1 files changed, 45 insertions, 0 deletions
diff --git a/C/HF/chap4/lab1/moisture.c b/C/HF/chap4/lab1/moisture.c
new file mode 100644
index 0000000..349050f
--- /dev/null
+++ b/C/HF/chap4/lab1/moisture.c
@@ -0,0 +1,45 @@
+/* This works - tested on Tinkercad */
+#define THRESHOLD 800
+#define DRY 500
+
+#define LED 13
+
+setup(){
+	Serial.begin(9600);
+	pinMode(LED, OUTPUT);
+	digitalWrite(LED, LOW);
+}
+
+void blink_led(long interval) {
+	digitalWrite(LED, LOW);
+	delay(interval);
+	digitalWrite(LED, HIGH);
+}
+
+void led_on(void)
+{
+	if (digitalRead(LED) == LOW)
+		digitalWrite(LED, HIGH);
+}
+
+void led_off(void)
+{
+	if (digitalRead(LED) == HIGH) {
+		digitalWrite(LED, LOW);
+		Serial.println("Thank you, Seymour");
+	}
+}
+
+void loop(){
+	int moist = analogRead(1);
+	if (moist > THRESHOLD) {
+		led_off();
+		continue;
+	}
+
+	if (moist < DRY)
+		blink_led(500);
+	else
+		led_on();
+	Serial.println("Feed me!");
+}