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8e75980ebd
* Cleanup dashboard JS * Add vscode * Save start_mark/end_mark * Updates * Updates * Remove need for cv.nameable It's a bit hacky but removes so much bloat from integrations * Add enum helper * Document APIs, and Improvements * Fixes * Fixes * Update PULL_REQUEST_TEMPLATE.md * Updates * Updates * Updates
94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/components/sensor/sensor.h"
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#include "esphome/components/i2c/i2c.h"
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namespace esphome {
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namespace bmp280 {
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/// Internal struct storing the calibration values of an BMP280.
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struct BMP280CalibrationData {
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uint16_t t1; // 0x88 - 0x89
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int16_t t2; // 0x8A - 0x8B
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int16_t t3; // 0x8C - 0x8D
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uint16_t p1; // 0x8E - 0x8F
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int16_t p2; // 0x90 - 0x91
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int16_t p3; // 0x92 - 0x93
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int16_t p4; // 0x94 - 0x95
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int16_t p5; // 0x96 - 0x97
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int16_t p6; // 0x98 - 0x99
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int16_t p7; // 0x9A - 0x9B
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int16_t p8; // 0x9C - 0x9D
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int16_t p9; // 0x9E - 0x9F
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};
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/** Enum listing all Oversampling values for the BMP280.
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*
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* Oversampling basically means measuring a condition multiple times. Higher oversampling
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* values therefore increase the time required to read sensor values but increase accuracy.
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*/
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enum BMP280Oversampling {
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BMP280_OVERSAMPLING_NONE = 0b000,
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BMP280_OVERSAMPLING_1X = 0b001,
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BMP280_OVERSAMPLING_2X = 0b010,
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BMP280_OVERSAMPLING_4X = 0b011,
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BMP280_OVERSAMPLING_8X = 0b100,
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BMP280_OVERSAMPLING_16X = 0b101,
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};
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/** Enum listing all Infinite Impulse Filter values for the BMP280.
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*
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* Higher values increase accuracy, but decrease response time.
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*/
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enum BMP280IIRFilter {
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BMP280_IIR_FILTER_OFF = 0b000,
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BMP280_IIR_FILTER_2X = 0b001,
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BMP280_IIR_FILTER_4X = 0b010,
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BMP280_IIR_FILTER_8X = 0b011,
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BMP280_IIR_FILTER_16X = 0b100,
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};
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/// This class implements support for the BMP280 Temperature+Pressure i2c sensor.
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class BMP280Component : public PollingComponent, public i2c::I2CDevice {
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public:
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void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
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void set_pressure_sensor(sensor::Sensor *pressure_sensor) { pressure_sensor_ = pressure_sensor; }
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/// Set the oversampling value for the temperature sensor. Default is 16x.
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void set_temperature_oversampling(BMP280Oversampling temperature_over_sampling);
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/// Set the oversampling value for the pressure sensor. Default is 16x.
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void set_pressure_oversampling(BMP280Oversampling pressure_over_sampling);
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/// Set the IIR Filter used to increase accuracy, defaults to no IIR Filter.
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void set_iir_filter(BMP280IIRFilter iir_filter);
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void setup() override;
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void dump_config() override;
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float get_setup_priority() const override;
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void update() override;
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protected:
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/// Read the temperature value and store the calculated ambient temperature in t_fine.
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float read_temperature_(int32_t *t_fine);
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/// Read the pressure value in hPa using the provided t_fine value.
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float read_pressure_(int32_t t_fine);
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uint8_t read_u8_(uint8_t a_register);
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uint16_t read_u16_le_(uint8_t a_register);
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int16_t read_s16_le_(uint8_t a_register);
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BMP280CalibrationData calibration_;
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BMP280Oversampling temperature_oversampling_{BMP280_OVERSAMPLING_16X};
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BMP280Oversampling pressure_oversampling_{BMP280_OVERSAMPLING_16X};
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BMP280IIRFilter iir_filter_{BMP280_IIR_FILTER_OFF};
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sensor::Sensor *temperature_sensor_;
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sensor::Sensor *pressure_sensor_;
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enum ErrorCode {
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NONE = 0,
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COMMUNICATION_FAILED,
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WRONG_CHIP_ID,
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} error_code_{NONE};
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};
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} // namespace bmp280
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} // namespace esphome
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