more whitespace changes

[toast/airingbutler.git] / airingbutler.ino

diff --git a/airingbutler.ino b/airingbutler.ino
index 94ba188bf829b92983ee89351c98132f5ffe1ff0..ef2d87421d45800ffb29734f96feb494b40add13 100644 (file)
--- a/airingbutler.ino
+++ b/airingbutler.ino
@@ -1,33 +1,111 @@
 #include <SoftwareSerial.h>
+#include <LiquidCrystal.h>
 #include "MHZ19.h"
 
 const int rx_pin = 2; // connect to TX on MHZ19
 const int tx_pin = 3; // connect to RX on MHZ19
 
+const int led_green_pin  = 4;
+const int led_yellow_pin = 5;
+const int led_red_pin    = 6;
+
+const int buzzer_pin = 13;
+
+const int co2_warning_thr = 1000;
+const int co2_alarm_thr   = 1500;
 
 MHZ19 mhz19 = MHZ19(rx_pin,tx_pin);
+LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
+
 unsigned long time;
+int co2 = 0;
+int temp = 0;
+int lastppm = 0;
 
 
 void setup()
 {
-    Serial.begin(115200);
-    Serial.println("Time,CO2,Temp");
-    mhz19.begin(rx_pin, tx_pin);
+       Serial.begin(115200);
+       Serial.println("Time,CO2,Temp");
+
+       // MH-Z19
+       mhz19.begin(rx_pin, tx_pin);
+
+       // LCD
+       lcd.begin(16, 2);
+       lcd.setCursor(0, 0);
+       lcd.print("Airing Butler");
+       lcd.setCursor(0, 1);
+       lcd.print("says hello!");
+
+       // LEDs + buzzer
+       pinMode(led_green_pin, OUTPUT);
+       pinMode(led_yellow_pin, OUTPUT);
+       pinMode(led_red_pin, OUTPUT);
+       pinMode(buzzer_pin, OUTPUT);
+       digitalWrite(led_green_pin, HIGH);
+       delay(500);
+       digitalWrite(led_green_pin, LOW);
+       digitalWrite(led_yellow_pin, HIGH);
+       delay(500);
+       digitalWrite(led_yellow_pin, LOW);
+       digitalWrite(led_red_pin, HIGH);
+       delay(500);
+       digitalWrite(led_red_pin, LOW);
+       digitalWrite(buzzer_pin, HIGH);
+       delay(200);
+       digitalWrite(buzzer_pin, LOW);
+
+       lcd.clear();
 }
 
 
 void loop()
 {
-    time = millis();
-    measurement_t m = mhz19.getMeasurement();
-
-    Serial.print(time);
-    Serial.print(",");
-    Serial.print(m.co2_ppm);
-    Serial.print(",");
-    Serial.println(m.temperature);
-    
-    delay(5000);
-}
+       time = millis();
+       measurement_t m = mhz19.getMeasurement();
+       co2 = m.co2_ppm;
+       temp = m.temperature;
+
+       Serial.print(time);
+       Serial.print(",");
+       Serial.print(co2);
+       Serial.print(",");
+       Serial.println(temp);
+
+       digitalWrite(led_red_pin, co2 >= co2_alarm_thr);
+       digitalWrite(led_yellow_pin, co2 >= co2_warning_thr && co2 < co2_alarm_thr);
+       digitalWrite(led_green_pin, co2 < co2_warning_thr);
+
+       if (co2 >= co2_alarm_thr && lastppm < co2_alarm_thr) {
+               digitalWrite(buzzer_pin, HIGH);
+               delay(100);
+               digitalWrite(buzzer_pin, LOW);
+               delay(100);
+               digitalWrite(buzzer_pin, HIGH);
+               delay(100);
+               digitalWrite(buzzer_pin, LOW);
+               delay(100);
+               digitalWrite(buzzer_pin, HIGH);
+               delay(100);
+               digitalWrite(buzzer_pin, LOW);
+       }
 
+       if (co2 >= co2_warning_thr && lastppm < co2_warning_thr) {
+               digitalWrite(buzzer_pin, HIGH);
+               delay(500);
+               digitalWrite(buzzer_pin, LOW);
+       }
+
+       lcd.setCursor(0, 0);
+       lcd.print("CO2: ");
+       lcd.print(co2);
+       lcd.print(" ppm    ");
+       lcd.setCursor(0, 1);
+       lcd.print("Temp: ");
+       lcd.print(temp);
+       lcd.print(" C +/-  ");
+
+       lastppm = co2;
+       delay(5000);
+}