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53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/core/esphal.h"
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#include "esphome/components/sensor/sensor.h"
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#include "esphome/components/voltage_sampler/voltage_sampler.h"
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namespace esphome {
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namespace ct_clamp {
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class CTClampSensor : public sensor::Sensor, public PollingComponent {
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public:
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void setup() override;
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void update() override;
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void loop() override;
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void dump_config() override;
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float get_setup_priority() const override {
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// After the base sensor has been initialized
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return setup_priority::DATA - 1.0f;
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}
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void set_sample_duration(uint32_t sample_duration) { sample_duration_ = sample_duration; }
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void set_source(voltage_sampler::VoltageSampler *source) { source_ = source; }
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protected:
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/// High Frequency loop() requester used during sampling phase.
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HighFrequencyLoopRequester high_freq_;
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/// Duration in ms of the sampling phase.
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uint32_t sample_duration_;
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/// The sampling source to read values from.
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voltage_sampler::VoltageSampler *source_;
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/** The DC offset of the circuit.
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*
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* Diagram: https://learn.openenergymonitor.org/electricity-monitoring/ct-sensors/interface-with-arduino
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*
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* This is automatically calculated with an exponential moving average/digital low pass filter.
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*
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* 0.5 is a good initial approximation to start with for most ESP8266 setups.
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*/
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float offset_ = 0.5f;
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float sample_sum_ = 0.0f;
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uint32_t num_samples_ = 0;
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bool is_sampling_ = false;
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/// Calibrate offset value once at boot
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bool is_calibrating_offset_ = false;
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};
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} // namespace ct_clamp
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} // namespace esphome
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