【免费】ESP32-硬件IIC读取温湿度传感器SHT30_esp32温湿度计,esp32温湿度传感器资源-CSDN文库

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mk：2个

需积分: 0 79 浏览量 2023-05-01 18:40:36 上传评论 1 收藏 21KB ZIP 举报

ESP32是一款功能强大的微控制器，广泛应用于物联网（IoT）和嵌入式系统中，其集成的硬件I2C接口使得与各种外围设备通信变得简单。本篇将重点介绍如何利用ESP32通过硬件I2C接口读取SHT30温湿度传感器的数据。 SHT30是一款高精度、低功耗的温湿度传感器，由瑞士公司Sensirion制造。它能够提供精确的温度和湿度测量值，并且具有快速响应时间和串行数字接口，非常适合在物联网设备和智能家居中使用。硬件I2C（Inter-Integrated Circuit）是一种多主控通信协议，允许多个设备共享同一组线路进行双向通信。在ESP32上，硬件I2C接口通常使用GPIO21（SDA）和GPIO22（SCL）引脚。你需要在代码中配置这些引脚为I2C模式，并设置I2C的时钟速度，例如400kHz。在连接SHT30到ESP32之前，确保它们的电源和接地引脚正确连接，SHT30的SDA和SCL引脚分别连接到ESP32的对应引脚。SHT30的I2C地址是0x44（7位）。一旦硬件连接完成，就可以开始编写读取数据的软件代码。以下是一段基本的ESP32读取SHT30数据的代码框架： ```cpp #include <Wire.h> #include "sht30.h" SHT30 sht; void setup() { Wire.begin(); // 初始化I2C Serial.begin(115200); while (!Serial) {} // 等待串口初始化完成 if (sht.begin()) { // 初始化SHT30 Serial.println("SHT30 初始化成功！"); } else { Serial.println("无法初始化SHT30！"); } } void loop() { float temp, humidity; if (sht.readTempHumidity(&temp, &humidity)) { Serial.print("温度: "); Serial.print(temp, 1); Serial.println(" °C"); Serial.print("湿度: "); Serial.print(humidity, 1); Serial.println("%"); delay(2000); // 设置间隔时间，避免过于频繁的读取 } else { Serial.println("读取失败！"); } } ``` 在这个示例中，我们使用了`Wire`库来处理I2C通信，并且引入了SHT30的库文件`sht30.h`。`sht.begin()`函数用于初始化传感器，而`sht.readTempHumidity()`则用于读取温度和湿度数据。读取到的数据会打印到串口监视器上。值得注意的是，为了更有效地使用I2C，需要正确处理可能发生的通信错误，例如超时或数据校验失败。此外，SHT30支持多种测量模式，如单次测量、连续测量以及低功耗模式，可以根据实际应用需求选择合适的模式。总结，通过ESP32的硬件I2C接口与SHT30温湿度传感器交互，可以实现高效、准确的环境参数监测。在编写代码时，不仅要关注硬件连接的正确性，还要理解和掌握I2C通信协议以及传感器的特定命令和数据格式。通过不断优化和调试，你可以构建出稳定可靠的温湿度监测系统。

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i2c_simple.zip （15个子文件）

i2c_simple

CMakeLists.txt 428B

Makefile 181B

.devcontainer

devcontainer.json 1KB

Dockerfile 1KB

sdkconfig 42KB

components

sht3x

include

i2c_sht3x.h 2KB

CMakeLists.txt 127B

component.mk 87B

src

i2c_sht3x.c 7KB

main

CMakeLists.txt 86B

component.mk 74B

Kconfig.projbuild 519B

i2c_simple_main.c 4KB

dependencies.lock 211B

README.md 2KB

# I2C Simple Example (See the README.md file in the upper level 'examples' directory for more information about examples.) ## Overview This example demonstrates basic usage of I2C driver by reading and writing from a I2C connected sensor: If you have a new I2C application to go (for example, read the temperature data from external sensor with I2C interface), try this as a basic template, then add your own code. ## How to use example ### Hardware Required To run this example, you should have one ESP32, ESP32-S or ESP32-C based development board as well as a MPU9250. MPU9250 is a inertial measurement unit, which contains a accelerometer, gyroscope as well as a magnetometer, for more information about it, you can read the [PDF](https://invensense.tdk.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf) of this sensor. #### Pin Assignment: **Note:** The following pin assignments are used by default, you can change these in the `menuconfig` . | | SDA | SCL | | ---------------- | -------------- | -------------- | | ESP I2C Master | I2C_MASTER_SDA | I2C_MASTER_SCL | | MPU9250 Sensor | SDA | SCL | For the actual default value of `I2C_MASTER_SDA` and `I2C_MASTER_SCL` see `Example Configuration` in `menuconfig`. **Note: ** There’s no need to add an external pull-up resistors for SDA/SCL pin, because the driver will enable the internal pull-up resistors. ### Build and Flash Enter `idf.py -p PORT flash monitor` to build, flash and monitor the project. (To exit the serial monitor, type ``Ctrl-]``.) See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html) for full steps to configure and use ESP-IDF to build projects. ## Example Output ```bash I (328) i2c-simple-example: I2C initialized successfully I (338) i2c-simple-example: WHO_AM_I = 71 I (338) i2c-simple-example: I2C unitialized successfully ``` ## Troubleshooting (For any technical queries, please open an [issue](https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you as soon as possible.)

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