Fork of the espurna firmware for `mhsw` switches
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// -----------------------------------------------------------------------------
// ADS121-based Energy Monitor Sensor over I2C
// Copyright (C) 2017-2019 by Xose Pérez <xose dot perez at gmail dot com>
// -----------------------------------------------------------------------------
#if SENSOR_SUPPORT && EMON_ADC121_SUPPORT
#pragma once
#include "Arduino.h"
#include "EmonSensor.h"
// 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
#define ADC121_RESOLUTION 12
#define ADC121_CHANNELS 1
class EmonADC121Sensor : public EmonSensor {
public:
// ---------------------------------------------------------------------
// Public
// ---------------------------------------------------------------------
EmonADC121Sensor(): EmonSensor() {
_channels = ADC121_CHANNELS;
_sensor_id = SENSOR_EMON_ADC121_ID;
init();
}
// ---------------------------------------------------------------------
// Sensor API
// ---------------------------------------------------------------------
// Initialization method, must be idempotent
void begin() {
if (!_dirty) return;
_dirty = false;
// Discover
unsigned char addresses[] = {0x50, 0x51, 0x52, 0x54, 0x55, 0x56, 0x58, 0x59, 0x5A};
_address = _begin_i2c(_address, sizeof(addresses), addresses);
if (_address == 0) return;
// Init sensor
_init();
// Just one channel
_count = _magnitudes;
// Bit depth
_resolution = ADC121_RESOLUTION;
// Call the parent class method
EmonSensor::begin();
// warmup channel 0 (the only one)
read(0);
}
// Descriptive name of the sensor
String description() {
char buffer[30];
snprintf(buffer, sizeof(buffer), "EMON @ ADC121 @ I2C (0x%02X)", _address);
return String(buffer);
}
// Pre-read hook (usually to populate registers with up-to-date data)
void pre() {
if (_address == 0) {
_error = SENSOR_ERROR_UNKNOWN_ID;
return;
}
_current[0] = read(0);
#if EMON_REPORT_ENERGY
static unsigned long last = 0;
if (last > 0) {
_energy[0] += (_current[0] * _voltage * (millis() - last) / 1000);
}
last = millis();
#endif
_error = SENSOR_ERROR_OK;
}
// Type for slot # index
unsigned char type(unsigned char index) {
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
return MAGNITUDE_NONE;
}
// Current value for slot # index
double value(unsigned char index) {
unsigned char channel = index / _magnitudes;
unsigned char i=0;
#if EMON_REPORT_CURRENT
if (index == i++) return _current[channel];
#endif
#if EMON_REPORT_POWER
if (index == i++) return _current[channel] * _voltage;
#endif
#if EMON_REPORT_ENERGY
if (index == i) return _energy[channel];
#endif
return 0;
}
protected:
// ---------------------------------------------------------------------
// Protected
// ---------------------------------------------------------------------
void _init() {
i2c_write_uint8(_address, ADC121_REG_CONFIG, 0);
}
unsigned int readADC(unsigned char channel) {
UNUSED(channel);
unsigned int value = i2c_read_uint16(_address, ADC121_REG_RESULT) & 0x0FFF;
return value;
}
};
#endif // SENSOR_SUPPORT && EMON_ADC121_SUPPORT