Fork of the espurna firmware for `mhsw` switches
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// -----------------------------------------------------------------------------
// Energy monitor sensor
// -----------------------------------------------------------------------------
#pragma once
#include "Arduino.h"
#include "BaseSensor.h"
#include "EmonSensor.h"
#if I2C_USE_BRZO
#include <brzo_i2c.h>
#else
#include <Wire.h>
#endif
// ADC121 Registers
#define ADC121_REG_RESULT 0x00
#define ADC121_REG_ALERT 0x01
#define ADC121_REG_CONFIG 0x02
#define ADC121_REG_LIMITL 0x03
#define ADC121_REG_LIMITH 0x04
#define ADC121_REG_HYST 0x05
#define ADC121_REG_CONVL 0x06
#define ADC121_REG_CONVH 0x07
class EmonADC121Sensor : public EmonSensor {
public:
EmonADC121Sensor(unsigned char address, double voltage, unsigned char bits, double ref, double ratio): EmonSensor(voltage, bits, ref, ratio) {
// Cache
_address = address;
_count = _magnitudes;
// Init sensor
#if I2C_USE_BRZO
uint8_t buffer[2];
buffer[0] = ADC121_REG_CONFIG;
buffer[1] = 0x00;
brzo_i2c_start_transaction(_address, I2C_SCL_FREQUENCY);
brzo_i2c_write(buffer, 2, false);
brzo_i2c_end_transaction();
#else
Wire.beginTransmission(_address);
Wire.write(ADC121_REG_CONFIG);
Wire.write(0x00);
Wire.endTransmission();
#endif
// warmup
read(_address, _pivot);
}
// Descriptive name of the sensor
String name() {
char buffer[30];
snprintf(buffer, sizeof(buffer), "EMON @ ADC121 @ I2C (0x%02X)", _address);
return String(buffer);
}
// Descriptive name of the slot # index
String slot(unsigned char index) {
return name();
}
// Type for slot # index
magnitude_t type(unsigned char index) {
_error = SENSOR_ERROR_OK;
unsigned char i = 0;
#if EMON_REPORT_CURRENT
if (index == i++) return MAGNITUDE_CURRENT;
#endif
#if EMON_REPORT_POWER
if (index == i++) return MAGNITUDE_POWER_APPARENT;
#endif
#if EMON_REPORT_ENERGY
if (index == i) return MAGNITUDE_ENERGY;
#endif
_error = SENSOR_ERROR_OUT_OF_RANGE;
return MAGNITUDE_NONE;
}
// Current value for slot # index
double value(unsigned char index) {
_error = SENSOR_ERROR_OK;
// Cache the value
static unsigned long last = 0;
if ((last == 0) || (millis() - last > 1000)) {
_current = read(0, _pivot);
#if EMON_REPORT_ENERGY
_energy += (_current * _voltage * (millis() - last) / 1000);
#endif
last = millis();
}
// Report
unsigned char i = 0;
#if EMON_REPORT_CURRENT
if (index == i++) return _current;
#endif
#if EMON_REPORT_POWER
if (index == i++) return _current * _voltage;
#endif
#if EMON_REPORT_ENERGY
if (index == i) return _energy;
#endif
_error = SENSOR_ERROR_OUT_OF_RANGE;
return 0;
}
protected:
unsigned int readADC(unsigned char channel) {
unsigned int value;
#if I2C_USE_BRZO
uint8_t buffer[2];
buffer[0] = ADC121_REG_RESULT;
brzo_i2c_start_transaction(_address, I2C_SCL_FREQUENCY);
brzo_i2c_write(buffer, 1, false);
brzo_i2c_read(buffer, 2, false);
brzo_i2c_end_transaction();
value = (buffer[0] & 0x0F) << 8;
value |= buffer[1];
#else
Wire.beginTransmission(_address);
Wire.write(ADC121_REG_RESULT);
Wire.endTransmission();
Wire.requestFrom(_address, (unsigned char) 2);
value = (Wire.read() & 0x0F) << 8;
value = value + Wire.read();
#endif
return value;
}
unsigned char _address;
double _pivot = 0;
double _current = 0;
#if EMON_REPORT_ENERGY
unsigned long _energy = 0;
#endif
};