ESP8266-Arduino编程实例-SHT40温湿度传感器驱动

SHT40温湿度传感器驱动

1、SHT40介绍

SHT40下一代 SHT 传感器，过去我们有过 SHt31 等传感器的示例。

SHT40 基于全新优化的 CMOSens® 芯片构建，可降低功耗并提高精度规格。 凭借 1.08 V 至 3.6 V 的扩展电源电压范围，它非常适合移动和电池驱动应用。

在这里插入图片描述

与早期的 SHT 传感器不同，该传感器具有真正的 I2C 接口，只需两根线（加上电源和地线！）即可轻松连接。

SHT40具有如下特性：

  • 尺寸： 1.5 x 1.5 x 0.5 mm3
  • 输出 I²C
  • 电源电压范围： 1.08 至 3.6 V
  • 能耗： 0.4µA（测量速率为 1 Hz）
  • 相对湿度工作范围： 0 – 100% RH
  • T工作范围： -40 至 +125°C（-40 至 +257°F）
  • 相对湿度响应时间： 6 秒 (tau63%)

2、硬件准备

  • ESP8266 NodeMCU开发板一块
  • SHT40传感器模块一个
  • 面板板一个
  • 杜邦线若干
  • 数据线一条

硬件接线如下：

传感器引脚 ESP8266开发板引脚
Vin 5v
Gnd Gnd
SCL D1
SDA D2

3、软件准备

  • Arduino IDE或VSCode + PlatformIO

在前面的文章中，对如何搭建ESP8266开发环境做了详细的介绍，请参考：

ESP8266 NodeMCU的引脚介绍在前面的文章中做了详细的介绍，请参考：

4、代码实现

本次使用的驱动库如下：

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#include "Adafruit\_SHT4x.h"
 
Adafruit_SHT4x sht4 = Adafruit\_SHT4x();
 
void setup() {
  Serial.begin(115200);
 
  while (!Serial)
    delay(10);     // will pause Zero, Leonardo, etc until serial console opens
 
  Serial.println("Adafruit SHT4x test");
  if (! sht4.begin()) {
    Serial.println("Couldn't find SHT4x");
    while (1) delay(1);
  }
  Serial.println("Found SHT4x sensor");
  Serial.print("Serial number 0x");
  Serial.println(sht4.readSerial(), HEX);
 
  // You can have 3 different precisions, higher precision takes longer
  sht4.setPrecision(SHT4X_HIGH_PRECISION);
  switch (sht4.getPrecision()) {
     case SHT4X_HIGH_PRECISION: 
       Serial.println("High precision");
       break;
     case SHT4X_MED_PRECISION: 
       Serial.println("Med precision");
       break;
     case SHT4X_LOW_PRECISION: 
       Serial.println("Low precision");
       break;
  }
 
  // You can have 6 different heater settings
  // higher heat and longer times uses more power
  // and reads will take longer too!
  sht4.setHeater(SHT4X_NO_HEATER);
  switch (sht4.getHeater()) {
     case SHT4X_NO_HEATER: 
       Serial.println("No heater");
       break;
     case SHT4X_HIGH_HEATER_1S: 
       Serial.println("High heat for 1 second");
       break;
     case SHT4X_HIGH_HEATER_100MS: 
       Serial.println("High heat for 0.1 second");
       break;
     case SHT4X_MED_HEATER_1S: 
       Serial.println("Medium heat for 1 second");
       break;
     case SHT4X_MED_HEATER_100MS: 
       Serial.println("Medium heat for 0.1 second");
       break;
     case SHT4X_LOW_HEATER_1S: 
       Serial.println("Low heat for 1 second");
       break;
     case SHT4X_LOW_HEATER_100MS: 
       Serial.println("Low heat for 0.1 second");
       break;
  }
 
}
 
 
void loop() {
  sensors\_event\_t humidity, temp;
 
  uint32\_t timestamp = millis();
  sht4.getEvent(&humidity, &temp);// populate temp and humidity objects with fresh data
  timestamp = millis() - timestamp;
 
  Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println(" degrees C");
  Serial.print("Humidity: "); Serial.print(humidity.relative_humidity); Serial.println("% rH");
 
  Serial.print("Read duration (ms): ");
  Serial.println(timestamp);
 
  delay(1000);
}

文章来源: https://iotsmart.blog.csdn.net/article/details/126957631