Humidity Tester

온도와 습도 그리고 배터리 전압을 출력한다.
Attiny85에 character LCD를 연결하여 사용하였다.

	/*
	Interactive nametag sketch for ATtiny85. Based on the Digispark
	ATtiny LCD example and the Adafruit "Measuring Sound Levels" example.
	Every 12000 milliseconds will change the display from my name to my website.
	On the second line, will measure and display sound levels.
	For more info check: https://platis.solutions/blog/2015/03/22/diy-interactive-name-tag/
	ATtiny85 I2C pins:
	ATtiny Pin 5 = SDA on DS1621 & GPIO
	ATtiny Pin 7 = SCK on DS1621 & GPIO
	*/
	// +-\/-+
	// Ain0 (D 5) PB5 1| |8 Vcc
	// Ain3 (D 3) PB3 2| |7 PB2 (D 2) Ain1
	// Ain2 (D 4) PB4 3| |6 PB1 (D 1) pwm1
	// GND 4| |5 PB0 (D 0) pwm0
	// +----+
	#include <TinyWireM.h> // I2C Master lib for ATTinys which use USI - comment this out to use with standard arduinos
	#include <LiquidCrystal_attiny.h> // for LCD w/ GPIO MODIFIED for the ATtiny85
	#include "DHT.h" //include DHT library
	#define GPIO_ADDR 0x3f
	LiquidCrystal_I2C lcd(GPIO_ADDR, 16, 2); // set address & 16 chars / 2 lines
	#define DHTPIN 3 //define as DHTPIN the Pin 3 used to connect the Sensor
	#define DHTTYPE DHT11 //define the sensor used(DHT11)
	DHT dht(DHTPIN, DHTTYPE);//create an instance of DHT
	const short micPin = A3;
	const short sampleWindow = 50; // Sample window width in mS (50 mS = 20Hz)
	const unsigned long nameInterval = 12000;
	unsigned long prevNameChange = 0;
	short state = 1;
	unsigned int sample;
	void setup()
	{
	analogReference(INTERNAL1V1);
	lcd.init();
	lcd.begin(16, 2);
	lcd.backlight(); // Print a message to the LCD.
	lcd.clear();
	lcd.setCursor(0, 0);
	lcd.print("Temp & Humidity");
	lcd.setCursor(0, 1);
	lcd.print("RAYEVER.COM");
	delay(2000);
	}
	void loop()
	{
	float h = dht.readHumidity(); // reading Humidity
	float t = dht.readTemperature(); // read Temperature as Celsius (the default)
	lcd.clear();
	lcd.setCursor(0, 0);
	// check if any reads failed and exit early (to try again).
	if (isnan(h) || isnan(t))
	{
	lcd.print("DHT sensor error!");
	return;
	}
	lcd.print("T ");
	lcd.setCursor(2, 0);
	lcd.print(t);
	float v = (float)analogRead(A2);
	lcd.setCursor(10, 0);
	//lcd.print(v);
	//lcd.print(2.56 * v / 1023.0);
	lcd.print("V ");
	lcd.setCursor(12, 0);
	lcd.print(1.1 * v / 1023.0 * 11.0);
	lcd.setCursor(0, 1);
	lcd.print("H ");
	lcd.setCursor(2, 1);
	lcd.print(h);
	delay(1000);
	}
	long readVcc()
	{
	long result;
	// Read 1.1V reference against AVcc
	ADMUX = _BV(REFS1);// | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
	delay(2); // Wait for Vref to settle
	ADCSRA |= _BV(ADSC); // Convert
	while (bit_is_set(ADCSRA, ADSC));
	result = ADCL;
	result |= ADCH << 8;
	return result;
	}

view raw HumidityLCD_85.ino hosted with ❤ by GitHub