[lm75b] Add LM75B temperature sensor component (#10534)

CODEOWNERS

@@ -256,6 +256,7 @@ esphome/components/libretiny_pwm/* @kuba2k2
 esphome/components/light/* @esphome/core
 esphome/components/lightwaverf/* @max246
 esphome/components/lilygo_t5_47/touchscreen/* @jesserockz
+esphome/components/lm75b/* @beormund
 esphome/components/ln882x/* @lamauny
 esphome/components/lock/* @esphome/core
 esphome/components/logger/* @esphome/core

esphome/components/lm75b/lm75b.cpp

@@ -0,0 +1,39 @@
+#include "lm75b.h"
+#include "esphome/core/log.h"
+#include "esphome/core/hal.h"
+
+namespace esphome {
+namespace lm75b {
+
+static const char *const TAG = "lm75b";
+
+void LM75BComponent::dump_config() {
+  ESP_LOGCONFIG(TAG, "LM75B:");
+  LOG_I2C_DEVICE(this);
+  if (this->is_failed()) {
+    ESP_LOGE(TAG, "Setting up LM75B failed!");
+  }
+  LOG_UPDATE_INTERVAL(this);
+  LOG_SENSOR("  ", "Temperature", this);
+}
+
+void LM75BComponent::update() {
+  // Create a temporary buffer
+  uint8_t buff[2];
+  if (this->read_register(LM75B_REG_TEMPERATURE, buff, 2) != i2c::ERROR_OK) {
+    this->status_set_warning();
+    return;
+  }
+  // Obtain combined 16-bit value
+  int16_t raw_temperature = (buff[0] << 8) | buff[1];
+  // Read the 11-bit raw temperature value
+  raw_temperature >>= 5;
+  // Publish the temperature in °C
+  this->publish_state(raw_temperature * 0.125);
+  if (this->status_has_warning()) {
+    this->status_clear_warning();
+  }
+}
+
+}  // namespace lm75b
+}  // namespace esphome

esphome/components/lm75b/lm75b.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace lm75b {
+
+static const uint8_t LM75B_REG_TEMPERATURE = 0x00;
+
+class LM75BComponent : public PollingComponent, public i2c::I2CDevice, public sensor::Sensor {
+ public:
+  void dump_config() override;
+  void update() override;
+};
+
+}  // namespace lm75b
+}  // namespace esphome

esphome/components/lm75b/sensor.py

@@ -0,0 +1,34 @@
+import esphome.codegen as cg
+from esphome.components import i2c, sensor
+import esphome.config_validation as cv
+from esphome.const import (
+    DEVICE_CLASS_TEMPERATURE,
+    STATE_CLASS_MEASUREMENT,
+    UNIT_CELSIUS,
+)
+
+CODEOWNERS = ["@beormund"]
+DEPENDENCIES = ["i2c"]
+
+lm75b_ns = cg.esphome_ns.namespace("lm75b")
+LM75BComponent = lm75b_ns.class_(
+    "LM75BComponent", cg.PollingComponent, i2c.I2CDevice, sensor.Sensor
+)
+
+CONFIG_SCHEMA = (
+    sensor.sensor_schema(
+        LM75BComponent,
+        unit_of_measurement=UNIT_CELSIUS,
+        accuracy_decimals=3,
+        device_class=DEVICE_CLASS_TEMPERATURE,
+        state_class=STATE_CLASS_MEASUREMENT,
+    )
+    .extend(cv.polling_component_schema("60s"))
+    .extend(i2c.i2c_device_schema(0x48))
+)
+
+
+async def to_code(config):
+    var = await sensor.new_sensor(config)
+    await cg.register_component(var, config)
+    await i2c.register_i2c_device(var, config)

tests/components/lm75b/common.yaml

@@ -0,0 +1,9 @@
+i2c:
+  - id: i2c_lm75b
+    scl: ${scl_pin}
+    sda: ${sda_pin}
+
+sensor:
+  - platform: lm75b
+    name: LM75B Temperature
+    update_interval: 30s

tests/components/lm75b/test.esp32-ard.yaml

@@ -0,0 +1,5 @@
+substitutions:
+  scl_pin: GPIO15
+  sda_pin: GPIO13
+
+<<: !include common.yaml

tests/components/lm75b/test.esp32-c3-ard.yaml

@@ -0,0 +1,5 @@
+substitutions:
+  scl_pin: GPIO5
+  sda_pin: GPIO4
+
+<<: !include common.yaml

tests/components/lm75b/test.esp32-c3-idf.yaml

@@ -0,0 +1,5 @@
+substitutions:
+  scl_pin: GPIO5
+  sda_pin: GPIO4
+
+<<: !include common.yaml

tests/components/lm75b/test.esp32-idf.yaml

@@ -0,0 +1,5 @@
+substitutions:
+  scl_pin: GPIO15
+  sda_pin: GPIO13
+
+<<: !include common.yaml

tests/components/lm75b/test.esp8266-ard.yaml

@@ -0,0 +1,5 @@
+substitutions:
+  scl_pin: GPIO5
+  sda_pin: GPIO4
+
+<<: !include common.yaml

tests/components/lm75b/test.rp2040-ard.yaml

@@ -0,0 +1,5 @@
+substitutions:
+  scl_pin: GPIO5
+  sda_pin: GPIO4
+
+<<: !include common.yaml