ESPHome 2025.6.3
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sdm_meter.cpp
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1#include "sdm_meter.h"
4#include "esphome/core/log.h"
5
6namespace esphome {
7namespace sdm_meter {
8
9static const char *const TAG = "sdm_meter";
10
11static const uint8_t MODBUS_CMD_READ_IN_REGISTERS = 0x04;
12static const uint8_t MODBUS_REGISTER_COUNT = 80; // 74 x 16-bit registers
13
14void SDMMeter::on_modbus_data(const std::vector<uint8_t> &data) {
15 if (data.size() < MODBUS_REGISTER_COUNT * 2) {
16 ESP_LOGW(TAG, "Invalid size for SDMMeter!");
17 return;
18 }
19
20 auto sdm_meter_get_float = [&](size_t i) -> float {
21 uint32_t temp = encode_uint32(data[i], data[i + 1], data[i + 2], data[i + 3]);
22 float f;
23 memcpy(&f, &temp, sizeof(f));
24 return f;
25 };
26
27 for (uint8_t i = 0; i < 3; i++) {
28 auto phase = this->phases_[i];
29 if (!phase.setup)
30 continue;
31
32 float voltage = sdm_meter_get_float(SDM_PHASE_1_VOLTAGE * 2 + (i * 4));
33 float current = sdm_meter_get_float(SDM_PHASE_1_CURRENT * 2 + (i * 4));
34 float active_power = sdm_meter_get_float(SDM_PHASE_1_ACTIVE_POWER * 2 + (i * 4));
35 float apparent_power = sdm_meter_get_float(SDM_PHASE_1_APPARENT_POWER * 2 + (i * 4));
36 float reactive_power = sdm_meter_get_float(SDM_PHASE_1_REACTIVE_POWER * 2 + (i * 4));
37 float power_factor = sdm_meter_get_float(SDM_PHASE_1_POWER_FACTOR * 2 + (i * 4));
38 float phase_angle = sdm_meter_get_float(SDM_PHASE_1_ANGLE * 2 + (i * 4));
39
40 ESP_LOGD(
41 TAG,
42 "SDMMeter Phase %c: V=%.3f V, I=%.3f A, Active P=%.3f W, Apparent P=%.3f VA, Reactive P=%.3f var, PF=%.3f, "
43 "PA=%.3f °",
44 i + 'A', voltage, current, active_power, apparent_power, reactive_power, power_factor, phase_angle);
45 if (phase.voltage_sensor_ != nullptr)
46 phase.voltage_sensor_->publish_state(voltage);
47 if (phase.current_sensor_ != nullptr)
48 phase.current_sensor_->publish_state(current);
49 if (phase.active_power_sensor_ != nullptr)
50 phase.active_power_sensor_->publish_state(active_power);
51 if (phase.apparent_power_sensor_ != nullptr)
52 phase.apparent_power_sensor_->publish_state(apparent_power);
53 if (phase.reactive_power_sensor_ != nullptr)
54 phase.reactive_power_sensor_->publish_state(reactive_power);
55 if (phase.power_factor_sensor_ != nullptr)
56 phase.power_factor_sensor_->publish_state(power_factor);
57 if (phase.phase_angle_sensor_ != nullptr)
58 phase.phase_angle_sensor_->publish_state(phase_angle);
59 }
60
61 float total_power = sdm_meter_get_float(SDM_TOTAL_SYSTEM_POWER * 2);
62 float frequency = sdm_meter_get_float(SDM_FREQUENCY * 2);
63 float import_active_energy = sdm_meter_get_float(SDM_IMPORT_ACTIVE_ENERGY * 2);
64 float export_active_energy = sdm_meter_get_float(SDM_EXPORT_ACTIVE_ENERGY * 2);
65 float import_reactive_energy = sdm_meter_get_float(SDM_IMPORT_REACTIVE_ENERGY * 2);
66 float export_reactive_energy = sdm_meter_get_float(SDM_EXPORT_REACTIVE_ENERGY * 2);
67
68 ESP_LOGD(TAG, "SDMMeter: F=%.3f Hz, Im.A.E=%.3f Wh, Ex.A.E=%.3f Wh, Im.R.E=%.3f VARh, Ex.R.E=%.3f VARh, T.P=%.3f W",
69 frequency, import_active_energy, export_active_energy, import_reactive_energy, export_reactive_energy,
70 total_power);
71
72 if (this->total_power_sensor_ != nullptr)
73 this->total_power_sensor_->publish_state(total_power);
74 if (this->frequency_sensor_ != nullptr)
75 this->frequency_sensor_->publish_state(frequency);
76 if (this->import_active_energy_sensor_ != nullptr)
77 this->import_active_energy_sensor_->publish_state(import_active_energy);
78 if (this->export_active_energy_sensor_ != nullptr)
79 this->export_active_energy_sensor_->publish_state(export_active_energy);
80 if (this->import_reactive_energy_sensor_ != nullptr)
81 this->import_reactive_energy_sensor_->publish_state(import_reactive_energy);
82 if (this->export_reactive_energy_sensor_ != nullptr)
83 this->export_reactive_energy_sensor_->publish_state(export_reactive_energy);
84}
85
86void SDMMeter::update() { this->send(MODBUS_CMD_READ_IN_REGISTERS, 0, MODBUS_REGISTER_COUNT); }
88 ESP_LOGCONFIG(TAG,
89 "SDM Meter:\n"
90 " Address: 0x%02X",
91 this->address_);
92 for (uint8_t i = 0; i < 3; i++) {
93 auto phase = this->phases_[i];
94 if (!phase.setup)
95 continue;
96 ESP_LOGCONFIG(TAG, " Phase %c", i + 'A');
97 LOG_SENSOR(" ", "Voltage", phase.voltage_sensor_);
98 LOG_SENSOR(" ", "Current", phase.current_sensor_);
99 LOG_SENSOR(" ", "Active Power", phase.active_power_sensor_);
100 LOG_SENSOR(" ", "Apparent Power", phase.apparent_power_sensor_);
101 LOG_SENSOR(" ", "Reactive Power", phase.reactive_power_sensor_);
102 LOG_SENSOR(" ", "Power Factor", phase.power_factor_sensor_);
103 LOG_SENSOR(" ", "Phase Angle", phase.phase_angle_sensor_);
104 }
105 LOG_SENSOR(" ", "Total Power", this->total_power_sensor_);
106 LOG_SENSOR(" ", "Frequency", this->frequency_sensor_);
107 LOG_SENSOR(" ", "Import Active Energy", this->import_active_energy_sensor_);
108 LOG_SENSOR(" ", "Export Active Energy", this->export_active_energy_sensor_);
109 LOG_SENSOR(" ", "Import Reactive Energy", this->import_reactive_energy_sensor_);
110 LOG_SENSOR(" ", "Export Reactive Energy", this->export_reactive_energy_sensor_);
111}
112
113} // namespace sdm_meter
114} // namespace esphome
uint16_le_t frequency
Definition bl0942.h:6
void send(uint8_t function, uint16_t start_address, uint16_t number_of_entities, uint8_t payload_len=0, const uint8_t *payload=nullptr)
Definition modbus.h:62
sensor::Sensor * export_active_energy_sensor_
Definition sdm_meter.h:77
void on_modbus_data(const std::vector< uint8_t > &data) override
Definition sdm_meter.cpp:14
sensor::Sensor * total_power_sensor_
Definition sdm_meter.h:75
void dump_config() override
Definition sdm_meter.cpp:87
sensor::Sensor * export_reactive_energy_sensor_
Definition sdm_meter.h:79
struct esphome::sdm_meter::SDMMeter::SDMPhase phases_[3]
sensor::Sensor * import_active_energy_sensor_
Definition sdm_meter.h:76
sensor::Sensor * import_reactive_energy_sensor_
Definition sdm_meter.h:78
sensor::Sensor * frequency_sensor_
Definition sdm_meter.h:74
void publish_state(float state)
Publish a new state to the front-end.
Definition sensor.cpp:39
Providing packet encoding functions for exchanging data with a remote host.
Definition a01nyub.cpp:7
constexpr uint32_t encode_uint32(uint8_t byte1, uint8_t byte2, uint8_t byte3, uint8_t byte4)
Encode a 32-bit value given four bytes in most to least significant byte order.
Definition helpers.h:200