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