X-Git-Url: https://git.toastfreeware.priv.at/toast/airingbutler.git/blobdiff_plain/ee2821ca637d9d5a79a37249275f54cf5b567d53..f0647e8832273802c122d2484528a70bf3414090:/airingbutler.ino?ds=sidebyside

diff --git a/airingbutler.ino b/airingbutler.ino
index 075db34..a330864 100644
--- a/airingbutler.ino
+++ b/airingbutler.ino
@@ -14,10 +14,14 @@ const int buzzer_pin = 13;
 const int co2_warning_thr = 1000;
 const int co2_alarm_thr   = 1500;
 
+const unsigned long warmuptime   = 60000; // 1 min.
+const unsigned long cooldowntime = 60000; // 1 min.
+
 MHZ19 mhz19 = MHZ19(rx_pin,tx_pin);
 LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
 
 unsigned long time;
+unsigned long lastwarntime = 0;
 int co2 = 0;
 int temp = 0;
 int lastppm = 0;
@@ -81,27 +85,40 @@ void loop()
 	Serial.print(",");
 	Serial.println(temp);
 
+	// LEDs
 	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) {
-		buzz(100, 3);
+	// LCD
+	if (time < warmuptime && (co2 == -1 || co2 == 410)) {
+		lcd.begin(16, 2);
+		lcd.setCursor(0, 0);
+		lcd.print("Airing Butler");
+		lcd.setCursor(0, 1);
+		lcd.print("is warming up...");
+	} else {
+		lcd.begin(16 ,2);
+		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 +/-  ");
 	}
 
-	if (co2 >= co2_warning_thr && lastppm < co2_warning_thr) {
+	// buzzer
+	if (co2 >= co2_alarm_thr && lastppm < co2_alarm_thr && time - lastwarntime > cooldowntime) {
+		buzz(100, 3);
+		lastwarntime = time;
+	}
+	if (co2 >= co2_warning_thr && lastppm < co2_warning_thr && time - lastwarntime > cooldowntime) {
 		buzz(500, 1);
+		lastwarntime = time;
 	}
 
-	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);
 }