nanoFramework.Iot.Device.Bmxx80 1.2.613

BMP280/BME280/BME680 设备系列

BMxx80 是一个能够感应温度、气压、海拔、湿度和 VOC 气体的设备系列。

可以使用 SPI 和 I2C 与设备通信（目前仅实现了 I2C）。

文档

实现支持以下设备

• BMP280 温度和气压传感器 (数据表)
• BME280 温度、气压和湿度传感器 (数据表)
• BME680 温度、气压、湿度和 VOC 气体传感器 (数据表)

用法

BME280

重要：在创建 I2cDevice 之前，请确保您已正确设置 I2C 引脚，尤其是在 ESP32 上，确保已安装 nanoFramework.Hardware.ESP32 nuget。

//////////////////////////////////////////////////////////////////////
// when connecting to an ESP32 device, need to configure the I2C GPIOs
// used for the bus
Configuration.SetPinFunction(21, DeviceFunction.I2C1_DATA);
Configuration.SetPinFunction(22, DeviceFunction.I2C1_CLOCK);

对于其他设备，如 STM32，请确保您正在使用您要使用的 I2C 总线的预设引脚。

// bus id on the MCU
const int busId = 1;
I2cConnectionSettings i2cSettings = new(busId, Bme280.DefaultI2cAddress);
using I2cDevice i2cDevice = I2cDevice.Create(i2cSettings);
using Bme280 bme80 = new Bme280(i2cDevice)
{
    // set higher sampling
    TemperatureSampling = Sampling.LowPower,
    PressureSampling = Sampling.UltraHighResolution,
    HumiditySampling = Sampling.Standard,

};

// Perform a synchronous measurement
var readResult = bme80.Read();

// Note that if you already have the pressure value and the temperature, you could also calculate altitude by using
// var altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue) which would be more performant.
bme80.TryReadAltitude(defaultSeaLevelPressure, out var altValue);

Debug.WriteLine($"Temperature: {readResult.Temperature?.DegreesCelsius:0.#}\u00B0C");
Debug.WriteLine($"Pressure: {readResult.Pressure?.Hectopascals:0.##}hPa");
Debug.WriteLine($"Altitude: {altValue.Meters:0.##}m");
Debug.WriteLine($"Relative humidity: {readResult.Humidity?.Percent:0.#}%");

BMP680

// The I2C bus ID on the MCU
const int busId = 1;

I2cConnectionSettings i2cSettings = new(busId, Bme680.DefaultI2cAddress);
I2cDevice i2cDevice = I2cDevice.Create(i2cSettings);

using Bme680 bme680 = new Bme680(i2cDevice, Temperature.FromDegreesCelsius(20.0));

// reset will change settings back to default
bme680.Reset();

// Perform a synchronous measurement
var readResult = bme680.Read();

// Print out the measured data
Debug.WriteLine($"Gas resistance: {readResult.GasResistance?.Ohms:0.##}Ohm");
Debug.WriteLine($"Temperature: {readResult.Temperature?.DegreesCelsius:0.#}\u00B0C");
Debug.WriteLine($"Pressure: {readResult.Pressure?.Hectopascals:0.##}hPa");
Debug.WriteLine($"Relative humidity: {readResult.Humidity?.Percent:0.#}%");

BMP280

// bus id on the MCU
const int busId = 1;

I2cConnectionSettings i2cSettings = new(busId, Bmp280.DefaultI2cAddress);
I2cDevice i2cDevice = I2cDevice.Create(i2cSettings);
using var i2CBmp280 = new Bmp280(i2cDevice);

// set higher sampling
i2CBmp280.TemperatureSampling = Sampling.LowPower;
i2CBmp280.PressureSampling = Sampling.UltraHighResolution;

// Perform a synchronous measurement
var readResult = i2CBmp280.Read();

// Print out the measured data
Debug.WriteLine($"Temperature: {readResult.Temperature?.DegreesCelsius:0.#}\u00B0C");
Debug.WriteLine($"Pressure: {readResult.Pressure?.Hectopascals:0.##}hPa");

此外，您还可以在 示例 文件夹中找到3个如何使用此设备绑定的示例。

以下Fritzing图示说明了如何使用I2C将BMP280与ESP32等MCU连接的示例。

概述

I2C

连接类型

此绑定支持以下连接类型。

• I2C
• SPI