Login▼/회원가입BASIC4MCU | 질문게시판 | 일산화탄소 경보기 질문 있습니다
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작성자 지니 작성일2022-12-10 17:33 조회656회 댓글0건
https://www.basic4mcu.com/bbs/board.php?bo_table=gac&wr_id=22142
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MQ-7과 부저 3색 led, I2C lcd를 이용해서 하는데 lcd에 일산화탄소 농도가 너무 높게 나옵니다
#include
#include
#include
LiquidCrystal_I2C lcd (0x27, 16, 2);
#define NOTE_C7 2093
#define NOTE_D7 2349
#define NOTE_E7 2637
#define NOTE_F7 2794
#define NOTE_G7 3136
#define NOTE_A7 3520
#define NOTE_B7 3951
#define NOTE_C8 4186
int rgb_red = 8;
int rgb_green = 9;
int rgb_blue = 10;
int buzzerPin = 4;
MQ7 mq7(A0, 5.0);
void setup() {
Serial.begin(9600);
lcd.begin();
lcd.backlight();
}
void loop() {
Serial.println(mq7.getPPM());
delay(1000);
if (mq7.getPPM() <= 19) {
analogWrite(rgb_red, 0);
analogWrite(rgb_green, 0);
analogWrite(rgb_blue, 255);
Serial.println("blue");
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("MQ7_value [^__^]");
lcd.setCursor(0, 1);
lcd.print(mq7.getPPM());
lcd.print(" ppm");
} else if (20 < mq7.getPPM() && mq7.getPPM() <= 30) {
analogWrite(rgb_red, 0);
analogWrite(rgb_green, 255);
analogWrite(rgb_blue, 0);
Serial.println("green");
tone(buzzerPin, NOTE_C7, 500);
delay(100);
tone(buzzerPin, NOTE_D7, 500);
delay(100);
tone(buzzerPin, NOTE_E7, 500);
delay(100);
tone(buzzerPin, NOTE_F7, 500);
delay(100);
tone(buzzerPin, NOTE_G7, 500);
delay(100);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("MQ7_value [+__+] ");
lcd.setCursor(0, 1);
lcd.print(mq7.getPPM());
lcd.print(" ppm");
}
else {
analogWrite(rgb_red, 255);
analogWrite(rgb_green, 0);
analogWrite(rgb_blue, 0);
Serial.println("red");
tone(buzzerPin, NOTE_G7, 1000);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("MQ7_value [***] ");
lcd.setCursor(0, 1);
lcd.print(mq7.getPPM());
lcd.print(" ppm");
}
delay(1000);
}
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