Add support for Airthing Wave Mini (#2440)

esphome/components/airthings_wave_mini/airthings_wave_mini.h

@@ -0,0 +1,65 @@
+#pragma once
+
+#ifdef USE_ESP32_FRAMEWORK_ARDUINO
+
+#include <algorithm>
+#include <iterator>
+#include <esp_gattc_api.h>
+#include <BLEDevice.h>
+#include "esphome/core/component.h"
+#include "esphome/core/log.h"
+#include "esphome/components/ble_client/ble_client.h"
+#include "esphome/components/esp32_ble_tracker/esp32_ble_tracker.h"
+#include "esphome/components/sensor/sensor.h"
+
+namespace esphome {
+namespace airthings_wave_mini {
+
+class AirthingsWaveMini : public PollingComponent, public ble_client::BLEClientNode {
+ public:
+  AirthingsWaveMini();
+
+  void setup() override;
+  void dump_config() override;
+  void update() override;
+  void loop() override;
+
+  void gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if,
+                           esp_ble_gattc_cb_param_t *param) override;
+
+  void set_temperature(sensor::Sensor *temperature) { temperature_sensor_ = temperature; }
+  void set_humidity(sensor::Sensor *humidity) { humidity_sensor_ = humidity; }
+  void set_pressure(sensor::Sensor *pressure) { pressure_sensor_ = pressure; }
+  void set_tvoc(sensor::Sensor *tvoc) { tvoc_sensor_ = tvoc; }
+
+ protected:
+  bool is_valid_voc_value_(uint16_t voc);
+
+  void read_sensors_(uint8_t *value, uint16_t value_len);
+  void request_read_values_();
+
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
+  sensor::Sensor *tvoc_sensor_{nullptr};
+
+  uint16_t handle_;
+  esp32_ble_tracker::ESPBTUUID service_uuid_;
+  esp32_ble_tracker::ESPBTUUID sensors_data_characteristic_uuid_;
+
+  struct WaveMiniReadings {
+    uint16_t unused01;
+    uint16_t temperature;
+    uint16_t pressure;
+    uint16_t humidity;
+    uint16_t voc;
+    uint16_t unused02;
+    uint32_t unused03;
+    uint32_t unused04;
+  };
+};
+
+}  // namespace airthings_wave_mini
+}  // namespace esphome
+
+#endif  // USE_ESP32_FRAMEWORK_ARDUINO