Added tmp102 temperature sensor support (#929)

* Added tmp102 temperature sensor support

* Added sensor to test3.yaml

* Moved docstring to component root

* Tweak formatting from clang-format script

* Removed extra newline at the end of the file to satisfy pylint

* Update schema to match that of other single-value sensors

In ESPHome, sensors that only expose one value do not put the sensor under another key.

* Add missing import

* Fix test after structural change to component

* removed unused setting

* Update esphome/components/tmp102/tmp102.cpp

Co-authored-by: Otto Winter <otto@otto-winter.com>
Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/tmp102/__init__.py

@@ -0,0 +1,9 @@
+"""
+The TMP102 is a two-wire, serial output temperature
+sensor available in a tiny SOT563 package. Requiring
+no external components, the TMP102 is capable of
+reading temperatures to a resolution of 0.0625°C.
+
+https://www.sparkfun.com/datasheets/Sensors/Temperature/tmp102.pdf
+
+"""

esphome/components/tmp102/sensor.py

@@ -0,0 +1,30 @@
+"""
+The TMP102 is a two-wire, serial output temperature
+sensor available in a tiny SOT563 package. Requiring
+no external components, the TMP102 is capable of
+reading temperatures to a resolution of 0.0625°C.
+
+https://www.sparkfun.com/datasheets/Sensors/Temperature/tmp102.pdf
+
+"""
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import i2c, sensor
+from esphome.const import CONF_ID, UNIT_CELSIUS, ICON_THERMOMETER
+
+DEPENDENCIES = ['i2c']
+
+tmp102_ns = cg.esphome_ns.namespace('tmp102')
+TMP102Component = tmp102_ns.class_("TMP102Component", cg.PollingComponent, i2c.I2CDevice,
+                                   sensor.Sensor)
+
+CONFIG_SCHEMA = sensor.sensor_schema(UNIT_CELSIUS, ICON_THERMOMETER, 1).extend({
+    cv.GenerateID(): cv.declare_id(TMP102Component),
+}).extend(cv.polling_component_schema("60s")).extend(i2c.i2c_device_schema(0x48))
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield cg.register_component(var, config)
+    yield i2c.register_i2c_device(var, config)
+    yield sensor.register_sensor(var, config)

esphome/components/tmp102/tmp102.cpp

@@ -0,0 +1,47 @@
+#include "tmp102.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace tmp102 {
+
+static const char *TAG = "tmp102";
+
+static const uint8_t TMP102_ADDRESS = 0x48;
+static const uint8_t TMP102_REGISTER_TEMPERATURE = 0x00;
+static const uint8_t TMP102_REGISTER_CONFIGURATION = 0x01;
+static const uint8_t TMP102_REGISTER_LOW_LIMIT = 0x02;
+static const uint8_t TMP102_REGISTER_HIGH_LIMIT = 0x03;
+
+static const float TMP102_CONVERSION_FACTOR = 0.0625;
+
+void TMP102Component::setup() { ESP_LOGCONFIG(TAG, "Setting up TMP102..."); }
+
+void TMP102Component::dump_config() {
+  ESP_LOGCONFIG(TAG, "TMP102:");
+  LOG_I2C_DEVICE(this);
+  if (this->is_failed()) {
+    ESP_LOGE(TAG, "Communication with TMP102 failed!");
+  }
+  LOG_UPDATE_INTERVAL(this);
+  LOG_SENSOR("  ", "Temperature", this);
+}
+
+void TMP102Component::update() {
+  uint16_t raw_temperature;
+  if (!this->read_byte_16(TMP102_REGISTER_TEMPERATURE, &raw_temperature, 50)) {
+    this->status_set_warning();
+    return;
+  }
+
+  raw_temperature = raw_temperature >> 4;
+  float temperature = raw_temperature * TMP102_CONVERSION_FACTOR;
+  ESP_LOGD(TAG, "Got Temperature=%.1f°C", temperature);
+
+  this->publish_state(temperature);
+  this->status_clear_warning();
+}
+
+float TMP102Component::get_setup_priority() const { return setup_priority::DATA; }
+
+}  // namespace tmp102
+}  // namespace esphome

esphome/components/tmp102/tmp102.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace tmp102 {
+
+class TMP102Component : public PollingComponent, public i2c::I2CDevice, public sensor::Sensor {
+ public:
+  /// Setup (reset) the sensor and check connection.
+  void setup() override;
+  void dump_config() override;
+  /// Update the sensor values (temperature)
+  void update() override;
+
+  float get_setup_priority() const override;
+};
+
+}  // namespace tmp102
+}  // namespace esphome

tests/test3.yaml

@@ -375,6 +375,8 @@ sensor:
       name: "PZEMDC Current"
     power:
       name: "PZEMDC Power"
+  - platform: tmp102
+    name: "TMP102 Temperature"
   - platform: hm3301
     pm_1_0:
       name: "PM1.0"