[bl0942] Improve energy reporting (#7428)

esphome/components/bl0942/bl0942.cpp

@@ -137,6 +137,7 @@ void BL0942::setup() {
   }
 
   this->write_reg_(BL0942_REG_USR_WRPROT, BL0942_REG_USR_WRPROT_MAGIC);
+  if (this->reset_)
     this->write_reg_(BL0942_REG_SOFT_RESET, BL0942_REG_SOFT_RESET_MAGIC);
 
   uint32_t mode = BL0942_REG_MODE_DEFAULT;
@@ -196,6 +197,7 @@ void BL0942::received_package_(DataPacket *data) {
 
 void BL0942::dump_config() {  // NOLINT(readability-function-cognitive-complexity)
   ESP_LOGCONFIG(TAG, "BL0942:");
+  ESP_LOGCONFIG(TAG, "  Reset: %s", TRUEFALSE(this->reset_));
   ESP_LOGCONFIG(TAG, "  Address: %d", this->address_);
   ESP_LOGCONFIG(TAG, "  Nominal line frequency: %d Hz", this->line_freq_);
   ESP_LOGCONFIG(TAG, "  Current reference: %f", this->current_reference_);

esphome/components/bl0942/bl0942.h

@@ -93,6 +93,7 @@ class BL0942 : public PollingComponent, public uart::UARTDevice {
   void set_frequency_sensor(sensor::Sensor *frequency_sensor) { frequency_sensor_ = frequency_sensor; }
   void set_line_freq(LineFrequency freq) { this->line_freq_ = freq; }
   void set_address(uint8_t address) { this->address_ = address; }
+  void set_reset(bool reset) { this->reset_ = reset; }
   void set_current_reference(float current_ref) {
     this->current_reference_ = current_ref;
     this->current_reference_set_ = true;
@@ -137,6 +138,7 @@ class BL0942 : public PollingComponent, public uart::UARTDevice {
   float energy_reference_ = BL0942_EREF;
   bool energy_reference_set_ = false;
   uint8_t address_ = 0;
+  bool reset_ = false;
   LineFrequency line_freq_ = LINE_FREQUENCY_50HZ;
   uint32_t rx_start_ = 0;
   uint32_t prev_cf_cnt_ = 0;

esphome/components/bl0942/sensor.py

@@ -27,6 +27,7 @@ from esphome.const import (
 CONF_CURRENT_REFERENCE = "current_reference"
 CONF_ENERGY_REFERENCE = "energy_reference"
 CONF_POWER_REFERENCE = "power_reference"
+CONF_RESET = "reset"
 CONF_VOLTAGE_REFERENCE = "voltage_reference"
 
 DEPENDENCIES = ["uart"]
@@ -58,19 +59,19 @@ CONFIG_SCHEMA = (
             ),
             cv.Optional(CONF_POWER): sensor.sensor_schema(
                 unit_of_measurement=UNIT_WATT,
-                accuracy_decimals=0,
+                accuracy_decimals=1,
                 device_class=DEVICE_CLASS_POWER,
                 state_class=STATE_CLASS_MEASUREMENT,
             ),
             cv.Optional(CONF_ENERGY): sensor.sensor_schema(
                 unit_of_measurement=UNIT_KILOWATT_HOURS,
-                accuracy_decimals=0,
+                accuracy_decimals=3,
                 device_class=DEVICE_CLASS_ENERGY,
                 state_class=STATE_CLASS_TOTAL_INCREASING,
             ),
             cv.Optional(CONF_FREQUENCY): sensor.sensor_schema(
                 unit_of_measurement=UNIT_HERTZ,
-                accuracy_decimals=0,
+                accuracy_decimals=2,
                 device_class=DEVICE_CLASS_FREQUENCY,
                 state_class=STATE_CLASS_MEASUREMENT,
             ),
@@ -82,6 +83,7 @@ CONFIG_SCHEMA = (
                 ),
             ),
             cv.Optional(CONF_ADDRESS, default=0): cv.int_range(min=0, max=3),
+            cv.Optional(CONF_RESET, default=True): cv.boolean,
             cv.Optional(CONF_CURRENT_REFERENCE): cv.float_,
             cv.Optional(CONF_ENERGY_REFERENCE): cv.float_,
             cv.Optional(CONF_POWER_REFERENCE): cv.float_,
@@ -115,6 +117,7 @@ async def to_code(config):
         cg.add(var.set_frequency_sensor(sens))
     cg.add(var.set_line_freq(config[CONF_LINE_FREQUENCY]))
     cg.add(var.set_address(config[CONF_ADDRESS]))
+    cg.add(var.set_reset(config[CONF_RESET]))
     if (current_reference := config.get(CONF_CURRENT_REFERENCE, None)) is not None:
         cg.add(var.set_current_reference(current_reference))
     if (voltage_reference := config.get(CONF_VOLTAGE_REFERENCE, None)) is not None:

tests/components/bl0942/test.bk72xx-ard.yaml

@@ -10,6 +10,7 @@ sensor:
   - platform: bl0942
     address: 0
     line_frequency: 50Hz
+    reset: false
     voltage:
       name: BL0942 Voltage
     current:

tests/components/bl0942/test.esp32-ard.yaml

@@ -8,6 +8,7 @@ uart:
 
 sensor:
   - platform: bl0942
+    reset: true
     voltage:
       name: BL0942 Voltage
     current: