Directory restructure

src/main.c

@@ -0,0 +1,39 @@
+#include <avr/sleep.h>
+
+#define MOISTURE_SENSOR_A0 A0
+
+volatile bool readSensors = false;
+
+ISR(WDT_vect) {
+    readSensors = true;
+}
+
+void watchdog() {
+    cli();
+    // Set watchdog timer to 8 seconds
+    WDTCSR = (1 << WDCE) | (1 << WDE);
+    WDTCSR = (1 << WDIE) | (1 << WDP3);
+    sei();
+}
+
+void sleep_mode() {
+    set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+    sleep_enable();
+    sleep_cpu();
+    sleep_disable();
+}
+
+void setup() {
+    pinMode(MOISTURE_SENSOR_A0, INPUT);
+    Serial.begin(9600);
+}
+
+void loop() {
+    if (readSensors) {
+        uint16_t moisture = analogRead(MOISTURE_SENSOR_A0);
+        Serial.println(moisture);
+
+        readSensors = false;
+    }
+    sleep_mode();
+}