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126 lines
3.4 KiB
126 lines
3.4 KiB
// -----------------------------------------------------------------------------
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// Energy Monitor Sensor using builtin ADC
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// Copyright (C) 2017 by Xose Pérez <xose dot perez at gmail dot com>
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// -----------------------------------------------------------------------------
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#pragma once
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#include "Arduino.h"
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#include "BaseSensor.h"
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#include "EmonSensor.h"
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#define INTERNAL_ADC_RESOLUTION 10
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class EmonAnalogSensor : public EmonSensor {
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public:
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// ---------------------------------------------------------------------
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// Public
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// ---------------------------------------------------------------------
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// ---------------------------------------------------------------------
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// Sensor API
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// ---------------------------------------------------------------------
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// Initialization method, must be idempotent
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void begin() {
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// Just one channel
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_count = _magnitudes;
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// Bit depth
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_resolution = INTERNAL_ADC_RESOLUTION;
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// Init analog PIN
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pinMode(_gpio, INPUT);
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// Call the parent class method
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EmonSensor::begin();
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// warmup channel 0 (the only one)
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_pivot = _adc_counts >> 1;
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read(_gpio, _pivot);
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}
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// Descriptive name of the sensor
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String name() {
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char buffer[20];
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snprintf(buffer, sizeof(buffer), "EMON @ GPIO%d", _gpio);
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return String(buffer);
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}
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// Descriptive name of the slot # index
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String slot(unsigned char index) {
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return name();
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}
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// Type for slot # index
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magnitude_t type(unsigned char index) {
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_error = SENSOR_ERROR_OK;
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unsigned char i=0;
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#if EMON_REPORT_CURRENT
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if (index == i++) return MAGNITUDE_CURRENT;
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#endif
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#if EMON_REPORT_POWER
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if (index == i++) return MAGNITUDE_POWER_APPARENT;
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#endif
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#if EMON_REPORT_ENERGY
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if (index == i) return MAGNITUDE_ENERGY;
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#endif
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_error = SENSOR_ERROR_OUT_OF_RANGE;
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return MAGNITUDE_NONE;
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}
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// Pre-read hook (usually to populate registers with up-to-date data)
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void pre() {
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_current = read(0, _pivot);
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#if EMON_REPORT_ENERGY
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static unsigned long last = 0;
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if (last > 0) {
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_energy += (_current * _voltage * (millis() - last) / 1000);
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}
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last = millis();
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#endif
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}
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// Current value for slot # index
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double value(unsigned char index) {
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_error = SENSOR_ERROR_OK;
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unsigned char i=0;
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#if EMON_REPORT_CURRENT
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if (index == i++) return _current;
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#endif
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#if EMON_REPORT_POWER
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if (index == i++) return _current * _voltage;
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#endif
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#if EMON_REPORT_ENERGY
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if (index == i) return _energy;
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#endif
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_error = SENSOR_ERROR_OUT_OF_RANGE;
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return 0;
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}
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protected:
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unsigned int readADC(unsigned char channel) {
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return analogRead(_gpio);
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}
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unsigned char _gpio = 0;
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double _pivot = 0;
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double _current;
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#if EMON_REPORT_ENERGY
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unsigned long _energy = 0;
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#endif
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};
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