Add MPL115A2 Barometric Pressure/Temperature Sensor

CODEOWNERS

@@ -241,6 +241,7 @@ esphome/components/modbus_controller/text_sensor/* @martgras
 esphome/components/mopeka_ble/* @Fabian-Schmidt @spbrogan
 esphome/components/mopeka_pro_check/* @spbrogan
 esphome/components/mopeka_std_check/* @Fabian-Schmidt
+esphome/components/mpl115a2/* @unic8s
 esphome/components/mpl3115a2/* @kbickar
 esphome/components/mpu6886/* @fabaff
 esphome/components/ms8607/* @e28eta

esphome/components/mpl115a2/__init__.py

@@ -0,0 +1 @@
+CODEOWNERS = ["@unic8s"]

esphome/components/mpl115a2/mpl115a2.cpp

@@ -0,0 +1,85 @@
+#include "mpl115a2.h"
+#include "esphome/core/hal.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace mpl115a2 {
+
+static const char *const TAG = "mpl115a2";
+
+void MPL115A2Component::setup() {
+  ESP_LOGCONFIG(TAG, "Setting up MPL115A2...");
+
+  this->read_coefficients_();
+}
+
+void MPL115A2Component::read_coefficients_() {
+  int16_t a0coeff;
+  int16_t b1coeff;
+  int16_t b2coeff;
+  int16_t c12coeff;
+
+  uint8_t cmd;
+  uint8_t buffer[8];
+
+  cmd = MPL115A2_REGISTER_A0_COEFF_MSB;
+  this->write(&cmd, 1);
+  this->read(buffer, 8);
+
+  a0coeff = (((uint16_t) buffer[0] << 8) | buffer[1]);
+  b1coeff = (((uint16_t) buffer[2] << 8) | buffer[3]);
+  b2coeff = (((uint16_t) buffer[4] << 8) | buffer[5]);
+  c12coeff = (((uint16_t) buffer[6] << 8) | buffer[7]) >> 2;
+
+  mpl115a2_a0_ = (float) a0coeff / 8;
+  mpl115a2_b1_ = (float) b1coeff / 8192;
+  mpl115a2_b2_ = (float) b2coeff / 16384;
+  mpl115a2_c12_ = (float) c12coeff;
+  mpl115a2_c12_ /= 4194304.0;
+}
+
+void MPL115A2Component::dump_config() {
+  ESP_LOGCONFIG(TAG, "MPL115A2:");
+  LOG_I2C_DEVICE(this);
+  LOG_UPDATE_INTERVAL(this);
+  LOG_SENSOR("  ", "Temperature", this->temperature_);
+  LOG_SENSOR("  ", "Pressure", this->pressure_);
+}
+
+void MPL115A2Component::update() {
+  uint16_t pressure_in, temp_in;
+  float pressure_comp;
+
+  uint8_t cmd[2] = {MPL115A2_REGISTER_STARTCONVERSION, 0};
+  uint8_t buffer[4];
+
+  this->write(cmd, 2);
+
+  // Wait a bit for the conversion to complete (3ms max)
+  delay(5);
+
+  cmd[0] = MPL115A2_REGISTER_PRESSURE_MSB;
+  this->write(cmd, 1);
+  this->read(buffer, 4);
+
+  pressure_in = (((uint16_t) buffer[0] << 8) | buffer[1]) >> 6;
+  temp_in = (((uint16_t) buffer[2] << 8) | buffer[3]) >> 6;
+
+  // See datasheet p.6 for evaluation sequence
+  pressure_comp = mpl115a2_a0_ + (mpl115a2_b1_ + mpl115a2_c12_ * temp_in) * pressure_in + mpl115a2_b2_ * temp_in;
+
+  float pressure_out = ((65.0F / 1023.0F) * pressure_comp) + 50.0F;
+  if (this->pressure_ != nullptr)
+    this->pressure_->publish_state(pressure_out);
+
+  float temperature_out = ((float) temp_in - 498.0F) / -5.35F + 25.0F;
+  if (this->temperature_ != nullptr)
+    this->temperature_->publish_state(temperature_out);
+
+  ESP_LOGD(TAG, "Got Temperature=%.1f°C Pressure=%.1f", temperature_out, pressure_out);
+
+  this->status_clear_warning();
+}
+
+}  // namespace mpl115a2
+}  // namespace esphome

esphome/components/mpl115a2/mpl115a2.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace mpl115a2 {
+
+// enums from https://github.com/adafruit/Adafruit_MPL115A2/
+/** MPL115A2 registers **/
+enum {
+  MPL115A2_REGISTER_PRESSURE_MSB = (0x00),
+  MPL115A2_REGISTER_PRESSURE_LSB = (0x01),
+
+  MPL115A2_REGISTER_TEMP_MSB = (0x02),
+  MPL115A2_REGISTER_TEMP_LSB = (0x03),
+
+  MPL115A2_REGISTER_A0_COEFF_MSB = (0x04),
+
+  MPL115A2_REGISTER_STARTCONVERSION = (0x12),
+};
+
+class MPL115A2Component : public PollingComponent, public i2c::I2CDevice {
+ public:
+  void set_temperature(sensor::Sensor *temperature) { temperature_ = temperature; }
+  void set_pressure(sensor::Sensor *pressure) { pressure_ = pressure; }
+
+  void setup() override;
+  void dump_config() override;
+  void update() override;
+
+  float get_setup_priority() const override { return setup_priority::DATA; }
+
+ private:
+  float mpl115a2_a0_;
+  float mpl115a2_b1_;
+  float mpl115a2_b2_;
+  float mpl115a2_c12_;
+
+  void read_coefficients_();
+
+ protected:
+  sensor::Sensor *temperature_{nullptr};
+  sensor::Sensor *pressure_{nullptr};
+};
+
+}  // namespace mpl115a2
+}  // namespace esphome

esphome/components/mpl115a2/sensor.py

@@ -0,0 +1,57 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import i2c, sensor
+from esphome.const import (
+    CONF_ID,
+    CONF_PRESSURE,
+    CONF_TEMPERATURE,
+    DEVICE_CLASS_PRESSURE,
+    DEVICE_CLASS_TEMPERATURE,
+    STATE_CLASS_MEASUREMENT,
+    UNIT_CELSIUS,
+    UNIT_HECTOPASCAL,
+)
+
+CODEOWNERS = ["@unic8s"]
+DEPENDENCIES = ["i2c"]
+
+mpl115a2_ns = cg.esphome_ns.namespace("mpl115a2")
+MPL115A2Component = mpl115a2_ns.class_(
+    "MPL115A2Component", cg.PollingComponent, i2c.I2CDevice
+)
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(MPL115A2Component),
+            cv.Optional(CONF_PRESSURE): sensor.sensor_schema(
+                unit_of_measurement=UNIT_HECTOPASCAL,
+                accuracy_decimals=1,
+                device_class=DEVICE_CLASS_PRESSURE,
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(
+                unit_of_measurement=UNIT_CELSIUS,
+                accuracy_decimals=1,
+                device_class=DEVICE_CLASS_TEMPERATURE,
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+        }
+    )
+    .extend(cv.polling_component_schema("60s"))
+    .extend(i2c.i2c_device_schema(0x60))
+)
+
+
+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_PRESSURE in config:
+        sens = await sensor.new_sensor(config[CONF_PRESSURE])
+        cg.add(var.set_pressure(sens))
+
+    if CONF_TEMPERATURE in config:
+        sens = await sensor.new_sensor(config[CONF_TEMPERATURE])
+        cg.add(var.set_temperature(sens))

tests/test1.yaml

@@ -1608,6 +1608,12 @@ sensor:
     object:
       name: Object
       emissivity: 1.0
+  - platform: mpl115a2
+    i2c_id: i2c_bus
+    temperature:
+      name: "MPL115A2 Temperature"
+    pressure:
+      name: "MPL115A2 Pressure"
   - platform: mpl3115a2
     i2c_id: i2c_bus
     temperature: