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97 lines
2.6 KiB
97 lines
2.6 KiB
/*
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ESPurna
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EMON MODULE
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Copyright (C) 2016 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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EmonLiteESP emon;
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double current;
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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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double getCurrent() {
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return current;
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}
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unsigned int currentCallback() {
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return analogRead(EMON_CURRENT_PIN);
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}
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void powerMonitorSetup() {
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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("pwCurrentRatio", String(EMON_CURRENT_RATIO)).toFloat()
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);
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emon.setPrecision(EMON_CURRENT_PRECISION);
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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 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 (millis() > next_measurement) {
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// Safety check: do not read current if relay is OFF
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if (!digitalRead(RELAY_PIN)) {
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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("pwMainsVoltage", String(EMON_MAINS_VOLTAGE)).toFloat();
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//DEBUG_MSG("[ENERGY] Power now: %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("{\"power\": %d}"), int(current * mainsVoltage));
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webSocketSend(text);
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// Send MQTT messages averaged every EMON_MEASUREMENTS
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if (measurements == EMON_MEASUREMENTS) {
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char buffer[8];
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double power = (sum - max - min) * mainsVoltage / (measurements - 2);
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sprintf(buffer, "%d", int(power));
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mqttSend((char *) getSetting("emonPowerTopic", EMON_POWER_TOPIC).c_str(), buffer);
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sum = 0;
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measurements = 0;
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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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