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176 lines
4.4 KiB
176 lines
4.4 KiB
/*
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EMON MODULE
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Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#if ENABLE_EMON
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#include <EmonLiteESP.h>
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#include "brzo_i2c.h"
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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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EmonLiteESP emon;
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double _current = 0;
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unsigned int _power = 0;
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// -----------------------------------------------------------------------------
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// Provider
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// -----------------------------------------------------------------------------
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unsigned int currentCallback() {
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#if EMON_PROVIDER == EMON_ANALOG_PROVIDER
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return analogRead(EMON_CURRENT_PIN);
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#endif
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#if EMON_PROVIDER == EMON_ADC121_PROVIDER
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uint8_t buffer[2];
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brzo_i2c_start_transaction(EMON_ADC121_ADDRESS, I2C_SCL_FREQUENCY);
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buffer[0] = ADC121_REG_RESULT;
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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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unsigned int value;
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value = (buffer[0] & 0x0F) << 8;
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value |= buffer[1];
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return value;
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#endif
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}
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// -----------------------------------------------------------------------------
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// EMON
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// -----------------------------------------------------------------------------
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void setCurrentRatio(float value) {
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emon.setCurrentRatio(value);
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}
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unsigned int getPower() {
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return _power;
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}
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double getCurrent() {
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return _current;
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}
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void powerMonitorSetup() {
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// backwards compatibility
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String tmp;
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tmp = getSetting("pwMainsVoltage", EMON_MAINS_VOLTAGE);
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setSetting("emonMains", tmp);
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delSetting("pwMainsVoltage");
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tmp = getSetting("pwCurrentRatio", EMON_CURRENT_RATIO);
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setSetting("emonRatio", tmp);
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delSetting("pwCurrentRatio");
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emon.initCurrent(
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currentCallback,
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EMON_ADC_BITS,
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EMON_REFERENCE_VOLTAGE,
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getSetting("emonRatio", EMON_CURRENT_RATIO).toFloat()
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);
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emon.setPrecision(EMON_CURRENT_PRECISION);
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#if EMON_PROVIDER == EMON_ADC121_PROVIDER
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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(EMON_ADC121_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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#endif
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apiRegister("/api/power", "power", [](char * buffer, size_t len) {
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snprintf(buffer, len, "%d", _power);
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});
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}
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void powerMonitorLoop() {
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static unsigned long next_measurement = millis();
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static bool warmup = true;
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static byte measurements = 0;
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static double max = 0;
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static double min = 0;
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static double sum = 0;
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if (!mqttConnected()) return;
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if (warmup) {
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warmup = false;
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emon.warmup();
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}
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if (millis() > next_measurement) {
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// Safety check: do not read current if relay is OFF
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if (!relayStatus(0)) {
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_current = 0;
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} else {
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_current = emon.getCurrent(EMON_SAMPLES);
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_current -= EMON_CURRENT_OFFSET;
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if (_current < 0) _current = 0;
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}
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if (measurements == 0) {
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max = min = _current;
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} else {
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if (_current > max) max = _current;
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if (_current < min) min = _current;
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}
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sum += _current;
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++measurements;
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float mainsVoltage = getSetting("emonMains", EMON_MAINS_VOLTAGE).toFloat();
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char current[6];
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dtostrf(_current, 5, 2, current);
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DEBUG_MSG("[ENERGY] Current: %sA\n", current);
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DEBUG_MSG("[ENERGY] Power: %dW\n", int(_current * mainsVoltage));
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// Update websocket clients
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char text[20];
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sprintf_P(text, PSTR("{\"emonPower\": %d}"), int(_current * mainsVoltage));
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wsSend(text);
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// Send MQTT messages averaged every EMON_MEASUREMENTS
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if (measurements == EMON_MEASUREMENTS) {
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_power = (int) ((sum - max - min) * mainsVoltage / (measurements - 2));
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sum = 0;
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measurements = 0;
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char power[6];
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snprintf(power, 6, "%d", _power);
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mqttSend(getSetting("emonPowerTopic", EMON_POWER_TOPIC).c_str(), power);
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#if ENABLE_DOMOTICZ
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domoticzSend("dczPowIdx", power);
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#endif
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}
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next_measurement += EMON_INTERVAL;
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}
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}
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#endif
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