Create file for the soil moisture sensor with some logic

capacitiveSoilMoistureSensor.ino

@@ -0,0 +1,43 @@
+/*
+  Code for the Capacitive Soil Moisture Sensor
+*/
+
+const int numReadings = 10;
+
+int readings[numReadings];      // the readings from the analog input
+int readIndex = 0;              // the index of the current reading
+int total = 0;                  // the running total
+int average = 0;                // the average
+
+int inputPin = 12;
+
+void setupCapacitiveSoilMoistureSensor() {
+
+  Serial.begin(9600);
+
+  for (int thisReading = 0; thisReading < numReadings; thisReading++) {
+    readings[thisReading] = 0;
+  }
+}
+
+void loopCapacitiveSoilMoistureSensor() {
+  // subtract the last reading:
+  total = total - readings[readIndex];
+  // read from the sensor:
+  readings[readIndex] = analogRead(inputPin);
+  // add the reading to the total:
+  total = total + readings[readIndex];
+  // advance to the next position in the array:
+  readIndex = readIndex + 1;
+
+  // if we're at the end of the array...
+  if (readIndex >= numReadings) {
+    // ...wrap around to the beginning:
+    readIndex = 0;
+  }
+
+  // calculate the average:
+  average = total / numReadings;
+  Serial.println(average);
+  delay(1);        // delay in between reads for stability
+}