ESP32 BME680 Environmental Sensor

Code Examples

Below you can find code examples of BME680 Environmental Sensor with ESP32 in several frameworks:

• Arduino IDE
• ESP-IDF
• ESPHome
• PlatformIO
• MicroPython

ESP32 BME680 Arduino IDE Code Example

Example in Arduino IDE

Fill in your main Arduino IDE sketch file with the following code to use the BME680 Environmental Sensor:

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME680.h>

Adafruit_BME680 bme;

void setup() {
  Serial.begin(115200);
  if (!bme.begin(0x76)) {
    Serial.println("Could not find a valid BME680 sensor, check wiring!");
    while (1);
  }
  bme.setTemperatureOversampling(BME680_OS_8X);
  bme.setHumidityOversampling(BME680_OS_2X);
  bme.setPressureOversampling(BME680_OS_4X);
  bme.setGasHeater(320, 150); // 320*C for 150 ms
}

void loop() {
  if (!bme.performReading()) {
    Serial.println("Failed to perform reading :(");
    return;
  }
  Serial.print("Temperature = "); Serial.print(bme.temperature); Serial.println(" *C");
  Serial.print("Pressure = "); Serial.print(bme.pressure / 100.0); Serial.println(" hPa");
  Serial.print("Humidity = "); Serial.print(bme.humidity); Serial.println(" %");
  Serial.print("Gas = "); Serial.print(bme.gas_resistance / 1000.0); Serial.println(" KOhms");
  delay(2000);
}

This Arduino code initializes the BME680 sensor and configures it for temperature, humidity, pressure, and gas readings. Oversampling settings are used to improve data accuracy. The loop() function reads sensor data every two seconds and outputs the values to the Serial Monitor. The setGasHeater function configures the gas sensor for VOC detection.

Connect your ESP32 to your computer via a USB cable, Ensure the correct Board and Port are selected under Tools, Click the "Upload" button in the Arduino IDE to compile and upload the code to your ESP32.

ESP32 BME680 ESP-IDF Code Example

Example in Espressif IoT Framework (ESP-IDF)

If you're using ESP-IDF to work with the BME680 Environmental Sensor, here's how you can set it up and read data from the sensor. Fill in this code in the main ESP-IDF file:

#include "bme680.h"
#include "esp_log.h"

#define I2C_MASTER_SCL_IO 22
#define I2C_MASTER_SDA_IO 21
#define I2C_MASTER_FREQ_HZ 100000
#define BME680_ADDR 0x76

static const char *TAG = "BME680";

void app_main() {
    ESP_LOGI(TAG, "Initializing BME680...");

    bme680_dev dev;
    bme680_init(&dev, I2C_MASTER_SCL_IO, I2C_MASTER_SDA_IO, I2C_MASTER_FREQ_HZ, BME680_ADDR);

    while (1) {
        bme680_data data;
        bme680_read(&dev, &data);
        ESP_LOGI(TAG, "Temperature: %.2f°C", data.temperature);
        ESP_LOGI(TAG, "Pressure: %.2f hPa", data.pressure);
        ESP_LOGI(TAG, "Humidity: %.2f%%", data.humidity);
        ESP_LOGI(TAG, "Gas Resistance: %.2f KOhms", data.gas_resistance);
        vTaskDelay(2000 / portTICK_PERIOD_MS);
    }
}

This ESP-IDF code configures the ESP32 to interface with the BME680 sensor over I2C. The bme680_init function initializes the sensor. In the app_main() loop, the sensor's environmental data (temperature, pressure, humidity, and gas resistance) is read and logged to the console every two seconds.

Update the I2C pins (I2C_MASTER_SDA_IO and I2C_MASTER_SCL_IO) to match your ESP32 hardware setup, Use idf.py build to compile the project, Use idf.py flash to upload the code to your ESP32.

ESP32 BME680 ESPHome Code Example

Example in ESPHome (Home Assistant)

Fill in this configuration in your ESPHome YAML configuration file (example.yml) to integrate the BME680 Environmental Sensor

sensor:
  - platform: bme680
    temperature:
      name: "BME680 Temperature"
    pressure:
      name: "BME680 Pressure"
    humidity:
      name: "BME680 Humidity"
    gas_resistance:
      name: "BME680 Gas Resistance"
    address: 0x76

This ESPHome configuration integrates the BME680 sensor. It creates sensor entities for temperature, pressure, humidity, and gas resistance, which are monitored via the I2C address 0x76. The setup is ideal for home automation and IoT systems.

Upload this code to your ESP32 using the ESPHome dashboard or the esphome run command.

ESP32 BME680 PlatformIO Code Example

Example in PlatformIO Framework

For PlatformIO, make sure to configure the platformio.ini file with the appropriate environment and libraries, and then proceed with the code.

Configure platformio.ini

First, your platformio.ini should look like below. You might need to include some libraries as shown. Make sure to change the board to your ESP32:

[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
lib_deps = 
    adafruit/Adafruit BME680 Library
    wire
monitor_speed = 115200

ESP32 BME680 PlatformIO Example Code

Write this code in your PlatformIO project under the src/main.cpp file to use the BME680 Environmental Sensor:

#include <Wire.h>
#include "Adafruit_BME680.h"

Adafruit_BME680 bme;

void setup() {
  Serial.begin(115200);
  if (!bme.begin()) {
    Serial.println("Could not find a valid BME680 sensor, check wiring!");
    while (1);
  }
  bme.setTemperatureOversampling(BME680_OS_8X);
  bme.setHumidityOversampling(BME680_OS_2X);
  bme.setPressureOversampling(BME680_OS_4X);
  bme.setGasHeater(320, 150);
}

void loop() {
  if (bme.performReading()) {
    Serial.printf("Temp: %.2f*C, Pressure: %.2fhPa, Humidity: %.2f%%, Gas: %.2f KOhms\n",
                  bme.temperature, bme.pressure / 100.0, bme.humidity, bme.gas_resistance / 1000.0);
  }
  delay(2000);
}

This PlatformIO code integrates the Adafruit BME680 library for reading environmental data from the sensor. Temperature, humidity, pressure, and gas readings are fetched and printed to the Serial Monitor every two seconds.

Upload the code to your ESP32 using the PlatformIO "Upload" button in your IDE or the pio run --target upload command.

ESP32 BME680 MicroPython Code Example

Example in Micro Python Framework

Fill in this script in your MicroPython main.py file (main.py) to integrate the BME680 Environmental Sensor with your ESP32.

from machine import I2C, Pin
from bme680 import BME680_I2C

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

# Initialize BME680
bme = BME680_I2C(i2c=i2c)

while True:
    print(f"Temperature: {bme.temperature:.2f} °C")
    print(f"Pressure: {bme.pressure:.2f} hPa")
    print(f"Humidity: {bme.humidity:.2f} %")
    print(f"Gas: {bme.gas:.2f} KOhms")
    sleep(2)

This MicroPython code initializes the BME680 sensor using I2C. The sensor reads temperature, pressure, humidity, and gas values, which are printed to the console every two seconds.

Upload this code to your ESP32 using a MicroPython-compatible IDE, such as Thonny, uPyCraft, or tools like ampy.