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139 lines
4.1 KiB
139 lines
4.1 KiB
// -----------------------------------------------------------------------------
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// Energy monitor sensor
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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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#if I2C_USE_BRZO
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#include <brzo_i2c.h>
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#else
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#include <Wire.h>
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#endif
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// ADC121 Registers
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#define ADC121_REG_RESULT 0x00
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#define ADC121_REG_ALERT 0x01
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#define ADC121_REG_CONFIG 0x02
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#define ADC121_REG_LIMITL 0x03
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#define ADC121_REG_LIMITH 0x04
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#define ADC121_REG_HYST 0x05
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#define ADC121_REG_CONVL 0x06
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#define ADC121_REG_CONVH 0x07
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class EmonADC121Sensor : public EmonSensor {
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public:
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EmonADC121Sensor(unsigned char address, double voltage, unsigned char bits, double ref, double ratio): EmonSensor(voltage, bits, ref, ratio) {
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// Cache
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_address = address;
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_count = 4;
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// Init sensor
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#if I2C_USE_BRZO
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uint8_t buffer[2];
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buffer[0] = ADC121_REG_CONFIG;
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buffer[1] = 0x00;
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brzo_i2c_start_transaction(_address, I2C_SCL_FREQUENCY);
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brzo_i2c_write(buffer, 2, false);
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brzo_i2c_end_transaction();
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#else
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Wire.beginTransmission(_address);
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Wire.write(ADC121_REG_CONFIG);
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Wire.write(0x00);
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Wire.endTransmission();
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#endif
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// warmup
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read(_address);
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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[30];
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snprintf(buffer, sizeof(buffer), "EMON @ ADC121 @ I2C (0x%02X)", _address);
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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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if (index == 0) return MAGNITUDE_CURRENT;
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if (index == 1) return MAGNITUDE_POWER_APPARENT;
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if (index == 2) return MAGNITUDE_ENERGY;
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if (index == 3) return MAGNITUDE_ENERGY_DELTA;
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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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// 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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// Cache the value
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static unsigned long last = 0;
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static double current = 0;
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static unsigned long energy_delta = 0;
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if ((last == 0) || (millis() - last > 1000)) {
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current = read(_address);
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energy_delta = current * _voltage * (millis() - last) / 1000;
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_energy += energy_delta;
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last = millis();
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}
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if (index == 0) return current;
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if (index == 1) return current * _voltage;
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if (index == 2) return _energy;
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if (index == 3) return energy_delta;
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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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unsigned int value;
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#if I2C_USE_BRZO
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uint8_t buffer[2];
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buffer[0] = ADC121_REG_RESULT;
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brzo_i2c_start_transaction(channel, I2C_SCL_FREQUENCY);
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brzo_i2c_write(buffer, 1, false);
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brzo_i2c_read(buffer, 2, false);
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brzo_i2c_end_transaction();
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value = (buffer[0] & 0x0F) << 8;
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value |= buffer[1];
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#else
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Wire.beginTransmission(channel);
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Wire.write(ADC121_REG_RESULT);
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Wire.endTransmission();
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Wire.requestFrom(channel, (unsigned char) 2);
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value = (Wire.read() & 0x0F) << 8;
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value = value + Wire.read();
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#endif
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return value;
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}
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unsigned char _address;
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unsigned long _energy = 0;
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};
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