Restructure directory organization

src/atmega/moisture.cpp

@@ -0,0 +1,40 @@
+#include <Arduino.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "moisture.h"
+#include "config.h"
+
+static int16_t moistureReadingSum = 0;
+static int8_t moistureReadingCount = 0;
+
+volatile bool readSensors = false;
+
+void initMoistureSensor(void) {
+    pinMode(MOISTURE_SENSOR_A0, INPUT);
+}
+
+void triggerSensorRead(void) {
+    readSensors = true;
+}
+
+int16_t readMoisture(void) {
+    if (!readSensors)
+        return -1;
+
+    moistureReadingSum += analogRead(MOISTURE_SENSOR_A0);
+    moistureReadingCount++;
+
+    //TODO: implement variance check (if over a certain variance discard measurements for this cicle)
+    if (moistureReadingCount >= SENSOR_READINGS) {
+        int16_t avg = moistureReadingSum / SENSOR_READINGS;
+        //Serial.println(avg);
+        moistureReadingSum = 0;
+        moistureReadingCount = 0;
+        readSensors = false;
+        return avg;
+    } else readSensors = true;
+
+    return -1;
+}