/* EMON MODULE Copyright (C) 2016-2017 by Xose PĂ©rez */ #if ENABLE_EMON #include #include "brzo_i2c.h" #include // 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; double _current = 0; unsigned int _power = 0; double _energy = 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 } // ----------------------------------------------------------------------------- // EMON // ----------------------------------------------------------------------------- void setCurrentRatio(float value) { emon.setCurrentRatio(value); } unsigned int getPower() { return _power; } double getEnergy() { return _energy; } double getCurrent() { return _current; } void retrieveEnergy() { unsigned long energy = EEPROM.read(EEPROM_POWER_COUNT + 1); energy = (energy << 8) + EEPROM.read(EEPROM_POWER_COUNT); if (energy == 0xFFFF) energy = 0; _energy = energy; } void saveEnergy() { unsigned int energy = (int) _energy; EEPROM.write(EEPROM_POWER_COUNT, energy & 0xFF); EEPROM.write(EEPROM_POWER_COUNT + 1, (energy >> 8) & 0xFF); EEPROM.commit(); } void powerMonitorSetup() { // backwards compatibility String tmp; tmp = getSetting("pwMainsVoltage", EMON_MAINS_VOLTAGE); setSetting("emonMains", tmp); delSetting("pwMainsVoltage"); 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("/api/power", "power", [](char * buffer, size_t len) { snprintf(buffer, len, "%d", _power); }); apiRegister("/api/energy", "energy", [](char * buffer, size_t len) { snprintf(buffer, len, "%ld", (unsigned long) _energy); }); retrieveEnergy(); } 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 (!mqttConnected()) return; if (warmup) { warmup = false; emon.warmup(); } if (millis() > next_measurement) { // Safety check: do not read current if relay is OFF // You could be monitoring another line with the current clamp... //if (!relayStatus(0)) { // _current = 0; //} else { _current = emon.getCurrent(EMON_SAMPLES); _current -= EMON_CURRENT_OFFSET; if (_current < 0) _current = 0; //} if (measurements == 0) { max = min = _current; } else { if (_current > max) max = _current; if (_current < min) min = _current; } sum += _current; ++measurements; float mainsVoltage = getSetting("emonMains", EMON_MAINS_VOLTAGE).toFloat(); char current[6]; dtostrf(_current, 5, 2, current); DEBUG_MSG("[ENERGY] Current: %sA\n", current); DEBUG_MSG("[ENERGY] Power: %dW\n", int(_current * mainsVoltage)); // Update websocket clients char text[20]; sprintf_P(text, PSTR("{\"emonPower\": %d}"), int(_current * mainsVoltage)); wsSend(text); // Send MQTT messages averaged every EMON_MEASUREMENTS if (measurements == EMON_MEASUREMENTS) { _power = (int) ((sum - max - min) * mainsVoltage / (measurements - 2)); double window = (double) EMON_INTERVAL * EMON_MEASUREMENTS / 1000.0 / 3600.0; _energy += _power * window; saveEnergy(); sum = 0; measurements = 0; char power[6]; snprintf(power, 6, "%d", _power); char energy[8]; snprintf(energy, 8, "%ld", (unsigned long) _energy); mqttSend(getSetting("emonPowerTopic", EMON_POWER_TOPIC).c_str(), power); mqttSend(getSetting("emonEnergyTopic", EMON_ENERGY_TOPIC).c_str(), energy); #if ENABLE_DOMOTICZ { char buffer[20]; snprintf(buffer, 20, "%s;%s", power, energy); domoticzSend("dczPowIdx", 0, buffer); } #endif } next_measurement += EMON_INTERVAL; } } #endif