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Code Issues Releases Wiki Activity

[bl0940] extend configuration options of bl0940 device (#8158)

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
This commit is contained in:
Daniel M
2025-09-10 13:50:49 +12:00
committed by GitHub
parent d9f625e5c8
commit ac61b8f893
12 changed files with 687 additions and 115 deletions
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2
CODEOWNERS
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@@ -66,7 +66,7 @@ esphome/components/binary_sensor/* @esphome/core
esphome/components/bk72xx/* @kuba2k2
esphome/components/bl0906/* @athom-tech @jesserockz @tarontop
esphome/components/bl0939/* @ziceva
esphome/components/bl0940/* @tobias-
esphome/components/bl0940/* @dan-s-github @tobias-
esphome/components/bl0942/* @dbuezas @dwmw2
esphome/components/ble_client/* @buxtronix @clydebarrow
esphome/components/bluetooth_proxy/* @bdraco @jesserockz

7
esphome/components/bl0940/__init__.py
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@@ -1 +1,6 @@
CODEOWNERS = ["@tobias-"]
import esphome.codegen as cg
CODEOWNERS = ["@tobias-", "@dan-s-github"]
CONF_BL0940_ID = "bl0940_id"
bl0940_ns = cg.esphome_ns.namespace("bl0940")

219
esphome/components/bl0940/bl0940.cpp
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@@ -7,28 +7,26 @@ namespace bl0940 {
static const char *const TAG = "bl0940";
static const uint8_t BL0940_READ_COMMAND = 0x50; // 0x58 according to documentation
static const uint8_t BL0940_FULL_PACKET = 0xAA;
static const uint8_t BL0940_PACKET_HEADER = 0x55; // 0x58 according to documentation
static const uint8_t BL0940_PACKET_HEADER = 0x55; // 0x58 according to en doc but 0x55 in cn doc
static const uint8_t BL0940_WRITE_COMMAND = 0xA0; // 0xA8 according to documentation
static const uint8_t BL0940_REG_I_FAST_RMS_CTRL = 0x10;
static const uint8_t BL0940_REG_MODE = 0x18;
static const uint8_t BL0940_REG_SOFT_RESET = 0x19;
static const uint8_t BL0940_REG_USR_WRPROT = 0x1A;
static const uint8_t BL0940_REG_TPS_CTRL = 0x1B;
const uint8_t BL0940_INIT[5][6] = {
static const uint8_t BL0940_INIT[5][5] = {
// Reset to default
{BL0940_WRITE_COMMAND, BL0940_REG_SOFT_RESET, 0x5A, 0x5A, 0x5A, 0x38},
{BL0940_REG_SOFT_RESET, 0x5A, 0x5A, 0x5A, 0x38},
// Enable User Operation Write
{BL0940_WRITE_COMMAND, BL0940_REG_USR_WRPROT, 0x55, 0x00, 0x00, 0xF0},
{BL0940_REG_USR_WRPROT, 0x55, 0x00, 0x00, 0xF0},
// 0x0100 = CF_UNABLE energy pulse, AC_FREQ_SEL 50Hz, RMS_UPDATE_SEL 800mS
{BL0940_WRITE_COMMAND, BL0940_REG_MODE, 0x00, 0x10, 0x00, 0x37},
{BL0940_REG_MODE, 0x00, 0x10, 0x00, 0x37},
// 0x47FF = Over-current and leakage alarm on, Automatic temperature measurement, Interval 100mS
{BL0940_WRITE_COMMAND, BL0940_REG_TPS_CTRL, 0xFF, 0x47, 0x00, 0xFE},
{BL0940_REG_TPS_CTRL, 0xFF, 0x47, 0x00, 0xFE},
// 0x181C = Half cycle, Fast RMS threshold 6172
{BL0940_WRITE_COMMAND, BL0940_REG_I_FAST_RMS_CTRL, 0x1C, 0x18, 0x00, 0x1B}};
{BL0940_REG_I_FAST_RMS_CTRL, 0x1C, 0x18, 0x00, 0x1B}};
void BL0940::loop() {
DataPacket buffer;
@@ -36,8 +34,8 @@ void BL0940::loop() {
return;
}
if (read_array((uint8_t *) &buffer, sizeof(buffer))) {
if (validate_checksum(&buffer)) {
received_package_(&buffer);
if (this->validate_checksum_(&buffer)) {
this->received_package_(&buffer);
}
} else {
ESP_LOGW(TAG, "Junk on wire. Throwing away partial message");
@@ -46,35 +44,151 @@ void BL0940::loop() {
}
}
bool BL0940::validate_checksum(const DataPacket *data) {
uint8_t checksum = BL0940_READ_COMMAND;
bool BL0940::validate_checksum_(DataPacket *data) {
uint8_t checksum = this->read_command_;
// Whole package but checksum
for (uint32_t i = 0; i < sizeof(data->raw) - 1; i++) {
checksum += data->raw[i];
uint8_t *raw = (uint8_t *) data;
for (uint32_t i = 0; i < sizeof(*data) - 1; i++) {
checksum += raw[i];
}
checksum ^= 0xFF;
if (checksum != data->checksum) {
ESP_LOGW(TAG, "BL0940 invalid checksum! 0x%02X != 0x%02X", checksum, data->checksum);
ESP_LOGW(TAG, "Invalid checksum! 0x%02X != 0x%02X", checksum, data->checksum);
}
return checksum == data->checksum;
}
void BL0940::update() {
this->flush();
this->write_byte(BL0940_READ_COMMAND);
this->write_byte(this->read_command_);
this->write_byte(BL0940_FULL_PACKET);
}
void BL0940::setup() {
#ifdef USE_NUMBER
// add calibration callbacks
if (this->voltage_calibration_number_ != nullptr) {
this->voltage_calibration_number_->add_on_state_callback(
[this](float state) { this->voltage_calibration_callback_(state); });
if (this->voltage_calibration_number_->has_state()) {
this->voltage_calibration_callback_(this->voltage_calibration_number_->state);
}
}
if (this->current_calibration_number_ != nullptr) {
this->current_calibration_number_->add_on_state_callback(
[this](float state) { this->current_calibration_callback_(state); });
if (this->current_calibration_number_->has_state()) {
this->current_calibration_callback_(this->current_calibration_number_->state);
}
}
if (this->power_calibration_number_ != nullptr) {
this->power_calibration_number_->add_on_state_callback(
[this](float state) { this->power_calibration_callback_(state); });
if (this->power_calibration_number_->has_state()) {
this->power_calibration_callback_(this->power_calibration_number_->state);
}
}
if (this->energy_calibration_number_ != nullptr) {
this->energy_calibration_number_->add_on_state_callback(
[this](float state) { this->energy_calibration_callback_(state); });
if (this->energy_calibration_number_->has_state()) {
this->energy_calibration_callback_(this->energy_calibration_number_->state);
}
}
#endif
// calculate calibrated reference values
this->voltage_reference_cal_ = this->voltage_reference_ / this->voltage_cal_;
this->current_reference_cal_ = this->current_reference_ / this->current_cal_;
this->power_reference_cal_ = this->power_reference_ / this->power_cal_;
this->energy_reference_cal_ = this->energy_reference_ / this->energy_cal_;
for (auto *i : BL0940_INIT) {
this->write_array(i, 6);
this->write_byte(this->write_command_), this->write_array(i, 5);
delay(1);
}
this->flush();
}
float BL0940::update_temp_(sensor::Sensor *sensor, ube16_t temperature) const {
auto tb = (float) (temperature.h << 8 | temperature.l);
float BL0940::calculate_power_reference_() {
// calculate power reference based on voltage and current reference
return this->voltage_reference_cal_ * this->current_reference_cal_ * 4046 / 324004 / 79931;
}
float BL0940::calculate_energy_reference_() {
// formula: 3600000 * 4046 * RL * R1 * 1000 / (1638.4 * 256) / Vref² / (R1 + R2)
// or: power_reference_ * 3600000 / (1638.4 * 256)
return this->power_reference_cal_ * 3600000 / (1638.4 * 256);
}
float BL0940::calculate_calibration_value_(float state) { return (100 + state) / 100; }
void BL0940::reset_calibration() {
#ifdef USE_NUMBER
if (this->current_calibration_number_ != nullptr && this->current_cal_ != 1) {
this->current_calibration_number_->make_call().set_value(0).perform();
}
if (this->voltage_calibration_number_ != nullptr && this->voltage_cal_ != 1) {
this->voltage_calibration_number_->make_call().set_value(0).perform();
}
if (this->power_calibration_number_ != nullptr && this->power_cal_ != 1) {
this->power_calibration_number_->make_call().set_value(0).perform();
}
if (this->energy_calibration_number_ != nullptr && this->energy_cal_ != 1) {
this->energy_calibration_number_->make_call().set_value(0).perform();
}
#endif
ESP_LOGD(TAG, "external calibration values restored to initial state");
}
void BL0940::current_calibration_callback_(float state) {
this->current_cal_ = this->calculate_calibration_value_(state);
ESP_LOGV(TAG, "update current calibration state: %f", this->current_cal_);
this->recalibrate_();
}
void BL0940::voltage_calibration_callback_(float state) {
this->voltage_cal_ = this->calculate_calibration_value_(state);
ESP_LOGV(TAG, "update voltage calibration state: %f", this->voltage_cal_);
this->recalibrate_();
}
void BL0940::power_calibration_callback_(float state) {
this->power_cal_ = this->calculate_calibration_value_(state);
ESP_LOGV(TAG, "update power calibration state: %f", this->power_cal_);
this->recalibrate_();
}
void BL0940::energy_calibration_callback_(float state) {
this->energy_cal_ = this->calculate_calibration_value_(state);
ESP_LOGV(TAG, "update energy calibration state: %f", this->energy_cal_);
this->recalibrate_();
}
void BL0940::recalibrate_() {
ESP_LOGV(TAG, "Recalibrating reference values");
this->voltage_reference_cal_ = this->voltage_reference_ / this->voltage_cal_;
this->current_reference_cal_ = this->current_reference_ / this->current_cal_;
if (this->voltage_cal_ != 1 || this->current_cal_ != 1) {
this->power_reference_ = this->calculate_power_reference_();
}
this->power_reference_cal_ = this->power_reference_ / this->power_cal_;
if (this->voltage_cal_ != 1 || this->current_cal_ != 1 || this->power_cal_ != 1) {
this->energy_reference_ = this->calculate_energy_reference_();
}
this->energy_reference_cal_ = this->energy_reference_ / this->energy_cal_;
ESP_LOGD(TAG,
"Recalibrated reference values:\n"
"Voltage: %f\n, Current: %f\n, Power: %f\n, Energy: %f\n",
this->voltage_reference_cal_, this->current_reference_cal_, this->power_reference_cal_,
this->energy_reference_cal_);
}
float BL0940::update_temp_(sensor::Sensor *sensor, uint16_le_t temperature) const {
auto tb = (float) temperature;
float converted_temp = ((float) 170 / 448) * (tb / 2 - 32) - 45;
if (sensor != nullptr) {
if (sensor->has_state() && std::abs(converted_temp - sensor->get_state()) > max_temperature_diff_) {
@@ -87,33 +201,40 @@ float BL0940::update_temp_(sensor::Sensor *sensor, ube16_t temperature) const {
return converted_temp;
}
void BL0940::received_package_(const DataPacket *data) const {
void BL0940::received_package_(DataPacket *data) {
// Bad header
if (data->frame_header != BL0940_PACKET_HEADER) {
ESP_LOGI(TAG, "Invalid data. Header mismatch: %d", data->frame_header);
return;
}
float v_rms = (float) to_uint32_t(data->v_rms) / voltage_reference_;
float i_rms = (float) to_uint32_t(data->i_rms) / current_reference_;
float watt = (float) to_int32_t(data->watt) / power_reference_;
uint32_t cf_cnt = to_uint32_t(data->cf_cnt);
float total_energy_consumption = (float) cf_cnt / energy_reference_;
// cf_cnt is only 24 bits, so track overflows
uint32_t cf_cnt = (uint24_t) data->cf_cnt;
cf_cnt |= this->prev_cf_cnt_ & 0xff000000;
if (cf_cnt < this->prev_cf_cnt_) {
cf_cnt += 0x1000000;
}
this->prev_cf_cnt_ = cf_cnt;
float tps1 = update_temp_(internal_temperature_sensor_, data->tps1);
float tps2 = update_temp_(external_temperature_sensor_, data->tps2);
float v_rms = (uint24_t) data->v_rms / this->voltage_reference_cal_;
float i_rms = (uint24_t) data->i_rms / this->current_reference_cal_;
float watt = (int24_t) data->watt / this->power_reference_cal_;
float total_energy_consumption = cf_cnt / this->energy_reference_cal_;
if (voltage_sensor_ != nullptr) {
voltage_sensor_->publish_state(v_rms);
float tps1 = update_temp_(this->internal_temperature_sensor_, data->tps1);
float tps2 = update_temp_(this->external_temperature_sensor_, data->tps2);
if (this->voltage_sensor_ != nullptr) {
this->voltage_sensor_->publish_state(v_rms);
}
if (current_sensor_ != nullptr) {
current_sensor_->publish_state(i_rms);
if (this->current_sensor_ != nullptr) {
this->current_sensor_->publish_state(i_rms);
}
if (power_sensor_ != nullptr) {
power_sensor_->publish_state(watt);
if (this->power_sensor_ != nullptr) {
this->power_sensor_->publish_state(watt);
}
if (energy_sensor_ != nullptr) {
energy_sensor_->publish_state(total_energy_consumption);
if (this->energy_sensor_ != nullptr) {
this->energy_sensor_->publish_state(total_energy_consumption);
}
ESP_LOGV(TAG, "BL0940: U %fV, I %fA, P %fW, Cnt %" PRId32 ", ∫P %fkWh, T1 %f°C, T2 %f°C", v_rms, i_rms, watt, cf_cnt,
@@ -121,7 +242,27 @@ void BL0940::received_package_(const DataPacket *data) const {
}
void BL0940::dump_config() { // NOLINT(readability-function-cognitive-complexity)
ESP_LOGCONFIG(TAG, "BL0940:");
ESP_LOGCONFIG(TAG,
"BL0940:\n"
" LEGACY MODE: %s\n"
" READ CMD: 0x%02X\n"
" WRITE CMD: 0x%02X\n"
" ------------------\n"
" Current reference: %f\n"
" Energy reference: %f\n"
" Power reference: %f\n"
" Voltage reference: %f\n",
TRUEFALSE(this->legacy_mode_enabled_), this->read_command_, this->write_command_,
this->current_reference_, this->energy_reference_, this->power_reference_, this->voltage_reference_);
#ifdef USE_NUMBER
ESP_LOGCONFIG(TAG,
"BL0940:\n"
" Current calibration: %f\n"
" Energy calibration: %f\n"
" Power calibration: %f\n"
" Voltage calibration: %f\n",
this->current_cal_, this->energy_cal_, this->power_cal_, this->voltage_cal_);
#endif
LOG_SENSOR("", "Voltage", this->voltage_sensor_);
LOG_SENSOR("", "Current", this->current_sensor_);
LOG_SENSOR("", "Power", this->power_sensor_);
@@ -130,9 +271,5 @@ void BL0940::dump_config() { // NOLINT(readability-function-cognitive-complexit
LOG_SENSOR("", "External temperature", this->external_temperature_sensor_);
}
uint32_t BL0940::to_uint32_t(ube24_t input) { return input.h << 16 | input.m << 8 | input.l; }
int32_t BL0940::to_int32_t(sbe24_t input) { return input.h << 16 | input.m << 8 | input.l; }
} // namespace bl0940
} // namespace esphome

185
esphome/components/bl0940/bl0940.h
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@@ -1,66 +1,48 @@
#pragma once
#include "esphome/core/component.h"
#include "esphome/components/uart/uart.h"
#include "esphome/core/datatypes.h"
#include "esphome/core/defines.h"
#ifdef USE_BUTTON
#include "esphome/components/button/button.h"
#endif
#ifdef USE_NUMBER
#include "esphome/components/number/number.h"
#endif
#include "esphome/components/sensor/sensor.h"
#include "esphome/components/uart/uart.h"
namespace esphome {
namespace bl0940 {
static const float BL0940_PREF = 1430;
static const float BL0940_UREF = 33000;
static const float BL0940_IREF = 275000; // 2750 from tasmota. Seems to generate values 100 times too high
// Measured to 297J per click according to power consumption of 5 minutes
// Converted to kWh (3.6MJ per kwH). Used to be 256 * 1638.4
static const float BL0940_EREF = 3.6e6 / 297;
struct ube24_t { // NOLINT(readability-identifier-naming,altera-struct-pack-align)
uint8_t l;
uint8_t m;
uint8_t h;
} __attribute__((packed));
struct ube16_t { // NOLINT(readability-identifier-naming,altera-struct-pack-align)
uint8_t l;
uint8_t h;
} __attribute__((packed));
struct sbe24_t { // NOLINT(readability-identifier-naming,altera-struct-pack-align)
uint8_t l;
uint8_t m;
int8_t h;
} __attribute__((packed));
// Caveat: All these values are big endian (low - middle - high)
union DataPacket { // NOLINT(altera-struct-pack-align)
uint8_t raw[35];
struct {
uint8_t frame_header; // value of 0x58 according to docs. 0x55 according to Tasmota real world tests. Reality wins.
ube24_t i_fast_rms; // 0x00
ube24_t i_rms; // 0x04
ube24_t RESERVED0; // reserved
ube24_t v_rms; // 0x06
ube24_t RESERVED1; // reserved
sbe24_t watt; // 0x08
ube24_t RESERVED2; // reserved
ube24_t cf_cnt; // 0x0A
ube24_t RESERVED3; // reserved
ube16_t tps1; // 0x0c
uint8_t RESERVED4; // value of 0x00
ube16_t tps2; // 0x0c
uint8_t RESERVED5; // value of 0x00
uint8_t checksum; // checksum
};
struct DataPacket {
uint8_t frame_header; // Packet header (0x58 in EN docs, 0x55 in CN docs and Tasmota tests)
uint24_le_t i_fast_rms; // Fast RMS current
uint24_le_t i_rms; // RMS current
uint24_t RESERVED0; // Reserved
uint24_le_t v_rms; // RMS voltage
uint24_t RESERVED1; // Reserved
int24_le_t watt; // Active power (can be negative for bidirectional measurement)
uint24_t RESERVED2; // Reserved
uint24_le_t cf_cnt; // Energy pulse count
uint24_t RESERVED3; // Reserved
uint16_le_t tps1; // Internal temperature sensor 1
uint8_t RESERVED4; // Reserved (should be 0x00)
uint16_le_t tps2; // Internal temperature sensor 2
uint8_t RESERVED5; // Reserved (should be 0x00)
uint8_t checksum; // Packet checksum
} __attribute__((packed));
class BL0940 : public PollingComponent, public uart::UARTDevice {
public:
// Sensor setters
void set_voltage_sensor(sensor::Sensor *voltage_sensor) { voltage_sensor_ = voltage_sensor; }
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; }
// Temperature sensor setters
void set_internal_temperature_sensor(sensor::Sensor *internal_temperature_sensor) {
internal_temperature_sensor_ = internal_temperature_sensor;
}
@@ -68,42 +50,105 @@ class BL0940 : public PollingComponent, public uart::UARTDevice {
external_temperature_sensor_ = external_temperature_sensor;
}
void loop() override;
// Configuration setters
void set_legacy_mode(bool enable) { this->legacy_mode_enabled_ = enable; }
void set_read_command(uint8_t read_command) { this->read_command_ = read_command; }
void set_write_command(uint8_t write_command) { this->write_command_ = write_command; }
// Reference value setters (used for calibration and conversion)
void set_current_reference(float current_ref) { this->current_reference_ = current_ref; }
void set_energy_reference(float energy_ref) { this->energy_reference_ = energy_ref; }
void set_power_reference(float power_ref) { this->power_reference_ = power_ref; }
void set_voltage_reference(float voltage_ref) { this->voltage_reference_ = voltage_ref; }
#ifdef USE_NUMBER
// Calibration number setters (for Home Assistant number entities)
void set_current_calibration_number(number::Number *num) { this->current_calibration_number_ = num; }
void set_voltage_calibration_number(number::Number *num) { this->voltage_calibration_number_ = num; }
void set_power_calibration_number(number::Number *num) { this->power_calibration_number_ = num; }
void set_energy_calibration_number(number::Number *num) { this->energy_calibration_number_ = num; }
#endif
#ifdef USE_BUTTON
// Resets all calibration values to defaults (can be triggered by a button)
void reset_calibration();
#endif
// Core component methods
void loop() override;
void update() override;
void setup() override;
void dump_config() override;
protected:
sensor::Sensor *voltage_sensor_{nullptr};
sensor::Sensor *current_sensor_{nullptr};
// NB This may be negative as the circuits is seemingly able to measure
// power in both directions
sensor::Sensor *power_sensor_{nullptr};
sensor::Sensor *energy_sensor_{nullptr};
sensor::Sensor *internal_temperature_sensor_{nullptr};
sensor::Sensor *external_temperature_sensor_{nullptr};
// --- Sensor pointers ---
sensor::Sensor *voltage_sensor_{nullptr}; // Voltage sensor
sensor::Sensor *current_sensor_{nullptr}; // Current sensor
sensor::Sensor *power_sensor_{nullptr}; // Power sensor (can be negative for bidirectional)
sensor::Sensor *energy_sensor_{nullptr}; // Energy sensor
sensor::Sensor *internal_temperature_sensor_{nullptr}; // Internal temperature sensor
sensor::Sensor *external_temperature_sensor_{nullptr}; // External temperature sensor
// Max difference between two measurements of the temperature. Used to avoid noise.
float max_temperature_diff_{0};
// Divide by this to turn into Watt
float power_reference_ = BL0940_PREF;
// Divide by this to turn into Volt
float voltage_reference_ = BL0940_UREF;
// Divide by this to turn into Ampere
float current_reference_ = BL0940_IREF;
// Divide by this to turn into kWh
float energy_reference_ = BL0940_EREF;
#ifdef USE_NUMBER
// --- Calibration number entities (for dynamic calibration via HA UI) ---
number::Number *voltage_calibration_number_{nullptr};
number::Number *current_calibration_number_{nullptr};
number::Number *power_calibration_number_{nullptr};
number::Number *energy_calibration_number_{nullptr};
#endif
float update_temp_(sensor::Sensor *sensor, ube16_t packed_temperature) const;
// --- Internal state ---
uint32_t prev_cf_cnt_ = 0; // Previous energy pulse count (for energy calculation)
float max_temperature_diff_{0}; // Max allowed temperature difference between two measurements (noise filter)
static uint32_t to_uint32_t(ube24_t input);
// --- Reference values for conversion ---
float power_reference_; // Divider for raw power to get Watts
float power_reference_cal_; // Calibrated power reference
float voltage_reference_; // Divider for raw voltage to get Volts
float voltage_reference_cal_; // Calibrated voltage reference
float current_reference_; // Divider for raw current to get Amperes
float current_reference_cal_; // Calibrated current reference
float energy_reference_; // Divider for raw energy to get kWh
float energy_reference_cal_; // Calibrated energy reference
static int32_t to_int32_t(sbe24_t input);
// --- Home Assistant calibration values (multipliers, default 1) ---
float current_cal_{1};
float voltage_cal_{1};
float power_cal_{1};
float energy_cal_{1};
static bool validate_checksum(const DataPacket *data);
// --- Protocol commands ---
uint8_t read_command_;
uint8_t write_command_;
void received_package_(const DataPacket *data) const;
// --- Mode flags ---
bool legacy_mode_enabled_ = true;
// --- Methods ---
// Converts packed temperature value to float and updates the sensor
float update_temp_(sensor::Sensor *sensor, uint16_le_t packed_temperature) const;
// Validates the checksum of a received data packet
bool validate_checksum_(DataPacket *data);
// Handles a received data packet
void received_package_(DataPacket *data);
// Calculates reference values for calibration and conversion
float calculate_energy_reference_();
float calculate_power_reference_();
float calculate_calibration_value_(float state);
// Calibration update callbacks (used with number entities)
void current_calibration_callback_(float state);
void voltage_calibration_callback_(float state);
void power_calibration_callback_(float state);
void energy_calibration_callback_(float state);
void reset_calibration_callback_();
// Recalculates all reference values after calibration changes
void recalibrate_();
};
} // namespace bl0940
} // namespace esphome

27
esphome/components/bl0940/button/__init__.py Normal file
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@@ -0,0 +1,27 @@
import esphome.codegen as cg
from esphome.components import button
import esphome.config_validation as cv
from esphome.const import ENTITY_CATEGORY_CONFIG, ICON_RESTART
from .. import CONF_BL0940_ID, bl0940_ns
from ..sensor import BL0940
CalibrationResetButton = bl0940_ns.class_(
"CalibrationResetButton", button.Button, cg.Component
)
CONFIG_SCHEMA = cv.All(
button.button_schema(
CalibrationResetButton,
entity_category=ENTITY_CATEGORY_CONFIG,
icon=ICON_RESTART,
)
.extend({cv.GenerateID(CONF_BL0940_ID): cv.use_id(BL0940)})
.extend(cv.COMPONENT_SCHEMA)
)
async def to_code(config):
var = await button.new_button(config)
await cg.register_component(var, config)
await cg.register_parented(var, config[CONF_BL0940_ID])

20
esphome/components/bl0940/button/calibration_reset_button.cpp Normal file
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@@ -0,0 +1,20 @@
#include "calibration_reset_button.h"
#include "../bl0940.h"
#include "esphome/core/hal.h"
#include "esphome/core/log.h"
#include "esphome/core/application.h"
namespace esphome {
namespace bl0940 {
static const char *const TAG = "bl0940.button.calibration_reset";
void CalibrationResetButton::dump_config() { LOG_BUTTON("", "Calibration Reset Button", this); }
void CalibrationResetButton::press_action() {
ESP_LOGI(TAG, "Resetting calibration defaults...");
this->parent_->reset_calibration();
}
} // namespace bl0940
} // namespace esphome

19
esphome/components/bl0940/button/calibration_reset_button.h Normal file
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@@ -0,0 +1,19 @@
#pragma once
#include "esphome/core/component.h"
#include "esphome/components/button/button.h"
namespace esphome {
namespace bl0940 {
class BL0940; // Forward declaration of BL0940 class
class CalibrationResetButton : public button::Button, public Component, public Parented<BL0940> {
public:
void dump_config() override;
void press_action() override;
};
} // namespace bl0940
} // namespace esphome

94
esphome/components/bl0940/number/__init__.py Normal file
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@@ -0,0 +1,94 @@
import esphome.codegen as cg
from esphome.components import number
import esphome.config_validation as cv
from esphome.const import (
CONF_MAX_VALUE,
CONF_MIN_VALUE,
CONF_MODE,
CONF_RESTORE_VALUE,
CONF_STEP,
ENTITY_CATEGORY_CONFIG,
UNIT_PERCENT,
)
from .. import CONF_BL0940_ID, bl0940_ns
from ..sensor import BL0940
# Define calibration types
CONF_CURRENT_CALIBRATION = "current_calibration"
CONF_VOLTAGE_CALIBRATION = "voltage_calibration"
CONF_POWER_CALIBRATION = "power_calibration"
CONF_ENERGY_CALIBRATION = "energy_calibration"
BL0940Number = bl0940_ns.class_("BL0940Number")
CalibrationNumber = bl0940_ns.class_(
"CalibrationNumber", number.Number, cg.PollingComponent
)
def validate_min_max(config):
if config[CONF_MAX_VALUE] <= config[CONF_MIN_VALUE]:
raise cv.Invalid("max_value must be greater than min_value")
return config
CALIBRATION_SCHEMA = cv.All(
number.number_schema(
CalibrationNumber,
entity_category=ENTITY_CATEGORY_CONFIG,
unit_of_measurement=UNIT_PERCENT,
)
.extend(
{
cv.Optional(CONF_MODE, default="BOX"): cv.enum(number.NUMBER_MODES),
cv.Optional(CONF_MAX_VALUE, default=10): cv.All(
cv.float_, cv.Range(max=50)
),
cv.Optional(CONF_MIN_VALUE, default=-10): cv.All(
cv.float_, cv.Range(min=-50)
),
cv.Optional(CONF_STEP, default=0.1): cv.positive_float,
cv.Optional(CONF_RESTORE_VALUE): cv.boolean,
}
)
.extend(cv.COMPONENT_SCHEMA),
validate_min_max,
)
# Configuration schema for BL0940 numbers
CONFIG_SCHEMA = cv.Schema(
{
cv.GenerateID(): cv.declare_id(BL0940Number),
cv.GenerateID(CONF_BL0940_ID): cv.use_id(BL0940),
cv.Optional(CONF_CURRENT_CALIBRATION): CALIBRATION_SCHEMA,
cv.Optional(CONF_VOLTAGE_CALIBRATION): CALIBRATION_SCHEMA,
cv.Optional(CONF_POWER_CALIBRATION): CALIBRATION_SCHEMA,
cv.Optional(CONF_ENERGY_CALIBRATION): CALIBRATION_SCHEMA,
}
)
async def to_code(config):
# Get the BL0940 component instance
bl0940 = await cg.get_variable(config[CONF_BL0940_ID])
# Process all calibration types
for cal_type, setter_method in [
(CONF_CURRENT_CALIBRATION, "set_current_calibration_number"),
(CONF_VOLTAGE_CALIBRATION, "set_voltage_calibration_number"),
(CONF_POWER_CALIBRATION, "set_power_calibration_number"),
(CONF_ENERGY_CALIBRATION, "set_energy_calibration_number"),
]:
if conf := config.get(cal_type):
var = await number.new_number(
conf,
min_value=conf.get(CONF_MIN_VALUE),
max_value=conf.get(CONF_MAX_VALUE),
step=conf.get(CONF_STEP),
)
await cg.register_component(var, conf)
if restore_value := config.get(CONF_RESTORE_VALUE):
cg.add(var.set_restore_value(restore_value))
cg.add(getattr(bl0940, setter_method)(var))

29
esphome/components/bl0940/number/calibration_number.cpp Normal file
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@@ -0,0 +1,29 @@
#include "calibration_number.h"
#include "esphome/core/log.h"
namespace esphome {
namespace bl0940 {
static const char *const TAG = "bl0940.number";
void CalibrationNumber::setup() {
float value = 0.0f;
if (this->restore_value_) {
this->pref_ = global_preferences->make_preference<float>(this->get_object_id_hash());
if (!this->pref_.load(&value)) {
value = 0.0f;
}
}
this->publish_state(value);
}
void CalibrationNumber::control(float value) {
this->publish_state(value);
if (this->restore_value_)
this->pref_.save(&value);
}
void CalibrationNumber::dump_config() { LOG_NUMBER("", "Calibration Number", this); }
} // namespace bl0940
} // namespace esphome

26
esphome/components/bl0940/number/calibration_number.h Normal file
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@@ -0,0 +1,26 @@
#pragma once
#include "esphome/components/number/number.h"
#include "esphome/core/component.h"
#include "esphome/core/preferences.h"
namespace esphome {
namespace bl0940 {
class CalibrationNumber : public number::Number, public Component {
public:
void setup() override;
void dump_config() override;
float get_setup_priority() const override { return setup_priority::HARDWARE; }
void set_restore_value(bool restore_value) { this->restore_value_ = restore_value; }
protected:
void control(float value) override;
bool restore_value_{true};
ESPPreferenceObject pref_;
};
} // namespace bl0940
} // namespace esphome

153
esphome/components/bl0940/sensor.py
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@@ -8,6 +8,7 @@ from esphome.const import (
CONF_ID,
CONF_INTERNAL_TEMPERATURE,
CONF_POWER,
CONF_REFERENCE_VOLTAGE,
CONF_VOLTAGE,
DEVICE_CLASS_CURRENT,
DEVICE_CLASS_ENERGY,
@@ -23,12 +24,133 @@ from esphome.const import (
UNIT_WATT,
)
from . import bl0940_ns
DEPENDENCIES = ["uart"]
bl0940_ns = cg.esphome_ns.namespace("bl0940")
BL0940 = bl0940_ns.class_("BL0940", cg.PollingComponent, uart.UARTDevice)
CONF_LEGACY_MODE = "legacy_mode"
CONF_READ_COMMAND = "read_command"
CONF_WRITE_COMMAND = "write_command"
CONF_RESISTOR_SHUNT = "resistor_shunt"
CONF_RESISTOR_ONE = "resistor_one"
CONF_RESISTOR_TWO = "resistor_two"
CONF_CURRENT_REFERENCE = "current_reference"
CONF_ENERGY_REFERENCE = "energy_reference"
CONF_POWER_REFERENCE = "power_reference"
CONF_VOLTAGE_REFERENCE = "voltage_reference"
DEFAULT_BL0940_READ_COMMAND = 0x58
DEFAULT_BL0940_WRITE_COMMAND = 0xA1
# Values according to BL0940 application note:
# https://www.belling.com.cn/media/file_object/bel_product/BL0940/guide/BL0940_APPNote_TSSOP14_V1.04_EN.pdf
DEFAULT_BL0940_VREF = 1.218 # Vref = 1.218
DEFAULT_BL0940_RL = 1 # RL = 1 mΩ
DEFAULT_BL0940_R1 = 0.51 # R1 = 0.51 kΩ
DEFAULT_BL0940_R2 = 1950 # R2 = 5 x 390 kΩ -> 1950 kΩ
# ----------------------------------------------------
# values from initial implementation
DEFAULT_BL0940_LEGACY_READ_COMMAND = 0x50
DEFAULT_BL0940_LEGACY_WRITE_COMMAND = 0xA0
DEFAULT_BL0940_LEGACY_UREF = 33000
DEFAULT_BL0940_LEGACY_IREF = 275000
DEFAULT_BL0940_LEGACY_PREF = 1430
# Measured to 297J per click according to power consumption of 5 minutes
# Converted to kWh (3.6MJ per kwH). Used to be 256 * 1638.4
DEFAULT_BL0940_LEGACY_EREF = 3.6e6 / 297
# ----------------------------------------------------
# methods to calculate voltage and current reference values
def calculate_voltage_reference(vref, r_one, r_two):
# formula: 79931 / Vref * (R1 * 1000) / (R1 + R2)
return 79931 / vref * (r_one * 1000) / (r_one + r_two)
def calculate_current_reference(vref, r_shunt):
# formula: 324004 * RL / Vref
return 324004 * r_shunt / vref
def calculate_power_reference(voltage_reference, current_reference):
# calculate power reference based on voltage and current reference
return voltage_reference * current_reference * 4046 / 324004 / 79931
def calculate_energy_reference(power_reference):
# formula: power_reference * 3600000 / (1638.4 * 256)
return power_reference * 3600000 / (1638.4 * 256)
def validate_legacy_mode(config):
# Only allow schematic calibration options if legacy_mode is False
if config.get(CONF_LEGACY_MODE, True):
forbidden = [
CONF_REFERENCE_VOLTAGE,
CONF_RESISTOR_SHUNT,
CONF_RESISTOR_ONE,
CONF_RESISTOR_TWO,
]
for key in forbidden:
if key in config:
raise cv.Invalid(
f"Option '{key}' is only allowed when legacy_mode: false"
)
return config
def set_command_defaults(config):
# Set defaults for read_command and write_command based on legacy_mode
legacy = config.get(CONF_LEGACY_MODE, True)
if legacy:
config.setdefault(CONF_READ_COMMAND, DEFAULT_BL0940_LEGACY_READ_COMMAND)
config.setdefault(CONF_WRITE_COMMAND, DEFAULT_BL0940_LEGACY_WRITE_COMMAND)
else:
config.setdefault(CONF_READ_COMMAND, DEFAULT_BL0940_READ_COMMAND)
config.setdefault(CONF_WRITE_COMMAND, DEFAULT_BL0940_WRITE_COMMAND)
return config
def set_reference_values(config):
# Set default reference values based on legacy_mode
if config.get(CONF_LEGACY_MODE, True):
config.setdefault(CONF_VOLTAGE_REFERENCE, DEFAULT_BL0940_LEGACY_UREF)
config.setdefault(CONF_CURRENT_REFERENCE, DEFAULT_BL0940_LEGACY_IREF)
config.setdefault(CONF_POWER_REFERENCE, DEFAULT_BL0940_LEGACY_PREF)
config.setdefault(CONF_ENERGY_REFERENCE, DEFAULT_BL0940_LEGACY_PREF)
else:
vref = config.get(CONF_VOLTAGE_REFERENCE, DEFAULT_BL0940_VREF)
r_one = config.get(CONF_RESISTOR_ONE, DEFAULT_BL0940_R1)
r_two = config.get(CONF_RESISTOR_TWO, DEFAULT_BL0940_R2)
r_shunt = config.get(CONF_RESISTOR_SHUNT, DEFAULT_BL0940_RL)
config.setdefault(
CONF_VOLTAGE_REFERENCE, calculate_voltage_reference(vref, r_one, r_two)
)
config.setdefault(
CONF_CURRENT_REFERENCE, calculate_current_reference(vref, r_shunt)
)
config.setdefault(
CONF_POWER_REFERENCE,
calculate_power_reference(
config.get(CONF_VOLTAGE_REFERENCE), config.get(CONF_CURRENT_REFERENCE)
),
)
config.setdefault(
CONF_ENERGY_REFERENCE,
calculate_energy_reference(config.get(CONF_POWER_REFERENCE)),
)
return config
CONFIG_SCHEMA = (
cv.Schema(
{
@@ -69,10 +191,24 @@ CONFIG_SCHEMA = (
device_class=DEVICE_CLASS_TEMPERATURE,
state_class=STATE_CLASS_MEASUREMENT,
),
cv.Optional(CONF_LEGACY_MODE, default=True): cv.boolean,
cv.Optional(CONF_READ_COMMAND): cv.hex_uint8_t,
cv.Optional(CONF_WRITE_COMMAND): cv.hex_uint8_t,
cv.Optional(CONF_REFERENCE_VOLTAGE): cv.float_,
cv.Optional(CONF_RESISTOR_SHUNT): cv.float_,
cv.Optional(CONF_RESISTOR_ONE): cv.float_,
cv.Optional(CONF_RESISTOR_TWO): cv.float_,
cv.Optional(CONF_CURRENT_REFERENCE): cv.float_,
cv.Optional(CONF_ENERGY_REFERENCE): cv.float_,
cv.Optional(CONF_POWER_REFERENCE): cv.float_,
cv.Optional(CONF_VOLTAGE_REFERENCE): cv.float_,
}
)
.extend(cv.polling_component_schema("60s"))
.extend(uart.UART_DEVICE_SCHEMA)
.add_extra(validate_legacy_mode)
.add_extra(set_command_defaults)
.add_extra(set_reference_values)
)
@@ -99,3 +235,16 @@ async def to_code(config):
if external_temperature_config := config.get(CONF_EXTERNAL_TEMPERATURE):
sens = await sensor.new_sensor(external_temperature_config)
cg.add(var.set_external_temperature_sensor(sens))
# enable legacy mode
cg.add(var.set_legacy_mode(config.get(CONF_LEGACY_MODE)))
# Set bl0940 commands after validator has determined which defaults to use if not set
cg.add(var.set_read_command(config.get(CONF_READ_COMMAND)))
cg.add(var.set_write_command(config.get(CONF_WRITE_COMMAND)))
# Set reference values after validator has set the values either from defaults or calculated
cg.add(var.set_current_reference(config.get(CONF_CURRENT_REFERENCE)))
cg.add(var.set_voltage_reference(config.get(CONF_VOLTAGE_REFERENCE)))
cg.add(var.set_power_reference(config.get(CONF_POWER_REFERENCE)))
cg.add(var.set_energy_reference(config.get(CONF_ENERGY_REFERENCE)))

21
tests/components/bl0940/common.yaml
View File

@@ -4,8 +4,14 @@ uart:
rx_pin: ${rx_pin}
baud_rate: 9600
button:
- platform: bl0940
bl0940_id: test_id
name: Cal Reset
sensor:
- platform: bl0940
id: test_id
voltage:
name: BL0940 Voltage
current:
@@ -18,3 +24,18 @@ sensor:
name: BL0940 Internal temperature
external_temperature:
name: BL0940 External temperature
number:
- platform: bl0940
id: bl0940_number_id
bl0940_id: test_id
current_calibration:
name: Cal Current
min_value: -5
max_value: 5
voltage_calibration:
name: Cal Voltage
step: 0.01
power_calibration:
name: Cal Power
disabled_by_default: true