Fork of the espurna firmware for `mhsw` switches
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/*
ESPurna
EMON MODULE
Copyright (C) 2016 by Xose Pérez <xose dot perez at gmail dot com>
*/
#if ENABLE_EMON
#include <EmonLiteESP.h>
EmonLiteESP emon;
double current;
char power[8];
// -----------------------------------------------------------------------------
// EMON
// -----------------------------------------------------------------------------
void setCurrentRatio(float value) {
emon.setCurrentRatio(value);
}
char * getPower() {
return power;
}
double getCurrent() {
return current;
}
unsigned int currentCallback() {
return analogRead(EMON_CURRENT_PIN);
}
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);
}
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
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();
//DEBUG_MSG("[ENERGY] Power now: %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) {
double p = (sum - max - min) * mainsVoltage / (measurements - 2);
sprintf(power, "%d", int(p));
mqttSend(getSetting("emonPowerTopic", EMON_POWER_TOPIC).c_str(), power);
sum = 0;
measurements = 0;
}
next_measurement += EMON_INTERVAL;
}
}
#endif