lps22: add a component

LPS22HB/HH is a barometric pressure sensor. It has pretty high accuracy,
is somewhat less prone to measuring weird stuff compared to competing
chips and is reasonably widely available for purchase.

This adds a very basic one-shot based implementation for interacting
with this sensor over an I2C bus. The chip also supports communication
over SPI, but I don't have the means to test such configuration (for my
PCB is baked for I2C) as well as measuring the conditions in a automatic
mode. These are left as future extensions to the basic implementation
seen here.

CODEOWNERS

@@ -228,6 +228,7 @@ esphome/components/lightwaverf/* @max246
 esphome/components/lilygo_t5_47/touchscreen/* @jesserockz
 esphome/components/lock/* @esphome/core
 esphome/components/logger/* @esphome/core
+esphome/components/lps22/* @nagisa
 esphome/components/ltr390/* @latonita @sjtrny
 esphome/components/ltr501/* @latonita
 esphome/components/ltr_als_ps/* @latonita

esphome/components/lps22/lps22.cpp

@@ -0,0 +1,66 @@
+#include "lps22.h"
+
+namespace esphome {
+namespace lps22 {
+
+static constexpr const char *const TAG = "lps22";
+
+static constexpr uint8_t WHO_AM_I = 0x0F;
+static constexpr uint8_t LPS22HB_ID = 0xB1;
+static constexpr uint8_t LPS22HH_ID = 0xB3;
+static constexpr uint8_t CTRL_REG2 = 0x11;
+static constexpr uint8_t CTRL_REG2_ONE_SHOT_MASK = 0b1;
+static constexpr uint8_t STATUS = 0x27;
+static constexpr uint8_t STATUS_T_DA_MASK = 0b10;
+static constexpr uint8_t STATUS_P_DA_MASK = 0b01;
+static constexpr uint8_t TEMP_L = 0x2b;
+static constexpr uint8_t PRES_OUT_XL = 0x28;
+static constexpr uint8_t REF_P_XL = 0x28;
+static constexpr uint8_t READ_ATTEMPTS = 10;
+static constexpr uint8_t READ_INTERVAL = 5;
+static constexpr float PRESSURE_SCALE = 1. / 4096.;
+static constexpr float TEMPERATURE_SCALE = 0.01;
+
+void LPS22Component::setup() {}
+
+void LPS22Component::dump_config() { LOG_I2C_DEVICE(this); }
+
+void LPS22Component::update() {
+  uint8_t value = 0x00;
+  this->read_register(WHO_AM_I, &value, 1);
+  if (value != LPS22HB_ID && value != LPS22HH_ID) {
+    ESP_LOGW(TAG, "device IDs as %02x, which isn't a known LPS22HB or LPS22HH ID", value);
+    return;
+  }
+
+  this->read_register(CTRL_REG2, &value, 1);
+  value |= CTRL_REG2_ONE_SHOT_MASK;
+  this->write_register(CTRL_REG2, &value, 1);
+
+  this->set_retry(READ_INTERVAL, READ_ATTEMPTS, [this](uint8_t _) { return this->try_read_(); });
+}
+
+RetryResult LPS22Component::try_read_() {
+  uint8_t value = 0x00;
+  this->read_register(STATUS, &value, 1);
+  const uint8_t expected_status_mask = STATUS_T_DA_MASK | STATUS_P_DA_MASK;
+  if ((value & expected_status_mask) != expected_status_mask) {
+    ESP_LOGD(TAG, "STATUS not ready: %x", value);
+    return RetryResult::RETRY;
+  }
+
+  uint8_t t_buf[2]{0};
+  this->read_register(TEMP_L, t_buf, 2);
+  float temp =
+      TEMPERATURE_SCALE * static_cast<float>(static_cast<int16_t>(t_buf[1]) << 8 | static_cast<int16_t>(t_buf[0]));
+  this->temperature_sensor_->publish_state(temp);
+  uint8_t p_buf[3]{0};
+  this->read_register(PRES_OUT_XL, p_buf, 3);
+  uint32_t p_lsb =
+      static_cast<uint32_t>(p_buf[2]) << 16 | static_cast<uint32_t>(p_buf[1]) << 8 | static_cast<uint32_t>(p_buf[0]);
+  this->pressure_sensor_->publish_state(PRESSURE_SCALE * static_cast<float>(p_lsb));
+  return RetryResult::DONE;
+}
+
+}  // namespace lps22
+}  // namespace esphome

esphome/components/lps22/lps22.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace lps22 {
+
+class LPS22Component : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
+ public:
+  void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
+  void set_pressure_sensor(sensor::Sensor *pressure_sensor) { pressure_sensor_ = pressure_sensor; }
+
+  LPS22Component() : PollingComponent(15000) {}
+
+  void setup() override;
+  void update() override;
+  void dump_config() override;
+
+ protected:
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
+
+ private:
+  RetryResult try_read_();
+};
+
+}  // namespace lps22
+}  // namespace esphome

esphome/components/lps22/sensor.py

@@ -0,0 +1,58 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import i2c, sensor
+from esphome.const import (
+    CONF_ID,
+    CONF_TEMPERATURE,
+    CONF_PRESSURE,
+    STATE_CLASS_MEASUREMENT,
+    UNIT_CELSIUS,
+    UNIT_HECTOPASCAL,
+    ICON_THERMOMETER,
+    DEVICE_CLASS_TEMPERATURE,
+    DEVICE_CLASS_PRESSURE,
+)
+
+CODEOWNERS = ["@nagisa"]
+DEPENDENCIES = ["i2c"]
+
+lps22 = cg.esphome_ns.namespace("lps22")
+
+LPS22Component = lps22.class_("LPS22Component", cg.PollingComponent, i2c.I2CDevice)
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(LPS22Component),
+            cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(
+                unit_of_measurement=UNIT_CELSIUS,
+                icon=ICON_THERMOMETER,
+                accuracy_decimals=2,
+                device_class=DEVICE_CLASS_TEMPERATURE,
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Optional(CONF_PRESSURE): sensor.sensor_schema(
+                unit_of_measurement=UNIT_HECTOPASCAL,
+                accuracy_decimals=2,
+                device_class=DEVICE_CLASS_PRESSURE,
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+        }
+    )
+    .extend(cv.polling_component_schema("60s"))
+    .extend(i2c.i2c_device_schema(0x5D))  # can also be 0x5C
+)
+
+
+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 CONF_TEMPERATURE in config:
+        sens = await sensor.new_sensor(config[CONF_TEMPERATURE])
+        cg.add(var.set_temperature_sensor(sens))
+
+    if CONF_PRESSURE in config:
+        sens = await sensor.new_sensor(config[CONF_PRESSURE])
+        cg.add(var.set_pressure_sensor(sens))

tests/components/lps22/common.yaml

@@ -0,0 +1,8 @@
+sensor:
+  - platform: lps22
+    address: 0x5d
+    update_interval: 10s
+    temperature:
+      name: "LPS22 Temperature"
+    pressure:
+      name: "LPS22 Pressure"

tests/components/lps22/test.esp32-ard.yaml

@@ -0,0 +1,6 @@
+i2c:
+  - id: i2c_lps22
+    scl: 16
+    sda: 17
+
+<<: !include common.yaml

tests/components/lps22/test.esp32-c3-ard.yaml

@@ -0,0 +1,6 @@
+i2c:
+  - id: i2c_lps22
+    scl: 5
+    sda: 4
+
+<<: !include common.yaml

tests/components/lps22/test.esp32-c3-idf.yaml

@@ -0,0 +1,6 @@
+i2c:
+  - id: i2c_lps22
+    scl: 5
+    sda: 4
+
+<<: !include common.yaml

tests/components/lps22/test.esp32-idf.yaml

@@ -0,0 +1,6 @@
+i2c:
+  - id: i2c_lps22
+    scl: 16
+    sda: 17
+
+<<: !include common.yaml

tests/components/lps22/test.esp8266-ard.yaml

@@ -0,0 +1,6 @@
+i2c:
+  - id: i2c_lps22
+    scl: 5
+    sda: 4
+
+<<: !include common.yaml

tests/components/lps22/test.rp2040-ard.yaml

@@ -0,0 +1,6 @@
+i2c:
+  - id: i2c_lps22
+    scl: 5
+    sda: 4
+
+<<: !include common.yaml