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78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/core/datatypes.h"
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#include "esphome/components/uart/uart.h"
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#include "esphome/components/sensor/sensor.h"
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namespace esphome {
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namespace bl0942 {
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static const float BL0942_PREF = 596; // taken from tasmota
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static const float BL0942_UREF = 15873.35944299; // should be 73989/1.218
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static const float BL0942_IREF = 251213.46469622; // 305978/1.218
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static const float BL0942_EREF = 3304.61127328; // Measured
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struct DataPacket {
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uint8_t frame_header;
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uint24_le_t i_rms;
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uint24_le_t v_rms;
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uint24_le_t i_fast_rms;
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int24_le_t watt;
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uint24_le_t cf_cnt;
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uint16_le_t frequency;
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uint8_t reserved1;
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uint8_t status;
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uint8_t reserved2;
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uint8_t reserved3;
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uint8_t checksum;
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} __attribute__((packed));
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enum LineFrequency : uint8_t {
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LINE_FREQUENCY_50HZ = 50,
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LINE_FREQUENCY_60HZ = 60,
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};
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class BL0942 : public PollingComponent, public uart::UARTDevice {
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public:
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void set_voltage_sensor(sensor::Sensor *voltage_sensor) { voltage_sensor_ = voltage_sensor; }
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void set_current_sensor(sensor::Sensor *current_sensor) { current_sensor_ = current_sensor; }
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void set_power_sensor(sensor::Sensor *power_sensor) { power_sensor_ = power_sensor; }
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void set_energy_sensor(sensor::Sensor *energy_sensor) { energy_sensor_ = energy_sensor; }
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void set_frequency_sensor(sensor::Sensor *frequency_sensor) { frequency_sensor_ = frequency_sensor; }
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void set_line_freq(LineFrequency freq) { this->line_freq_ = freq; }
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void set_address(uint8_t address) { this->address_ = address; }
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void loop() override;
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void update() override;
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void setup() override;
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void dump_config() override;
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protected:
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sensor::Sensor *voltage_sensor_{nullptr};
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sensor::Sensor *current_sensor_{nullptr};
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// NB This may be negative as the circuits is seemingly able to measure
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// power in both directions
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sensor::Sensor *power_sensor_{nullptr};
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sensor::Sensor *energy_sensor_{nullptr};
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sensor::Sensor *frequency_sensor_{nullptr};
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// Divide by this to turn into Watt
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float power_reference_ = BL0942_PREF;
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// Divide by this to turn into Volt
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float voltage_reference_ = BL0942_UREF;
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// Divide by this to turn into Ampere
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float current_reference_ = BL0942_IREF;
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// Divide by this to turn into kWh
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float energy_reference_ = BL0942_EREF;
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uint8_t address_ = 0;
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LineFrequency line_freq_ = LINE_FREQUENCY_50HZ;
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bool validate_checksum_(DataPacket *data);
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int read_reg_(uint8_t reg);
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void write_reg_(uint8_t reg, uint32_t val);
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void received_package_(DataPacket *data);
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};
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} // namespace bl0942
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} // namespace esphome
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