count;
}
void handleButtons(float humidity)
{
int numChanges = numLevelChanges(humidity);
if (numChanges != 0)
{
currentLevel += numChanges;
currentLevel = min(max(currentLevel, 0), NUM_LEVELS - 1);
ledBlink(currentLevel + 1);
}
}
void turnOnMode()
{
#ifdef ARDUINO_AVR_UNO
static bool isOnBoardLedOn = false;
#endif
moveToHomePosition(); // beep;
pressSwitch(); // turn on;
float humidity = 0.0f;
modeInTime = millis();
while(humidity < turnOffHumidityValue() ||
millis() - modeInTime <= MIN_MODE_DURATION)
{
#ifdef ARDUINO_AVR_UNO
Serial.print("turnOnMode hum=");
Serial.print(humidity);
Serial.print(" off=");
Serial.print(turnOffHumidityValue());
Serial.print(" durationSec=");
Serial.println((millis() - modeInTime) / 1000);
#endif
isOnBoardLedOn = !isOnBoardLedOn;
digitalWrite(ONBOARD_LED_PIN, isOnBoardLedOn);
humidity = getHumidity();
handleButtons(humidity);
}
moveToHomePosition(); // beep;
pressSwitch(); // turn off
}
void setup()
{
#ifdef ARDUINO_AVR_UNO
Serial.begin(9600);
Serial.println("setup");
pinMode(ONBOARD_LED_PIN, OUTPUT);
digitalWrite(ONBOARD_LED_PIN, LOW);
#endif
pinMode(SERVO_PIN, OUTPUT);
pinMode(LEVEL_UP_PIN, INPUT_PULLUP);
pinMode(LEVEL_DOWN_PIN, INPUT_PULLUP);
pinMode(HUMID_CHECK_PIN, INPUT_PULLUP);
pinMode(LEVEL_CHECK_PIN, INPUT_PULLUP);
pinMode(LED_PIN, OUTPUT);
pinMode(SDA, INPUT); // LET DHT20 pull up the line
pinMode(SCL, INPUT); // LET DHT20 pull up the line
digitalWrite(LED_PIN, HIGH);
moveToHomePosition();
// Test servo position
pressSwitch();
delay(1000);
pressSwitch();
DHT.begin();
Wire.setClock(400000);
delay(1000);
blinkHumidLevel(getHumidity());
}
void loop()
{
#ifdef ARDUINO_AVR_UNO
digitalWrite(ONBOARD_LED_PIN, LOW);
#endif
float humidity = getHumidity();
#ifdef ARDUINO_AVR_UNO
Serial.print("turnOffMode hum=");
Serial.print(humidity);
Serial.print(" on=");
Serial.print(turnOnHumidityValue());
Serial.print(" durationSec=");
Serial.println((millis() - modeInTime) / 1000);
#endif
if (humidity < turnOnHumidityValue() &&
millis() - modeInTime > MIN_MODE_DURATION)
{
turnOnMode();
}
handleButtons(humidity);
}
