Use energy data from HLW8012.

code/espurna/config/general.h

@@ -430,6 +430,7 @@ PROGMEM const char* const custom_reset_string[] = {
 #define MQTT_TOPIC_POWER_REACTIVE   "reactive"
 #define MQTT_TOPIC_POWER_FACTOR     "factor"
 #define MQTT_TOPIC_ENERGY           "energy"
+#define MQTT_TOPIC_ENERGY_TOTAL     "energy_total"
 
 // Light module
 #define MQTT_TOPIC_CHANNEL      "channel"
@@ -523,6 +524,12 @@ PROGMEM const char* const custom_reset_string[] = {
 #define POWER_HAS_ACTIVE                0
 #endif
 
+#if (POWER_PROVIDER == POWER_PROVIDER_HLW8012)
+#define POWER_HAS_ENERGY                1
+#else
+#define POWER_HAS_ENERGY                0
+#endif
+
 #define POWER_VOLTAGE                   230     // Default voltage
 #define POWER_READ_INTERVAL             6000    // Default reading interval (6 seconds)
 #define POWER_REPORT_INTERVAL           60000   // Default report interval (1 minute)
@@ -530,7 +537,8 @@ PROGMEM const char* const custom_reset_string[] = {
 #define POWER_CURRENT_DECIMALS          2       // Decimals for current values
 #define POWER_VOLTAGE_DECIMALS          0       // Decimals for voltage values
 #define POWER_POWER_DECIMALS            0       // Decimals for power values
-#define POWER_ENERGY_FACTOR             (POWER_REPORT_INTERVAL / 1000.0 / 3600.0)
+#define POWER_ENERGY_DECIMALS           3       // Decimals for energy values
+#define POWER_ENERGY_FACTOR             (1. / 3600.0) // Ws => Wh
 
 #if POWER_PROVIDER == POWER_PROVIDER_EMON_ANALOG
     #define EMON_CURRENT_RATIO          30      // Current ratio in the clamp (30V/1A)

code/espurna/power.ino

@@ -23,6 +23,7 @@ bool _power_newdata = false;
 double _power_current = 0;
 double _power_voltage = 0;
 double _power_apparent = 0;
+double _power_energy = 0;
 MedianFilter _filter_current = MedianFilter(POWER_REPORT_BUFFER);
 
 #if POWER_HAS_ACTIVE
@@ -34,6 +35,10 @@ MedianFilter _filter_current = MedianFilter(POWER_REPORT_BUFFER);
     MedianFilter _filter_apparent = MedianFilter(POWER_REPORT_BUFFER);
 #endif
 
+#if POWER_HAS_ENERGY
+    double _power_last_energy = 0;
+#endif
+
 // -----------------------------------------------------------------------------
 // PRIVATE METHODS
 // -----------------------------------------------------------------------------
@@ -101,6 +106,9 @@ void _powerRead() {
         double factor = (apparent > 0) ? active / apparent : 1;
         if (factor > 1) factor = 1;
     #endif
+    #if POWER_HAS_ENERGY
+        _power_energy = _powerEnergy(); //Due to its nature this value doesn't have to be filtered
+    #endif
 
     // Filters
     _filter_current.add(current);
@@ -132,6 +140,7 @@ void _powerRead() {
             root["pwrCurrent"] = roundTo(current, POWER_CURRENT_DECIMALS);
             root["pwrVoltage"] = roundTo(voltage, POWER_VOLTAGE_DECIMALS);
             root["pwrApparent"] = roundTo(apparent, POWER_POWER_DECIMALS);
+            root["pwrEnergy"] = roundTo(_power_energy * POWER_ENERGY_FACTOR, POWER_ENERGY_DECIMALS);
             #if POWER_HAS_ACTIVE
                 root["pwrActive"] = roundTo(active, POWER_POWER_DECIMALS);
                 root["pwrReactive"] = roundTo(reactive, POWER_POWER_DECIMALS);
@@ -174,18 +183,26 @@ void _powerReport() {
         _power_apparent = _power_current * _power_voltage;
         double power = _power_apparent;
     #endif
-    double energy_delta = power * POWER_ENERGY_FACTOR;
+    #if POWER_HAS_ENERGY
+        double energy_delta = _power_energy - _power_last_energy;
+        _power_last_energy = _power_energy;
+    #else
+        double energy_delta = power * (POWER_REPORT_INTERVAL / 1000.);
+        _power_energy += energy_delta;
+    #endif
     _power_ready = true;
 
     char buf_current[10];
     char buf_energy[10];
+    char buf_energy_total[10];
     dtostrf(_power_current, 1-sizeof(buf_current), POWER_CURRENT_DECIMALS, buf_current);
-    dtostrf(energy_delta, 1-sizeof(buf_energy), POWER_CURRENT_DECIMALS, buf_energy);
-
+    dtostrf(energy_delta * POWER_ENERGY_FACTOR, 1-sizeof(buf_energy), POWER_ENERGY_DECIMALS, buf_energy);
+    dtostrf(_power_energy * POWER_ENERGY_FACTOR, 1-sizeof(buf_energy_total), POWER_ENERGY_DECIMALS, buf_energy_total);
     {
         mqttSend(MQTT_TOPIC_CURRENT, buf_current);
         mqttSend(MQTT_TOPIC_POWER_APPARENT, String((int) _power_apparent).c_str());
         mqttSend(MQTT_TOPIC_ENERGY, buf_energy);
+        mqttSend(MQTT_TOPIC_ENERGY_TOTAL, buf_energy_total);
         #if POWER_HAS_ACTIVE
             mqttSend(MQTT_TOPIC_POWER_ACTIVE, String((int) _power_active).c_str());
             mqttSend(MQTT_TOPIC_POWER_REACTIVE, String((int) _power_reactive).c_str());
@@ -214,6 +231,7 @@ void _powerReport() {
         influxDBSend(MQTT_TOPIC_CURRENT, buf_current);
         influxDBSend(MQTT_TOPIC_POWER_APPARENT, String((int) _power_apparent).c_str());
         influxDBSend(MQTT_TOPIC_ENERGY, buf_energy);
+        influxDBSend(MQTT_TOPIC_ENERGY_TOTAL, buf_energy_total);
         #if POWER_HAS_ACTIVE
             influxDBSend(MQTT_TOPIC_POWER_ACTIVE, String((int) _power_active).c_str());
             influxDBSend(MQTT_TOPIC_POWER_REACTIVE, String((int) _power_reactive).c_str());

code/espurna/power_hlw8012.ino

@@ -75,6 +75,10 @@ double _powerPowerFactor() {
     return _hlw8012.getPowerFactor();
 }
 
+double _powerEnergy() {
+    return _hlw8012.getEnergy();
+}
+
 void _powerEnabledProvider() {
     if (_power_enabled) {
         attachInterrupt(HLW8012_CF1_PIN, _hlw_cf1_isr, CHANGE);
@@ -128,13 +132,16 @@ void _powerSetupProvider() {
 
     _hlwRestoreCalibration();
 
-    _power_wifi_onconnect = WiFi.onStationModeGotIP([](WiFiEventStationModeGotIP ipInfo) {
-        powerEnabled(true);
-    });
-    _power_wifi_ondisconnect = WiFi.onStationModeDisconnected([](WiFiEventStationModeDisconnected ipInfo) {
-        powerEnabled(false);
-    });
-
+    #if HLW8012_USE_INTERRUPTS
+        powerEnabled(true); //Always keep measurement active to keep track of energy used
+    #else
+        _power_wifi_onconnect = WiFi.onStationModeGotIP([](WiFiEventStationModeGotIP ipInfo) {
+            powerEnabled(true);
+        });
+        _power_wifi_ondisconnect = WiFi.onStationModeDisconnected([](WiFiEventStationModeDisconnected ipInfo) {
+            powerEnabled(false);
+        });
+    #endif
 }
 
 void _powerLoopProvider(bool before) {