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281 lines
8.8 KiB
281 lines
8.8 KiB
/*
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POW MODULE
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Support for Sonoff POW HLW8012-based power monitor
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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_POW
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#include <HLW8012.h>
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#include <Hash.h>
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#include <ArduinoJson.h>
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#include <EEPROM.h>
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HLW8012 hlw8012;
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bool _powEnabled = false;
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double _energy = 0;
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// -----------------------------------------------------------------------------
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// POW
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// -----------------------------------------------------------------------------
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// When using interrupts we have to call the library entry point
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// whenever an interrupt is triggered
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void hlw8012_cf1_interrupt() {
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hlw8012.cf1_interrupt();
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}
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void hlw8012_cf_interrupt() {
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hlw8012.cf_interrupt();
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}
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void powEnable(bool status) {
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_powEnabled = status;
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if (_powEnabled) {
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#if POW_USE_INTERRUPTS == 1
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attachInterrupt(POW_CF1_PIN, hlw8012_cf1_interrupt, CHANGE);
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attachInterrupt(POW_CF_PIN, hlw8012_cf_interrupt, CHANGE);
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#endif
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DEBUG_MSG("[POW] Enabled\n");
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} else {
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#if POW_USE_INTERRUPTS == 1
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detachInterrupt(POW_CF1_PIN);
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detachInterrupt(POW_CF_PIN);
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#endif
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DEBUG_MSG("[POW] Disabled\n");
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}
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}
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// -----------------------------------------------------------------------------
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void powSaveCalibration() {
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setSetting("powPowerMult", hlw8012.getPowerMultiplier());
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setSetting("powCurrentMult", hlw8012.getCurrentMultiplier());
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setSetting("powVoltageMult", hlw8012.getVoltageMultiplier());
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}
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void powRetrieveCalibration() {
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double value;
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value = getSetting("powPowerMult", 0).toFloat();
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if (value > 0) hlw8012.setPowerMultiplier((int) value);
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value = getSetting("powCurrentMult", 0).toFloat();
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if (value > 0) hlw8012.setCurrentMultiplier((int) value);
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value = getSetting("powVoltageMult", 0).toFloat();
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if (value > 0) hlw8012.setVoltageMultiplier((int) value);
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}
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void powSetExpectedActivePower(unsigned int power) {
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if (power > 0) {
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hlw8012.expectedActivePower(power);
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powSaveCalibration();
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}
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}
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void powSetExpectedCurrent(double current) {
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if (current > 0) {
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hlw8012.expectedCurrent(current);
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powSaveCalibration();
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}
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}
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void powSetExpectedVoltage(unsigned int voltage) {
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if (voltage > 0) {
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hlw8012.expectedVoltage(voltage);
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powSaveCalibration();
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}
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}
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void powReset() {
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hlw8012.resetMultipliers();
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powSaveCalibration();
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}
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// -----------------------------------------------------------------------------
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unsigned int getActivePower() {
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return hlw8012.getActivePower();
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}
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unsigned int getApparentPower() {
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return hlw8012.getApparentPower();
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}
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unsigned int getReactivePower() {
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return hlw8012.getReactivePower();
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}
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double getCurrent() {
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return hlw8012.getCurrent();
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}
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unsigned int getVoltage() {
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return hlw8012.getVoltage();
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}
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unsigned int getPowerFactor() {
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return (int) (100 * hlw8012.getPowerFactor());
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}
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double getEnergy() {
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return _energy;
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}
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// -----------------------------------------------------------------------------
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void retrieveEnergy() {
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unsigned long energy = EEPROM.read(EEPROM_POWER_COUNT + 1);
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energy = (energy << 8) + EEPROM.read(EEPROM_POWER_COUNT);
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if (energy == 0xFFFF) energy = 0;
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_energy = energy;
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}
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void saveEnergy() {
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unsigned int energy = (int) _energy;
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EEPROM.write(EEPROM_POWER_COUNT, energy & 0xFF);
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EEPROM.write(EEPROM_POWER_COUNT + 1, (energy >> 8) & 0xFF);
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EEPROM.commit();
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}
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void powSetup() {
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// Initialize HLW8012
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// void begin(unsigned char cf_pin, unsigned char cf1_pin, unsigned char sel_pin, unsigned char currentWhen = HIGH, bool use_interrupts = false, unsigned long pulse_timeout = PULSE_TIMEOUT);
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// * cf_pin, cf1_pin and sel_pin are GPIOs to the HLW8012 IC
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// * currentWhen is the value in sel_pin to select current sampling
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// * set use_interrupts to true to use interrupts to monitor pulse widths
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// * leave pulse_timeout to the default value, recommended when using interrupts
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#if POW_USE_INTERRUPTS
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hlw8012.begin(POW_CF_PIN, POW_CF1_PIN, POW_SEL_PIN, POW_SEL_CURRENT, true);
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#else
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hlw8012.begin(POW_CF_PIN, POW_CF1_PIN, POW_SEL_PIN, POW_SEL_CURRENT, false, 1000000);
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#endif
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// These values are used to calculate current, voltage and power factors as per datasheet formula
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// These are the nominal values for the Sonoff POW resistors:
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// * The CURRENT_RESISTOR is the 1milliOhm copper-manganese resistor in series with the main line
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// * The VOLTAGE_RESISTOR_UPSTREAM are the 5 470kOhm resistors in the voltage divider that feeds the V2P pin in the HLW8012
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// * The VOLTAGE_RESISTOR_DOWNSTREAM is the 1kOhm resistor in the voltage divider that feeds the V2P pin in the HLW8012
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hlw8012.setResistors(POW_CURRENT_R, POW_VOLTAGE_R_UP, POW_VOLTAGE_R_DOWN);
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// Retrieve calibration values
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powRetrieveCalibration();
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// Recover energy reading
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retrieveEnergy();
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// API definitions
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apiRegister("/api/power", "power", [](char * buffer, size_t len) {
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snprintf(buffer, len, "%d", getActivePower());
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});
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apiRegister("/api/energy", "energy", [](char * buffer, size_t len) {
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snprintf(buffer, len, "%ld", (unsigned long) _energy);
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});
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apiRegister("/api/current", "current", [](char * buffer, size_t len) {
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dtostrf(getCurrent(), len-1, 2, buffer);
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});
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apiRegister("/api/voltage", "voltage", [](char * buffer, size_t len) {
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snprintf(buffer, len, "%d", getVoltage());
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});
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}
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void powLoop() {
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static unsigned long last_update = 0;
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static unsigned char report_count = POW_REPORT_EVERY;
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static unsigned long power_sum = 0;
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static double current_sum = 0;
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static unsigned long voltage_sum = 0;
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static bool powWasEnabled = false;
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// POW is disabled while there is no internet connection
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// When the HLW8012 measurements are enabled back we reset the timer
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if (!_powEnabled) {
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powWasEnabled = false;
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return;
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}
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if (!powWasEnabled) {
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last_update = millis();
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powWasEnabled = true;
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}
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if (millis() - last_update > POW_UPDATE_INTERVAL) {
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last_update = millis();
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unsigned int power = getActivePower();
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unsigned int voltage = getVoltage();
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double current = getCurrent();
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unsigned int apparent = getApparentPower();
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unsigned int factor = getPowerFactor();
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unsigned int reactive = getReactivePower();
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power_sum += power;
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current_sum += current;
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voltage_sum += voltage;
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DynamicJsonBuffer jsonBuffer;
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JsonObject& root = jsonBuffer.createObject();
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root["powVisible"] = 1;
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root["powActivePower"] = power;
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root["powCurrent"] = current;
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root["powVoltage"] = voltage;
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root["powApparentPower"] = apparent;
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root["powReactivePower"] = reactive;
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root["powPowerFactor"] = factor;
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String output;
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root.printTo(output);
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wsSend(output.c_str());
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if (--report_count == 0) {
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power = power_sum / POW_REPORT_EVERY;
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current = current_sum / POW_REPORT_EVERY;
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voltage = voltage_sum / POW_REPORT_EVERY;
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apparent = current * voltage;
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reactive = (apparent > power) ? sqrt(apparent * apparent - power * power) : 0;
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factor = (apparent > 0) ? 100 * power / apparent : 100;
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if (factor > 100) factor = 100;
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double window = (double) POW_REPORT_EVERY * POW_UPDATE_INTERVAL / 1000.0 / 3600.0;
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_energy += power * window;
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saveEnergy();
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mqttSend(getSetting("powPowerTopic", POW_POWER_TOPIC).c_str(), String(power).c_str());
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mqttSend(getSetting("powEnergyTopic", POW_ENERGY_TOPIC).c_str(), String(_energy).c_str());
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mqttSend(getSetting("powCurrentTopic", POW_CURRENT_TOPIC).c_str(), String(current).c_str());
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mqttSend(getSetting("powVoltageTopic", POW_VOLTAGE_TOPIC).c_str(), String(voltage).c_str());
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mqttSend(getSetting("powAPowerTopic", POW_APOWER_TOPIC).c_str(), String(apparent).c_str());
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mqttSend(getSetting("powRPowerTopic", POW_RPOWER_TOPIC).c_str(), String(reactive).c_str());
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mqttSend(getSetting("powPFactorTopic", POW_PFACTOR_TOPIC).c_str(), String(factor).c_str());
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#if ENABLE_DOMOTICZ
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{
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char buffer[20];
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snprintf(buffer, 20, "%d;%ld", power, (unsigned long) _energy);
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domoticzSend("dczPowIdx", 0, buffer);
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snprintf(buffer, 20, "%d", voltage);
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domoticzSend("dczVoltIdx", 0, buffer);
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}
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#endif
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power_sum = current_sum = voltage_sum = 0;
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report_count = POW_REPORT_EVERY;
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}
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// Toggle between current and voltage monitoring
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#if POW_USE_INTERRUPTS == 0
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hlw8012.toggleMode();
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#endif
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}
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}
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#endif
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