CSE7766 Apparent Power & Power Factor calculations (#6292)

esphome/components/cse7766/cse7766.cpp

@@ -173,6 +173,32 @@ void CSE7766Component::parse_data_() {
     }
   }
 
+  if (have_voltage && have_current) {
+    const float apparent_power = voltage * current;
+    if (this->apparent_power_sensor_ != nullptr) {
+      this->apparent_power_sensor_->publish_state(apparent_power);
+    }
+    if (this->power_factor_sensor_ != nullptr && (have_power || power_cycle_exceeds_range)) {
+      float pf = NAN;
+      if (apparent_power > 0) {
+        pf = power / apparent_power;
+        if (pf < 0 || pf > 1) {
+          ESP_LOGD(TAG, "Impossible power factor: %.4f not in interval [0, 1]", pf);
+          pf = NAN;
+        }
+      } else if (apparent_power == 0 && power == 0) {
+        // No load, report ideal power factor
+        pf = 1.0f;
+      } else if (current == 0 && calculated_current <= 0.05f) {
+        // Datasheet: minimum measured current is 50mA
+        ESP_LOGV(TAG, "Can't calculate power factor (current below minimum for CSE7766)");
+      } else {
+        ESP_LOGW(TAG, "Can't calculate power factor from P = %.4f W, S = %.4f VA", power, apparent_power);
+      }
+      this->power_factor_sensor_->publish_state(pf);
+    }
+  }
+
 #if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
   {
     std::stringstream ss;
@@ -205,6 +231,8 @@ void CSE7766Component::dump_config() {
   LOG_SENSOR("  ", "Current", this->current_sensor_);
   LOG_SENSOR("  ", "Power", this->power_sensor_);
   LOG_SENSOR("  ", "Energy", this->energy_sensor_);
+  LOG_SENSOR("  ", "Apparent Power", this->apparent_power_sensor_);
+  LOG_SENSOR("  ", "Power Factor", this->power_factor_sensor_);
   this->check_uart_settings(4800);
 }
 

esphome/components/cse7766/cse7766.h

@@ -13,6 +13,10 @@ class CSE7766Component : public Component, public uart::UARTDevice {
   void set_current_sensor(sensor::Sensor *current_sensor) { current_sensor_ = current_sensor; }
   void set_power_sensor(sensor::Sensor *power_sensor) { power_sensor_ = power_sensor; }
   void set_energy_sensor(sensor::Sensor *energy_sensor) { energy_sensor_ = energy_sensor; }
+  void set_apparent_power_sensor(sensor::Sensor *apparent_power_sensor) {
+    apparent_power_sensor_ = apparent_power_sensor;
+  }
+  void set_power_factor_sensor(sensor::Sensor *power_factor_sensor) { power_factor_sensor_ = power_factor_sensor; }
 
   void loop() override;
   float get_setup_priority() const override;
@@ -30,6 +34,8 @@ class CSE7766Component : public Component, public uart::UARTDevice {
   sensor::Sensor *current_sensor_{nullptr};
   sensor::Sensor *power_sensor_{nullptr};
   sensor::Sensor *energy_sensor_{nullptr};
+  sensor::Sensor *apparent_power_sensor_{nullptr};
+  sensor::Sensor *power_factor_sensor_{nullptr};
   uint32_t cf_pulses_total_{0};
   uint16_t cf_pulses_last_{0};
 };

esphome/components/cse7766/sensor.py

@@ -2,19 +2,24 @@ import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.components import sensor, uart
 from esphome.const import (
+    CONF_APPARENT_POWER,
     CONF_CURRENT,
     CONF_ENERGY,
     CONF_ID,
     CONF_POWER,
+    CONF_POWER_FACTOR,
     CONF_VOLTAGE,
+    DEVICE_CLASS_APPARENT_POWER,
     DEVICE_CLASS_CURRENT,
     DEVICE_CLASS_ENERGY,
     DEVICE_CLASS_POWER,
+    DEVICE_CLASS_POWER_FACTOR,
     DEVICE_CLASS_VOLTAGE,
     STATE_CLASS_MEASUREMENT,
     STATE_CLASS_TOTAL_INCREASING,
-    UNIT_VOLT,
     UNIT_AMPERE,
+    UNIT_VOLT,
+    UNIT_VOLT_AMPS,
     UNIT_WATT,
     UNIT_WATT_HOURS,
 )
@@ -51,6 +56,17 @@ CONFIG_SCHEMA = cv.Schema(
             device_class=DEVICE_CLASS_ENERGY,
             state_class=STATE_CLASS_TOTAL_INCREASING,
         ),
+        cv.Optional(CONF_APPARENT_POWER): sensor.sensor_schema(
+            unit_of_measurement=UNIT_VOLT_AMPS,
+            accuracy_decimals=1,
+            device_class=DEVICE_CLASS_APPARENT_POWER,
+            state_class=STATE_CLASS_MEASUREMENT,
+        ),
+        cv.Optional(CONF_POWER_FACTOR): sensor.sensor_schema(
+            accuracy_decimals=2,
+            device_class=DEVICE_CLASS_POWER_FACTOR,
+            state_class=STATE_CLASS_MEASUREMENT,
+        ),
     }
 ).extend(uart.UART_DEVICE_SCHEMA)
 FINAL_VALIDATE_SCHEMA = uart.final_validate_device_schema(
@@ -75,3 +91,9 @@ async def to_code(config):
     if energy_config := config.get(CONF_ENERGY):
         sens = await sensor.new_sensor(energy_config)
         cg.add(var.set_energy_sensor(sens))
+    if apparent_power_config := config.get(CONF_APPARENT_POWER):
+        sens = await sensor.new_sensor(apparent_power_config)
+        cg.add(var.set_apparent_power_sensor(sens))
+    if power_factor_config := config.get(CONF_POWER_FACTOR):
+        sens = await sensor.new_sensor(power_factor_config)
+        cg.add(var.set_power_factor_sensor(sens))

tests/test3.yaml

@@ -634,7 +634,11 @@ sensor:
     current:
       name: CSE7766 Current
     power:
-      name: CSE776 Power
+      name: CSE7766 Power
+    apparent_power:
+      name: CSE7766 Apparent Power
+    power_factor:
+      name: CSE7766 Power Factor
 
   - platform: fingerprint_grow
     fingerprint_count: