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