SHT85 Temperature and Humidity Sensor

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/i2c.h"

#define I2C_MASTER_SCL_IO    22    /*!< GPIO number used for I2C master clock */
#define I2C_MASTER_SDA_IO    21    /*!< GPIO number used for I2C master data */
#define I2C_MASTER_NUM       I2C_NUM_0 /*!< I2C master I2C port number */
#define I2C_MASTER_FREQ_HZ   100000     /*!< I2C master clock frequency */
#define SHT85_SENSOR_ADDR    0x44       /*!< SHT85 I2C address */

static esp_err_t i2c_master_init(void) {
    i2c_config_t conf = {
        .mode = I2C_MODE_MASTER,
        .sda_io_num = I2C_MASTER_SDA_IO,
        .scl_io_num = I2C_MASTER_SCL_IO,
        .sda_pullup_en = GPIO_PULLUP_ENABLE,
        .scl_pullup_en = GPIO_PULLUP_ENABLE,
        .master.clk_speed = I2C_MASTER_FREQ_HZ,
    };
    esp_err_t err = i2c_param_config(I2C_MASTER_NUM, &conf);
    if (err != ESP_OK) {
        return err;
    }
    return i2c_driver_install(I2C_MASTER_NUM, conf.mode, 0, 0, 0);
}

void read_sht85_sensor() {
    uint8_t data[6];
    uint8_t cmd[] = {0x24, 0x00}; // Command to trigger measurement
    i2c_master_write_to_device(I2C_MASTER_NUM, SHT85_SENSOR_ADDR, cmd, 2, pdMS_TO_TICKS(1000));
    vTaskDelay(pdMS_TO_TICKS(15));
    i2c_master_read_from_device(I2C_MASTER_NUM, SHT85_SENSOR_ADDR, data, 6, pdMS_TO_TICKS(1000));

    uint16_t raw_temp = (data[0] << 8) | data[1];
    uint16_t raw_humidity = (data[3] << 8) | data[4];

    float temperature = -45 + 175 * ((float)raw_temp / 65535.0);
    float humidity = 100 * ((float)raw_humidity / 65535.0);

    printf("Temperature: %.2f °C, Humidity: %.2f %%\n", temperature, humidity);
}

void app_main() {
    ESP_ERROR_CHECK(i2c_master_init());

    while (1) {
        read_sht85_sensor();
        vTaskDelay(pdMS_TO_TICKS(2000));
    }
}

i2c:
  sda: GPIO21
  scl: GPIO22

sensor:
  - platform: sht3xd
    address: 0x44
    temperature:
      name: "Living Room Temperature"
    humidity:
      name: "Living Room Humidity"
    update_interval: 60s

[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
lib_deps =
    sensirion/arduino-sht @ ^1.2.6

#include <Arduino.h>
#include <Wire.h>
#include "SHTSensor.h"

SHTSensor sht;

void setup() {
  Wire.begin();
  Serial.begin(9600);
  if (sht.init()) {
    Serial.println("SHT85 sensor initialized successfully.");
  } else {
    Serial.println("Failed to initialize SHT85 sensor.");
  }
}

void loop() {
  if (sht.readSample()) {
    Serial.print("Temperature: ");
    Serial.print(sht.getTemperature(), 2);
    Serial.println(" °C");
    Serial.print("Humidity: ");
    Serial.print(sht.getHumidity(), 2);
    Serial.println(" %");
  } else {
    Serial.println("Failed to read data from SHT85 sensor.");
  }
  delay(2000);
}

from machine import I2C, Pin
from time import sleep

# Initialize I2C communication
i2c = I2C(0, scl=Pin(22), sda=Pin(21))

# SHT85 I2C address
SHT85_ADDR = 0x44

# Function to trigger measurement and read data
def read_sht85():
    i2c.writeto(SHT85_ADDR, b'\x24\x00')  # Trigger measurement
    sleep(0.015)  # Wait for measurement
    data = i2c.readfrom(SHT85_ADDR, 6)  # Read 6 bytes of data

    raw_temp = (data[0] << 8) | data[1]
    raw_hum = (data[3] << 8) | data[4]

    temperature = -45 + 175 * (raw_temp / 65535.0)
    humidity = 100 * (raw_hum / 65535.0)

    return temperature, humidity

while True:
    try:
        temp, hum = read_sht85()
        print("Temperature: {:.2f} °C".format(temp))
        print("Humidity: {:.2f} %".format(hum))
    except Exception as e:
        print("Error reading SHT85:", e)

    sleep(2)