Fork of the espurna firmware for `mhsw` switches
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/*
EMON MODULE
Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
*/
#if ENABLE_EMON
#include <EmonLiteESP.h>
#include <EEPROM.h>
#if EMON_PROVIDER == EMON_ADC121_PROVIDER
#include "brzo_i2c.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
EmonLiteESP emon;
bool _emonReady = false;
double _emonCurrent = 0;
unsigned int _emonPower = 0;
unsigned int _emonVoltage = 0;
// -----------------------------------------------------------------------------
// Provider
// -----------------------------------------------------------------------------
unsigned int currentCallback() {
#if EMON_PROVIDER == EMON_ANALOG_PROVIDER
return analogRead(EMON_CURRENT_PIN);
#endif
#if EMON_PROVIDER == EMON_ADC121_PROVIDER
uint8_t buffer[2];
brzo_i2c_start_transaction(EMON_ADC121_ADDRESS, I2C_SCL_FREQUENCY);
buffer[0] = ADC121_REG_RESULT;
brzo_i2c_write(buffer, 1, false);
brzo_i2c_read(buffer, 2, false);
brzo_i2c_end_transaction();
unsigned int value;
value = (buffer[0] & 0x0F) << 8;
value |= buffer[1];
return value;
#endif
}
// -----------------------------------------------------------------------------
// HAL
// -----------------------------------------------------------------------------
void setCurrentRatio(float value) {
emon.setCurrentRatio(value);
}
unsigned int getApparentPower() {
return int(getCurrent() * getVoltage());
}
double getCurrent() {
double current = emon.getCurrent(EMON_SAMPLES);
current -= EMON_CURRENT_OFFSET;
if (current < 0) current = 0;
return current;
}
unsigned int getVoltage() {
return getSetting("emonVoltage", EMON_MAINS_VOLTAGE).toInt();
}
// -----------------------------------------------------------------------------
void powerMonitorSetup() {
// backwards compatibility
String tmp;
tmp = getSetting("pwMainsVoltage", EMON_MAINS_VOLTAGE);
setSetting("emonVoltage", tmp);
delSetting("pwMainsVoltage");
tmp = getSetting("emonMains", EMON_MAINS_VOLTAGE);
setSetting("emonVoltage", tmp);
delSetting("emonMains");
tmp = getSetting("pwCurrentRatio", EMON_CURRENT_RATIO);
setSetting("emonRatio", tmp);
delSetting("pwCurrentRatio");
emon.initCurrent(
currentCallback,
EMON_ADC_BITS,
EMON_REFERENCE_VOLTAGE,
getSetting("emonRatio", EMON_CURRENT_RATIO).toFloat()
);
emon.setPrecision(EMON_CURRENT_PRECISION);
#if EMON_PROVIDER == EMON_ADC121_PROVIDER
uint8_t buffer[2];
buffer[0] = ADC121_REG_CONFIG;
buffer[1] = 0x00;
brzo_i2c_start_transaction(EMON_ADC121_ADDRESS, I2C_SCL_FREQUENCY);
brzo_i2c_write(buffer, 2, false);
brzo_i2c_end_transaction();
#endif
apiRegister(EMON_APOWER_TOPIC, EMON_APOWER_TOPIC, [](char * buffer, size_t len) {
if (_emonReady) {
snprintf(buffer, len, "%d", _emonPower);
} else {
buffer = NULL;
}
});
apiRegister(EMON_CURRENT_TOPIC, EMON_CURRENT_TOPIC, [](char * buffer, size_t len) {
if (_emonReady) {
dtostrf(_emonCurrent, len-1, 3, buffer);
} else {
buffer = NULL;
}
});
}
void powerMonitorLoop() {
static unsigned long next_measurement = millis();
static bool warmup = true;
static byte measurements = 0;
static double max = 0;
static double min = 0;
static double sum = 0;
if (warmup) {
warmup = false;
emon.warmup();
}
if (millis() > next_measurement) {
int voltage = getVoltage();
{
double current = getCurrent();
if (measurements == 0) {
max = min = current;
} else {
if (_emonCurrent > max) max = current;
if (_emonCurrent < min) min = current;
}
sum += current;
++measurements;
DEBUG_MSG_P(PSTR("[ENERGY] Current: %sA\n"), String(current, 3).c_str());
DEBUG_MSG_P(PSTR("[ENERGY] Power: %dW\n"), int(current * voltage));
// Update websocket clients
if (wsConnected()) {
char text[100];
sprintf_P(text, PSTR("{\"emonVisible\": 1, \"emonApparentPower\": %d, \"emonCurrent\": %s}"), int(current * voltage), String(current, 3).c_str());
wsSend(text);
}
}
// Send MQTT messages averaged every EMON_MEASUREMENTS
if (measurements == EMON_MEASUREMENTS) {
// Calculate average current (removing max and min values)
_emonCurrent = (sum - max - min) / (measurements - 2);
_emonPower = (int) (_emonCurrent * voltage);
_emonReady = true;
// Calculate energy increment (ppower times time)
double energy_delta = (double) _emonPower * EMON_INTERVAL * EMON_MEASUREMENTS / 1000.0 / 3600.0;
// Report values to MQTT broker
mqttSend(getSetting("emonPowerTopic", EMON_APOWER_TOPIC).c_str(), String(_emonPower).c_str());
mqttSend(getSetting("emonCurrTopic", EMON_CURRENT_TOPIC).c_str(), String(_emonCurrent, 3).c_str());
mqttSend(getSetting("emonEnergyTopic", EMON_ENERGY_TOPIC).c_str(), String(energy_delta, 3).c_str());
// Report values to Domoticz
#if ENABLE_DOMOTICZ
{
char buffer[20];
snprintf(buffer, 20, "%d;%s", _emonPower, String(energy_delta, 3).c_str());
domoticzSend("dczPowIdx", 0, buffer);
snprintf(buffer, 20, "%s", String(energy_delta, 3).c_str());
domoticzSend("dczEnergyIdx", 0, buffer);
snprintf(buffer, 20, "%s", String(_emonCurrent, 3).c_str());
domoticzSend("dczCurrentIdx", 0, buffer);
}
#endif
#if ENABLE_INFLUXDB
influxDBSend(getSetting("emonPowerTopic", EMON_APOWER_TOPIC).c_str(), _emonPower);
influxDBSend(getSetting("emonCurrTopic", EMON_CURRENT_TOPIC).c_str(), String(_emonCurrent, 3).c_str());
influxDBSend(getSetting("emonEnergyTopic", EMON_ENERGY_TOPIC).c_str(), String(energy_delta, 3).c_str());
#endif
// Reset counters
sum = measurements = 0;
}
next_measurement += EMON_INTERVAL;
}
}
#endif