Support for MS8607 PHT (Pressure Humidity Temperature) sensor (#3307)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

CODEOWNERS

@@ -225,6 +225,7 @@ esphome/components/mopeka_pro_check/* @spbrogan
 esphome/components/mopeka_std_check/* @Fabian-Schmidt
 esphome/components/mpl3115a2/* @kbickar
 esphome/components/mpu6886/* @fabaff
+esphome/components/ms8607/* @e28eta
 esphome/components/network/* @esphome/core
 esphome/components/nextion/* @senexcrenshaw
 esphome/components/nextion/binary_sensor/* @senexcrenshaw

esphome/components/ms8607/__init__.py

@@ -0,0 +1 @@
+CODEOWNERS = ["@e28eta"]

esphome/components/ms8607/ms8607.cpp

@@ -0,0 +1,444 @@
+#include "ms8607.h"
+
+#include "esphome/core/hal.h"
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace ms8607 {
+
+/// TAG used for logging calls
+static const char *const TAG = "ms8607";
+
+/// Reset the Pressure/Temperature sensor
+static const uint8_t MS8607_PT_CMD_RESET = 0x1E;
+
+/// Beginning of PROM register addresses. Same for both i2c addresses. Each address has 16 bits of data, and
+/// PROM addresses step by two, so the LSB is always 0
+static const uint8_t MS8607_PROM_START = 0xA0;
+/// Last PROM register address.
+static const uint8_t MS8607_PROM_END = 0xAE;
+/// Number of PROM registers.
+static const uint8_t MS8607_PROM_COUNT = (MS8607_PROM_END - MS8607_PROM_START) >> 1;
+
+/// Reset the Humidity sensor
+static const uint8_t MS8607_CMD_H_RESET = 0xFE;
+/// Read relative humidity, without holding i2c master
+static const uint8_t MS8607_CMD_H_MEASURE_NO_HOLD = 0xF5;
+/// Temperature correction coefficient for Relative Humidity from datasheet
+static const float MS8607_H_TEMP_COEFFICIENT = -0.18;
+
+/// Read the converted analog value, either D1 (pressure) or D2 (temperature)
+static const uint8_t MS8607_CMD_ADC_READ = 0x00;
+
+// TODO: allow OSR to be turned down for speed and/or lower power consumption via configuration.
+// ms8607 supports 6 different settings
+
+/// Request conversion of analog D1 (pressure) with OSR=8192 (highest oversampling ratio). Takes maximum of 17.2ms
+static const uint8_t MS8607_CMD_CONV_D1_OSR_8K = 0x4A;
+/// Request conversion of analog D2 (temperature) with OSR=8192 (highest oversampling ratio). Takes maximum of 17.2ms
+static const uint8_t MS8607_CMD_CONV_D2_OSR_8K = 0x5A;
+
+enum class MS8607Component::ErrorCode {
+  /// Component hasn't failed (yet?)
+  NONE = 0,
+  /// Both the Pressure/Temperature address and the Humidity address failed to reset
+  PTH_RESET_FAILED = 1,
+  /// Asking the Pressure/Temperature sensor to reset failed
+  PT_RESET_FAILED = 2,
+  /// Asking the Humidity sensor to reset failed
+  H_RESET_FAILED = 3,
+  /// Reading the PROM calibration values failed
+  PROM_READ_FAILED = 4,
+  /// The PROM calibration values failed the CRC check
+  PROM_CRC_FAILED = 5,
+};
+
+enum class MS8607Component::SetupStatus {
+  /// This component has not successfully reset the PT & H devices
+  NEEDS_RESET,
+  /// Reset commands succeeded, need to wait >= 15ms to read PROM
+  NEEDS_PROM_READ,
+  /// Successfully read PROM and ready to update sensors
+  SUCCESSFUL,
+};
+
+static uint8_t crc4(uint16_t *buffer, size_t length);
+static uint8_t hsensor_crc_check(uint16_t value);
+
+void MS8607Component::setup() {
+  ESP_LOGCONFIG(TAG, "Setting up MS8607...");
+  this->error_code_ = ErrorCode::NONE;
+  this->setup_status_ = SetupStatus::NEEDS_RESET;
+
+  // I do not know why the device sometimes NACKs the reset command, but
+  // try 3 times in case it's a transitory issue on this boot
+  this->set_retry(
+      "reset", 5, 3,
+      [this](const uint8_t remaining_setup_attempts) {
+        ESP_LOGD(TAG, "Resetting both I2C addresses: 0x%02X, 0x%02X", this->address_,
+                 this->humidity_device_->get_address());
+        // I believe sending the reset command to both addresses is preferable to
+        // skipping humidity if PT fails for some reason.
+        // However, only consider the reset successful if they both ACK
+        bool const pt_successful = this->write_bytes(MS8607_PT_CMD_RESET, nullptr, 0);
+        bool const h_successful = this->humidity_device_->write_bytes(MS8607_CMD_H_RESET, nullptr, 0);
+
+        if (!(pt_successful && h_successful)) {
+          ESP_LOGE(TAG, "Resetting I2C devices failed");
+          if (!pt_successful && !h_successful) {
+            this->error_code_ = ErrorCode::PTH_RESET_FAILED;
+          } else if (!pt_successful) {
+            this->error_code_ = ErrorCode::PT_RESET_FAILED;
+          } else {
+            this->error_code_ = ErrorCode::H_RESET_FAILED;
+          }
+
+          if (remaining_setup_attempts > 0) {
+            this->status_set_error();
+          } else {
+            this->mark_failed();
+          }
+          return RetryResult::RETRY;
+        }
+
+        this->setup_status_ = SetupStatus::NEEDS_PROM_READ;
+        this->error_code_ = ErrorCode::NONE;
+        this->status_clear_error();
+
+        // 15ms delay matches datasheet, Adafruit_MS8607 & SparkFun_PHT_MS8607_Arduino_Library
+        this->set_timeout("prom-read", 15, [this]() {
+          if (this->read_calibration_values_from_prom_()) {
+            this->setup_status_ = SetupStatus::SUCCESSFUL;
+            this->status_clear_error();
+          } else {
+            this->mark_failed();
+            return;
+          }
+        });
+
+        return RetryResult::DONE;
+      },
+      5.0f);  // executes at now, +5ms, +25ms
+}
+
+void MS8607Component::update() {
+  if (this->setup_status_ != SetupStatus::SUCCESSFUL) {
+    // setup is still occurring, either because reset had to retry or due to the 15ms
+    // delay needed between reset & reading the PROM values
+    return;
+  }
+
+  // Updating happens async and sequentially.
+  // Temperature, then pressure, then humidity
+  this->request_read_temperature_();
+}
+
+void MS8607Component::dump_config() {
+  ESP_LOGCONFIG(TAG, "MS8607:");
+  LOG_I2C_DEVICE(this);
+  // LOG_I2C_DEVICE doesn't work for humidity, the `address_` is protected. Log using get_address()
+  ESP_LOGCONFIG(TAG, "  Address: 0x%02X", this->humidity_device_->get_address());
+  if (this->is_failed()) {
+    ESP_LOGE(TAG, "Communication with MS8607 failed.");
+    switch (this->error_code_) {
+      case ErrorCode::PT_RESET_FAILED:
+        ESP_LOGE(TAG, "Temperature/Pressure RESET failed");
+        break;
+      case ErrorCode::H_RESET_FAILED:
+        ESP_LOGE(TAG, "Humidity RESET failed");
+        break;
+      case ErrorCode::PTH_RESET_FAILED:
+        ESP_LOGE(TAG, "Temperature/Pressure && Humidity RESET failed");
+        break;
+      case ErrorCode::PROM_READ_FAILED:
+        ESP_LOGE(TAG, "Reading PROM failed");
+        break;
+      case ErrorCode::PROM_CRC_FAILED:
+        ESP_LOGE(TAG, "PROM values failed CRC");
+        break;
+      case ErrorCode::NONE:
+      default:
+        ESP_LOGE(TAG, "Error reason unknown %u", static_cast<uint8_t>(this->error_code_));
+        break;
+    }
+  }
+  LOG_UPDATE_INTERVAL(this);
+  LOG_SENSOR("  ", "Temperature", this->temperature_sensor_);
+  LOG_SENSOR("  ", "Pressure", this->pressure_sensor_);
+  LOG_SENSOR("  ", "Humidity", this->humidity_sensor_);
+}
+
+bool MS8607Component::read_calibration_values_from_prom_() {
+  ESP_LOGD(TAG, "Reading calibration values from PROM");
+
+  uint16_t buffer[MS8607_PROM_COUNT];
+  bool successful = true;
+
+  for (uint8_t idx = 0; idx < MS8607_PROM_COUNT; ++idx) {
+    uint8_t const address_to_read = MS8607_PROM_START + (idx * 2);
+    successful &= this->read_byte_16(address_to_read, &buffer[idx]);
+  }
+
+  if (!successful) {
+    ESP_LOGE(TAG, "Reading calibration values from PROM failed");
+    this->error_code_ = ErrorCode::PROM_READ_FAILED;
+    return false;
+  }
+
+  ESP_LOGD(TAG, "Checking CRC of calibration values from PROM");
+  uint8_t const expected_crc = (buffer[0] & 0xF000) >> 12;  // first 4 bits
+  buffer[0] &= 0x0FFF;                                      // strip CRC from buffer, in order to run CRC
+  uint8_t const actual_crc = crc4(buffer, MS8607_PROM_COUNT);
+
+  if (expected_crc != actual_crc) {
+    ESP_LOGE(TAG, "Incorrect CRC value. Provided value 0x%01X != calculated value 0x%01X", expected_crc, actual_crc);
+    this->error_code_ = ErrorCode::PROM_CRC_FAILED;
+    return false;
+  }
+
+  this->calibration_values_.pressure_sensitivity = buffer[1];
+  this->calibration_values_.pressure_offset = buffer[2];
+  this->calibration_values_.pressure_sensitivity_temperature_coefficient = buffer[3];
+  this->calibration_values_.pressure_offset_temperature_coefficient = buffer[4];
+  this->calibration_values_.reference_temperature = buffer[5];
+  this->calibration_values_.temperature_coefficient_of_temperature = buffer[6];
+  ESP_LOGD(TAG, "Finished reading calibration values");
+
+  // Skipping reading Humidity PROM, since it doesn't have anything interesting for us
+
+  return true;
+}
+
+/**
+ CRC-4 algorithm from datasheet. It operates on a buffer of 16-bit values, one byte at a time, using a 16-bit
+ value to collect the CRC result into.
+
+ The provided/expected CRC value must already be zeroed out from the buffer.
+ */
+static uint8_t crc4(uint16_t *buffer, size_t length) {
+  uint16_t crc_remainder = 0;
+
+  // algorithm to add a byte into the crc
+  auto apply_crc = [&crc_remainder](uint8_t next) {
+    crc_remainder ^= next;
+    for (uint8_t bit = 8; bit > 0; --bit) {
+      if (crc_remainder & 0x8000) {
+        crc_remainder = (crc_remainder << 1) ^ 0x3000;
+      } else {
+        crc_remainder = (crc_remainder << 1);
+      }
+    }
+  };
+
+  // add all the bytes
+  for (size_t idx = 0; idx < length; ++idx) {
+    for (auto byte : decode_value(buffer[idx])) {
+      apply_crc(byte);
+    }
+  }
+  // For the MS8607 CRC, add a pair of zeros to shift the last byte from `buffer` through
+  apply_crc(0);
+  apply_crc(0);
+
+  return (crc_remainder >> 12) & 0xF;  // only the most significant 4 bits
+}
+
+/**
+ * @brief Calculates CRC value for the provided humidity (+ status bits) value
+ *
+ * CRC-8 check comes from other MS8607 libraries on github. I did not find it in the datasheet,
+ * and it differs from the crc8 implementation that's already part of esphome.
+ *
+ * @param value two byte humidity sensor value read from i2c
+ * @return uint8_t computed crc value
+ */
+static uint8_t hsensor_crc_check(uint16_t value) {
+  uint32_t polynom = 0x988000;  // x^8 + x^5 + x^4 + 1
+  uint32_t msb = 0x800000;
+  uint32_t mask = 0xFF8000;
+  uint32_t result = (uint32_t) value << 8;  // Pad with zeros as specified in spec
+
+  while (msb != 0x80) {
+    // Check if msb of current value is 1 and apply XOR mask
+    if (result & msb) {
+      result = ((result ^ polynom) & mask) | (result & ~mask);
+    }
+
+    // Shift by one
+    msb >>= 1;
+    mask >>= 1;
+    polynom >>= 1;
+  }
+  return result & 0xFF;
+}
+
+void MS8607Component::request_read_temperature_() {
+  // Tell MS8607 to start ADC conversion of temperature sensor
+  if (!this->write_bytes(MS8607_CMD_CONV_D2_OSR_8K, nullptr, 0)) {
+    this->status_set_warning();
+    return;
+  }
+
+  auto f = std::bind(&MS8607Component::read_temperature_, this);
+  // datasheet says 17.2ms max conversion time at OSR 8192
+  this->set_timeout("temperature", 20, f);
+}
+
+void MS8607Component::read_temperature_() {
+  uint8_t bytes[3];  // 24 bits
+  if (!this->read_bytes(MS8607_CMD_ADC_READ, bytes, 3)) {
+    this->status_set_warning();
+    return;
+  }
+
+  const uint32_t d2_raw_temperature = encode_uint32(0, bytes[0], bytes[1], bytes[2]);
+  this->request_read_pressure_(d2_raw_temperature);
+}
+
+void MS8607Component::request_read_pressure_(uint32_t d2_raw_temperature) {
+  if (!this->write_bytes(MS8607_CMD_CONV_D1_OSR_8K, nullptr, 0)) {
+    this->status_set_warning();
+    return;
+  }
+
+  auto f = std::bind(&MS8607Component::read_pressure_, this, d2_raw_temperature);
+  // datasheet says 17.2ms max conversion time at OSR 8192
+  this->set_timeout("pressure", 20, f);
+}
+
+void MS8607Component::read_pressure_(uint32_t d2_raw_temperature) {
+  uint8_t bytes[3];  // 24 bits
+  if (!this->read_bytes(MS8607_CMD_ADC_READ, bytes, 3)) {
+    this->status_set_warning();
+    return;
+  }
+  const uint32_t d1_raw_pressure = encode_uint32(0, bytes[0], bytes[1], bytes[2]);
+  this->calculate_values_(d2_raw_temperature, d1_raw_pressure);
+}
+
+void MS8607Component::request_read_humidity_(float temperature_float) {
+  if (!this->humidity_device_->write_bytes(MS8607_CMD_H_MEASURE_NO_HOLD, nullptr, 0)) {
+    ESP_LOGW(TAG, "Request to measure humidity failed");
+    this->status_set_warning();
+    return;
+  }
+
+  auto f = std::bind(&MS8607Component::read_humidity_, this, temperature_float);
+  // datasheet says 15.89ms max conversion time at OSR 8192
+  this->set_timeout("humidity", 20, f);
+}
+
+void MS8607Component::read_humidity_(float temperature_float) {
+  uint8_t bytes[3];
+  if (!this->humidity_device_->read_bytes_raw(bytes, 3)) {
+    ESP_LOGW(TAG, "Failed to read the measured humidity value");
+    this->status_set_warning();
+    return;
+  }
+
+  // "the measurement is stored into 14 bits. The two remaining LSBs are used for transmitting status information.
+  // Bit1 of the two LSBS must be set to '1'. Bit0 is currently not assigned"
+  uint16_t humidity = encode_uint16(bytes[0], bytes[1]);
+  uint8_t const expected_crc = bytes[2];
+  uint8_t const actual_crc = hsensor_crc_check(humidity);
+  if (expected_crc != actual_crc) {
+    ESP_LOGE(TAG, "Incorrect Humidity CRC value. Provided value 0x%01X != calculated value 0x%01X", expected_crc,
+             actual_crc);
+    this->status_set_warning();
+    return;
+  }
+  if (!(humidity & 0x2)) {
+    // data sheet says Bit1 should always set, but nothing about what happens if it isn't
+    ESP_LOGE(TAG, "Humidity status bit was not set to 1?");
+  }
+  humidity &= ~(0b11);  // strip status & unassigned bits from data
+
+  // map 16 bit humidity value into range [-6%, 118%]
+  float const humidity_partial = double(humidity) / (1 << 16);
+  float const humidity_percentage = lerp(humidity_partial, -6.0, 118.0);
+  float const compensated_humidity_percentage =
+      humidity_percentage + (20 - temperature_float) * MS8607_H_TEMP_COEFFICIENT;
+  ESP_LOGD(TAG, "Compensated for temperature, humidity=%.2f%%", compensated_humidity_percentage);
+
+  if (this->humidity_sensor_ != nullptr) {
+    this->humidity_sensor_->publish_state(compensated_humidity_percentage);
+  }
+  this->status_clear_warning();
+}
+
+void MS8607Component::calculate_values_(uint32_t d2_raw_temperature, uint32_t d1_raw_pressure) {
+  // Perform the first order pressure/temperature calculation
+
+  // d_t: "difference between actual and reference temperature" = D2 - [C5] * 2**8
+  const int32_t d_t = int32_t(d2_raw_temperature) - (int32_t(this->calibration_values_.reference_temperature) << 8);
+  // actual temperature as hundredths of degree celsius in range [-4000, 8500]
+  // 2000 + d_t * [C6] / (2**23)
+  int32_t temperature =
+      2000 + ((int64_t(d_t) * this->calibration_values_.temperature_coefficient_of_temperature) >> 23);
+
+  // offset at actual temperature. [C2] * (2**17) + (d_t * [C4] / (2**6))
+  int64_t pressure_offset = (int64_t(this->calibration_values_.pressure_offset) << 17) +
+                            ((int64_t(d_t) * this->calibration_values_.pressure_offset_temperature_coefficient) >> 6);
+  // sensitivity at actual temperature. [C1] * (2**16) + ([C3] * d_t) / (2**7)
+  int64_t pressure_sensitivity =
+      (int64_t(this->calibration_values_.pressure_sensitivity) << 16) +
+      ((int64_t(d_t) * this->calibration_values_.pressure_sensitivity_temperature_coefficient) >> 7);
+
+  // Perform the second order compensation, for non-linearity over temperature range
+  const int64_t d_t_squared = int64_t(d_t) * d_t;
+  int64_t temperature_2 = 0;
+  int32_t pressure_offset_2 = 0;
+  int32_t pressure_sensitivity_2 = 0;
+  if (temperature < 2000) {
+    // (TEMP - 2000)**2 / 2**4
+    const int32_t low_temperature_adjustment = (temperature - 2000) * (temperature - 2000) >> 4;
+
+    // T2 = 3 * (d_t**2) / 2**33
+    temperature_2 = (3 * d_t_squared) >> 33;
+    // OFF2 = 61 * (TEMP-2000)**2 / 2**4
+    pressure_offset_2 = 61 * low_temperature_adjustment;
+    // SENS2 = 29 * (TEMP-2000)**2 / 2**4
+    pressure_sensitivity_2 = 29 * low_temperature_adjustment;
+
+    if (temperature < -1500) {
+      // (TEMP+1500)**2
+      const int32_t very_low_temperature_adjustment = (temperature + 1500) * (temperature + 1500);
+
+      // OFF2 = OFF2 + 17 * (TEMP+1500)**2
+      pressure_offset_2 += 17 * very_low_temperature_adjustment;
+      // SENS2 = SENS2 + 9 * (TEMP+1500)**2
+      pressure_sensitivity_2 += 9 * very_low_temperature_adjustment;
+    }
+  } else {
+    // T2 = 5 * (d_t**2) / 2**38
+    temperature_2 = (5 * d_t_squared) >> 38;
+  }
+
+  temperature -= temperature_2;
+  pressure_offset -= pressure_offset_2;
+  pressure_sensitivity -= pressure_sensitivity_2;
+
+  // Temperature compensated pressure. [1000, 120000] => [10.00 mbar, 1200.00 mbar]
+  const int32_t pressure = (((d1_raw_pressure * pressure_sensitivity) >> 21) - pressure_offset) >> 15;
+
+  const float temperature_float = temperature / 100.0f;
+  const float pressure_float = pressure / 100.0f;
+  ESP_LOGD(TAG, "Temperature=%0.2f°C, Pressure=%0.2fhPa", temperature_float, pressure_float);
+
+  if (this->temperature_sensor_ != nullptr) {
+    this->temperature_sensor_->publish_state(temperature_float);
+  }
+  if (this->pressure_sensor_ != nullptr) {
+    this->pressure_sensor_->publish_state(pressure_float);  // hPa aka mbar
+  }
+  this->status_clear_warning();
+
+  if (this->humidity_sensor_ != nullptr) {
+    // now that we have temperature (to compensate the humidity with), kick off that read
+    this->request_read_humidity_(temperature_float);
+  }
+}
+
+}  // namespace ms8607
+}  // namespace esphome

esphome/components/ms8607/ms8607.h

@@ -0,0 +1,109 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace ms8607 {
+
+/**
+ Class for I2CDevice used to communicate with the Humidity sensor
+ on the chip. See MS8607Component instead
+ */
+class MS8607HumidityDevice : public i2c::I2CDevice {
+ public:
+  uint8_t get_address() { return address_; }
+};
+
+/**
+ Temperature, pressure, and humidity sensor.
+
+ By default, the MS8607 measures sensors at the highest resolution.
+ A potential enhancement would be to expose the resolution as a configurable
+ setting.  A lower resolution speeds up ADC conversion time & uses less power.
+
+ Datasheet:
+ https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data+Sheet%7FMS8607-02BA01%7FB3%7Fpdf%7FEnglish%7FENG_DS_MS8607-02BA01_B3.pdf%7FCAT-BLPS0018
+
+ Other implementations:
+ - https://github.com/TEConnectivity/MS8607_Generic_C_Driver
+ - https://github.com/adafruit/Adafruit_MS8607
+ - https://github.com/sparkfun/SparkFun_PHT_MS8607_Arduino_Library
+ */
+class MS8607Component : public PollingComponent, public i2c::I2CDevice {
+ public:
+  virtual ~MS8607Component() = default;
+  void setup() override;
+  void update() override;
+  void dump_config() override;
+  float get_setup_priority() const override { return setup_priority::DATA; };
+
+  void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
+  void set_pressure_sensor(sensor::Sensor *pressure_sensor) { pressure_sensor_ = pressure_sensor; }
+  void set_humidity_sensor(sensor::Sensor *humidity_sensor) { humidity_sensor_ = humidity_sensor; }
+  void set_humidity_device(MS8607HumidityDevice *humidity_device) { humidity_device_ = humidity_device; }
+
+ protected:
+  /**
+   Read and store the Pressure & Temperature calibration settings from the PROM.
+   Intended to be called during setup(), this will set the `failure_reason_`
+   */
+  bool read_calibration_values_from_prom_();
+
+  /// Start async temperature read
+  void request_read_temperature_();
+  /// Process async temperature read
+  void read_temperature_();
+  /// start async pressure read
+  void request_read_pressure_(uint32_t raw_temperature);
+  /// process async pressure read
+  void read_pressure_(uint32_t raw_temperature);
+  /// start async humidity read
+  void request_read_humidity_(float temperature_float);
+  /// process async humidity read
+  void read_humidity_(float temperature_float);
+  /// use raw temperature & pressure to calculate & publish values
+  void calculate_values_(uint32_t raw_temperature, uint32_t raw_pressure);
+
+  sensor::Sensor *temperature_sensor_;
+  sensor::Sensor *pressure_sensor_;
+  sensor::Sensor *humidity_sensor_;
+
+  /** I2CDevice object to communicate with secondary I2C address for the humidity sensor
+   *
+   * The MS8607 only has one set of I2C pins, despite using two different addresses.
+   *
+   * Default address for humidity is 0x40
+   */
+  MS8607HumidityDevice *humidity_device_;
+
+  /// This device's pressure & temperature calibration values, read from PROM
+  struct CalibrationValues {
+    /// Pressure sensitivity | SENS-T1. [C1]
+    uint16_t pressure_sensitivity;
+    /// Temperature coefficient of pressure sensitivity | TCS. [C3]
+    uint16_t pressure_sensitivity_temperature_coefficient;
+    /// Pressure offset | OFF-T1. [C2]
+    uint16_t pressure_offset;
+    /// Temperature coefficient of pressure offset | TCO. [C4]
+    uint16_t pressure_offset_temperature_coefficient;
+    /// Reference temperature | T-REF. [C5]
+    uint16_t reference_temperature;
+    /// Temperature coefficient of the temperature | TEMPSENS. [C6]
+    uint16_t temperature_coefficient_of_temperature;
+  } calibration_values_;
+
+  /// Possible failure reasons of this component
+  enum class ErrorCode;
+  /// Keep track of the reason why this component failed, to augment the dumped config
+  ErrorCode error_code_;
+
+  /// Current progress through required component setup
+  enum class SetupStatus;
+  /// Current step in the multi-step & possibly delayed setup() process
+  SetupStatus setup_status_;
+};
+
+}  // namespace ms8607
+}  // namespace esphome

esphome/components/ms8607/sensor.py

@@ -0,0 +1,83 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import i2c, sensor
+from esphome.const import (
+    CONF_HUMIDITY,
+    CONF_ID,
+    CONF_PRESSURE,
+    CONF_TEMPERATURE,
+    DEVICE_CLASS_HUMIDITY,
+    DEVICE_CLASS_PRESSURE,
+    DEVICE_CLASS_TEMPERATURE,
+    STATE_CLASS_MEASUREMENT,
+    UNIT_CELSIUS,
+    UNIT_HECTOPASCAL,
+    UNIT_PERCENT,
+)
+
+DEPENDENCIES = ["i2c"]
+
+ms8607_ns = cg.esphome_ns.namespace("ms8607")
+MS8607Component = ms8607_ns.class_(
+    "MS8607Component", cg.PollingComponent, i2c.I2CDevice
+)
+
+CONF_HUMIDITY_I2C_ID = "humidity_i2c_id"
+MS8607HumidityDevice = ms8607_ns.class_("MS8607HumidityDevice", i2c.I2CDevice)
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(MS8607Component),
+            cv.Required(CONF_TEMPERATURE): sensor.sensor_schema(
+                unit_of_measurement=UNIT_CELSIUS,
+                accuracy_decimals=2,  # Resolution: 0.01
+                device_class=DEVICE_CLASS_TEMPERATURE,
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Required(CONF_PRESSURE): sensor.sensor_schema(
+                unit_of_measurement=UNIT_HECTOPASCAL,
+                accuracy_decimals=2,  # Resolution: 0.016
+                device_class=DEVICE_CLASS_PRESSURE,
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Required(CONF_HUMIDITY): sensor.sensor_schema(
+                unit_of_measurement=UNIT_PERCENT,
+                accuracy_decimals=2,  # Resolution: 0.04
+                device_class=DEVICE_CLASS_HUMIDITY,
+                state_class=STATE_CLASS_MEASUREMENT,
+            )
+            .extend(
+                {
+                    cv.GenerateID(CONF_HUMIDITY_I2C_ID): cv.declare_id(
+                        MS8607HumidityDevice
+                    ),
+                }
+            )
+            .extend(i2c.i2c_device_schema(0x40)),  # default address for humidity
+        }
+    )
+    .extend(cv.polling_component_schema("60s"))
+    .extend(i2c.i2c_device_schema(0x76))  # default address for temp/pressure
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    await i2c.register_i2c_device(var, config)
+
+    if temperature_config := config.get(CONF_TEMPERATURE):
+        sens = await sensor.new_sensor(temperature_config)
+        cg.add(var.set_temperature_sensor(sens))
+
+    if pressure_config := config.get(CONF_PRESSURE):
+        sens = await sensor.new_sensor(pressure_config)
+        cg.add(var.set_pressure_sensor(sens))
+
+    if humidity_config := config.get(CONF_HUMIDITY):
+        sens = await sensor.new_sensor(humidity_config)
+        cg.add(var.set_humidity_sensor(sens))
+        humidity_device = cg.new_Pvariable(humidity_config[CONF_HUMIDITY_I2C_ID])
+        await i2c.register_i2c_device(humidity_device, humidity_config)
+        cg.add(var.set_humidity_device(humidity_device))

esphome/core/component.h

@@ -193,7 +193,7 @@ class Component {
    * again in the future.
    *
    * The first retry of f happens after `initial_wait_time` milliseconds. The delay between retries is
-   * increased by multipling by `backoff_increase_factor` each time. If no backoff_increase_factor is
+   * increased by multiplying by `backoff_increase_factor` each time. If no backoff_increase_factor is
    * supplied (default = 1.0), the wait time will stay constant.
    *
    * The retry function f needs to accept a single argument: the number of attempts remaining. On the

tests/test5.yaml

@@ -483,6 +483,29 @@ sensor:
     address: 0x77
     iir_filter: 2X
 
+  - platform: ms8607
+    temperature:
+      name: Temperature
+    humidity:
+      name: Humidity
+    pressure:
+      name: Pressure
+  - platform: ms8607
+    id: ms8607_more_config
+    temperature:
+      name: Indoor Temperature
+      accuracy_decimals: 1
+    pressure:
+      name: Indoor Pressure
+      internal: true
+    humidity:
+      name: Indoor Humidity
+      address: 0x41
+      i2c_id:
+    i2c_id:
+    address: 0x77
+    update_interval: 10min
+
   - platform: sen5x
     id: sen54
     temperature: