ESP32发送温湿度信息邮件教程

ESP32发送温湿度信息邮件教程

引用

CSDN

1.

https://m.blog.csdn.net/zcz20053550/article/details/145734155

本文将介绍如何使用ESP32读取DHT11传感器的温湿度数据，并通过SMTP协议将数据发送到指定邮箱。

一、简介

1.背景知识

ESP32通过SMTP协议在发送端邮箱请求发送权限，然后将DHT11收集到的温湿度信息，周期性的发送到接收端的邮箱。

SMTP（Simple Mail Transfer Protocol）即简单邮件传输协议，是一组用于从源地址到目的地址传输邮件的规范。SMTP服务器遵循SMTP协议，帮助每台计算机在发送或中转信件时找到下一个目的地。SMTP认证要求必须在提供了账户名和密码之后才可以登录SMTP服务器，以防止垃圾邮件的传播。

二、使用步骤

1、程序代码

#include <Arduino.h>
#include <HTTPClient.h>
#include <DHT.h>
#include <WiFi.h>

// WiF主网络名称(SSID)
const char* ssid ="your_ssid";
// WiFi网络密码
const char* password = "your_password";
//定义DHT22传感器连接的引脚
#define DHTPIN 4
//传感器类型定义为DHT11
#define DHTTYPE DHT11
//创建DHT对象用于操作传感器
DHT dht(DHTPIN, DHTTYPE);
//发件人的相关SMTP邮箱配置，需替换为实际值
String smtpEmail ="your_email@example.com";
const char* smtpCode="your_smtp_code";
const char* smtpCodeType="your_smtp_type";

// 连接WiFi网络
void connectWiFi()
{
    Serial.println("Connecting to WiFi...");
    WiFi.begin(ssid,password);
    while(WiFi.status()!=WL_CONNECTED)
    {
        //通过循环不断检测是否连接成功
        delay(500);
        Serial.print(".");
    }
    Serial.println("Connected to WiFi");
}

//发送邮件的函数，收件人，标腿，主题，内容
void sendEmailMessage(String recipient, String fromTitle, String subject,String messageContent)
{
    if(WiFi.status() != WL_CONNECTED)
    {
        //首先检查WiFi是否已经连接、如果没
        Serial.println("WiFi not connected");
        return;
    }
    HTTPClient http;
    //构建POST请求的数据，拼接各项参数,创建一个HTTPClient对象，用于后续发送
    String postPayload = "ColaKey=ZNDuFY8bBPgJuk173993795133902c8m9wMIS&tomail=" + recipient + "&fromTitle=" + fromTitle + "&subject=" + subject + "&content=" + messageContent + "&smtpCode=" + smtpCode + "&smtpEmail=" + smtpEmail + "&smtpCodeType=" + smtpCodeType + "&isTextContent=true";
    //开始连接指定的邮件发送服务URL
    http.begin("https://luckycola.com.cn/tools/customMail");
    //设置请求头，指定内容类型为表单数据格式,为了让邮件发送服务能正确解析接收
    http.addHeader("Content-Type","application/x-www-form-urlencoded");
    //发送POST请求
    int responseCode = http.POST(postPayload);
    http.end();
}

void setup()
{
    Serial.begin(115200);
    dht.begin();
    connectWiFi();
}

void loop()
{
    float temperature = dht.readTemperature(); 
    float humidity    = dht.readHumidity();
    if(isnan(temperature)||isnan(humidity))
    {
        Serial.println("FAIL to read Humidity Temperature");
        return;		
    }
    String mailContent = "Temperature:"+String(temperature)+"℃,Humidity:"+String(humidity)+"%";
    //接收邮箱、标题、主题、内容
    sendEmailMessage("recipient_email@example.com","esp32 data","environment",mailContent);
    delay(600000);  //发送间隔
}

2.串口输出

正在执行任务: C:\Users\zuo\.platformio\penv\Scripts\platformio.exe device monitor 
--- Terminal on COM9 | 115200 8-N-1
--- Available filters and text transformations: colorize, debug, default, direct, esp32_exception_decoder, hexlify, log2file, nocontrol, printable, send_on_enter, time
--- More details at https://bit.ly/pio-monitor-filters
--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H
ets Jul 29 2019 12:21:46
rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1184
load:0x40078000,len:13232
load:0x40080400,len:3028
entry 0x400805e4
Connecting to WiFi...
.Connected to WiFi