ESPHOME BTHome

dev4.yaml

esphome:
  name: dev4
  friendly_name: BTHome dev4

interval:
  - interval: 5s
    startup_delay: 1s
    then:
      - lambda: |-
          // Update sensor then wait
          id(sht).update();
      - delay: 0.01s
      - lambda: |-
          // Get temperature and humitidy with .1 accuracy
          int temperature = ((int)roundf(id(sht_temperature).state * 10)) * 10;  
          int humidity = ((int)roundf(id(sht_humidity).state * 10)) * 10; 

          // Create points to enable little endian conversion
          uint8_t *pTemperature = (uint8_t*)&temperature;
          uint8_t *pHumidity = (uint8_t*)&humidity;

          // Create and send BTHome payload
          std::vector<uint8_t> service_data = {
            0xD2, 0xFC,                         // BTHome UUID
            0x40,                               // BTHome Device Information
            0x02,                               // Temperature type
            pTemperature[0], pTemperature[1],   // Actual temperature (little endian)
            0x03,                               // Humidity type
            pHumidity[0], pHumidity[1]          // Actual humidity (little endian)
          };
          esphome::esp32_ble::global_ble->advertising_set_service_data(service_data);
          ESP_LOGD("BThome", "Sent Temperature: %i, Humidity: %i", temperature, humidity);
          ESP_LOGD("BThome", "Hex Temperature:  0x%02X%02X, Humidity: 0x%02X%02X", pTemperature[0], pTemperature[1], pHumidity[0], pHumidity[1]);

esp32:
  board: adafruit_feather_esp32s3_nopsram
  framework:
    type: arduino

# Enable logging
logger:
  level: very_verbose

# Enable Home Assistant API
api:
  encryption:
    key: <REDACTED>

ota:
  password: <REDACTED>

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

i2c:
  sda:
    number: GPIO3
    ignore_strapping_warning: true
  scl: GPIO4

sensor:
  - platform: sht4x
    id: sht
    temperature:
      id: sht_temperature
      name: "Temperature"
      accuracy_decimals: 1
    humidity:
      id: sht_humidity
      name: "Relative Humidity"
      accuracy_decimals: 1

esp32_ble_server:
  id: ble
  manufacturer: "Orange"
  manufacturer_data: [0x4C, 0, 0x23, 77, 0xF0]