125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
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// -----------------------------------------------------------------------------
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// Energy Monitor Sensor using builtin ADC
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// Copyright (C) 2017-2018 by Xose Pérez <xose dot perez at gmail dot com>
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// -----------------------------------------------------------------------------
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#if SENSOR_SUPPORT && EMON_ANALOG_SUPPORT
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#pragma once
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#include "Arduino.h"
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#include "EmonSensor.h"
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#define EMON_ANALOG_RESOLUTION 10
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#define EMON_ANALOG_CHANNELS 1
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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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EmonAnalogSensor(): EmonSensor() {
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_channels = EMON_ANALOG_CHANNELS;
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_sensor_id = SENSOR_EMON_ANALOG_ID;
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init();
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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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if (!_dirty) return;
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_dirty = false;
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// Number of slots
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_count = _magnitudes;
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// Bit depth
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_resolution = EMON_ANALOG_RESOLUTION;
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// Init analog PIN)
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pinMode(0, 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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read(0);
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}
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// Descriptive name of the sensor
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String description() {
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return String("EMON @ ANALOG @ GPIO0");
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}
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// Address of the sensor (it could be the GPIO or I2C address)
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String address(unsigned char index) {
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return String("0");
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}
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// Type for slot # index
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unsigned char type(unsigned char index) {
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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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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[0] = read(0);
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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[0] += (_current[0] * _voltage * (millis() - last) / 1000);
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}
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last = millis();
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#endif
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_error = SENSOR_ERROR_OK;
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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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unsigned char channel = index / _magnitudes;
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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[channel];
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#endif
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#if EMON_REPORT_POWER
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if (index == i++) return _current[channel] * _voltage;
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#endif
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#if EMON_REPORT_ENERGY
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if (index == i) return _energy[channel];
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#endif
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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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(void) channel;
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return analogRead(0);
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}
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};
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#endif // SENSOR_SUPPORT && EMON_ANALOG_SUPPORT
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