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CSE7766: fix power and current measurements at low loads (#6180)

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Tomek Wasilczyk 2024-02-06 17:12:14 -08:00 committed by GitHub
parent fe789c8beb
commit 0ede4a3095
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GPG key ID: B5690EEEBB952194
1 changed files with 75 additions and 35 deletions
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110
esphome/components/cse7766/cse7766.cpp
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@ -1,6 +1,8 @@
#include "cse7766.h"
#include "esphome/core/log.h"
#include <cinttypes>
#include <iomanip>
#include <sstream>
namespace esphome {
namespace cse7766 {
@ -68,20 +70,26 @@ bool CSE7766Component::check_byte_() {
return true;
}
void CSE7766Component::parse_data_() {
ESP_LOGVV(TAG, "CSE7766 Data: ");
for (uint8_t i = 0; i < 23; i++) {
ESP_LOGVV(TAG, " %u: 0b" BYTE_TO_BINARY_PATTERN " (0x%02X)", i + 1, BYTE_TO_BINARY(this->raw_data_[i]),
this->raw_data_[i]);
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
{
std::stringstream ss;
ss << "Raw data:" << std::hex << std::uppercase << std::setfill('0');
for (uint8_t i = 0; i < 23; i++) {
ss << ' ' << std::setw(2) << static_cast<unsigned>(this->raw_data_[i]);
}
ESP_LOGVV(TAG, "%s", ss.str().c_str());
}
#endif
// Parse header
uint8_t header1 = this->raw_data_[0];
if (header1 == 0xAA) {
ESP_LOGE(TAG, "CSE7766 not calibrated!");
return;
}
bool power_cycle_exceeds_range = false;
if ((header1 & 0xF0) == 0xF0) {
if (header1 & 0xD) {
ESP_LOGE(TAG, "CSE7766 reports abnormal external circuit or chip damage: (0x%02X)", header1);
@ -94,74 +102,106 @@ void CSE7766Component::parse_data_() {
if (header1 & (1 << 0)) {
ESP_LOGE(TAG, " Coefficient storage area is abnormal.");
}
// Datasheet: voltage or current cycle exceeding range means invalid values
return;
}
power_cycle_exceeds_range = header1 & (1 << 1);
}
uint32_t voltage_calib = this->get_24_bit_uint_(2);
// Parse data frame
uint32_t voltage_coeff = this->get_24_bit_uint_(2);
uint32_t voltage_cycle = this->get_24_bit_uint_(5);
uint32_t current_calib = this->get_24_bit_uint_(8);
uint32_t current_coeff = this->get_24_bit_uint_(8);
uint32_t current_cycle = this->get_24_bit_uint_(11);
uint32_t power_calib = this->get_24_bit_uint_(14);
uint32_t power_coeff = this->get_24_bit_uint_(14);
uint32_t power_cycle = this->get_24_bit_uint_(17);
uint8_t adj = this->raw_data_[20];
uint32_t cf_pulses = (this->raw_data_[21] << 8) + this->raw_data_[22];
bool have_power = adj & 0x10;
bool have_current = adj & 0x20;
bool have_voltage = adj & 0x40;
float voltage = 0.0f;
if (have_voltage) {
// voltage cycle of serial port outputted is a complete cycle;
float voltage = voltage_calib / float(voltage_cycle);
if (this->voltage_sensor_ != nullptr)
voltage = voltage_coeff / float(voltage_cycle);
if (this->voltage_sensor_ != nullptr) {
this->voltage_sensor_->publish_state(voltage);
}
}
bool have_power = adj & 0x10;
float power = 0.0f;
if (have_power) {
// power cycle of serial port outputted is a complete cycle;
// According to the user manual, power cycle exceeding range means the measured power is 0
if (!power_cycle_exceeds_range) {
power = power_calib / float(power_cycle);
float energy = 0.0f;
if (power_cycle_exceeds_range) {
// Datasheet: power cycle exceeding range means active power is 0
if (this->power_sensor_ != nullptr) {
this->power_sensor_->publish_state(0.0f);
}
if (this->power_sensor_ != nullptr)
} else if (have_power) {
power = power_coeff / float(power_cycle);
if (this->power_sensor_ != nullptr) {
this->power_sensor_->publish_state(power);
}
// Add CF pulses to the total energy only if we have Power coefficient to multiply by
uint32_t difference;
if (this->cf_pulses_last_ == 0) {
this->cf_pulses_last_ = cf_pulses;
}
uint32_t cf_diff;
if (cf_pulses < this->cf_pulses_last_) {
difference = cf_pulses + (0x10000 - this->cf_pulses_last_);
cf_diff = cf_pulses + (0x10000 - this->cf_pulses_last_);
} else {
difference = cf_pulses - this->cf_pulses_last_;
cf_diff = cf_pulses - this->cf_pulses_last_;
}
this->cf_pulses_last_ = cf_pulses;
this->energy_total_ += difference * float(power_calib) / 1000000.0f / 3600.0f;
energy = cf_diff * float(power_coeff) / 1000000.0f / 3600.0f;
this->energy_total_ += energy;
if (this->energy_sensor_ != nullptr)
this->energy_sensor_->publish_state(this->energy_total_);
} else if ((this->energy_sensor_ != nullptr) && !this->energy_sensor_->has_state()) {
this->energy_sensor_->publish_state(0);
}
if (adj & 0x20) {
// indicates current cycle of serial port outputted is a complete cycle;
float current = 0.0f;
if (have_voltage && !have_power) {
// Testing has shown that when we have voltage and current but not power, that means the power is 0.
// We report a power of 0, which in turn means we should report a current of 0.
if (this->power_sensor_ != nullptr)
this->power_sensor_->publish_state(0);
} else if (power != 0.0f) {
current = current_calib / float(current_cycle);
float current = 0.0f;
float calculated_current = 0.0f;
if (have_current) {
// Assumption: if we don't have power measurement, then current is likely below 50mA
if (have_power && voltage > 1.0f) {
calculated_current = power / voltage;
}
if (this->current_sensor_ != nullptr)
// Datasheet: minimum measured current is 50mA
if (calculated_current > 0.05f) {
current = current_coeff / float(current_cycle);
}
if (this->current_sensor_ != nullptr) {
this->current_sensor_->publish_state(current);
}
}
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
{
std::stringstream ss;
ss << "Parsed:";
if (have_voltage) {
ss << " V=" << voltage << "V";
}
if (have_current) {
ss << " I=" << current * 1000.0f << "mA (~" << calculated_current * 1000.0f << "mA)";
}
if (have_power) {
ss << " P=" << power << "W";
}
if (energy != 0.0f) {
ss << " E=" << energy << "kWh (" << cf_pulses << ")";
}
ESP_LOGVV(TAG, "%s", ss.str().c_str());
}
#endif
}
uint32_t CSE7766Component::get_24_bit_uint_(uint8_t start_index) {