Springboot java introduces Mqtt to receive and send messages under the framework of the front and back separation version

This is just one of them, and it is a superficial method of receiving and sending messages. The synchronization mechanism needs to be communicated and confirmed with colleagues engaged in the Internet of Things to see if it can be implemented. Or if there are many devices, the synchronization mechanism will not be used. First, […]

How to use ESP8266 and DHT11 to collect indoor temperature and humidity and send them to the server program through WIFI

Have you ever thought about implementing your own indoor temperature and humidity detection system? I used the weekend to accomplish this small goal. I used ESP8266 and DHT11, and sent the collected data to the server program through WIFI and stored it in a SQLite database. In the following introduction, I will share with you […]

Python automatically sends emails

A recent project at work has the need to automatically send some information emails to a specified mailbox. So how to use Python to implement the function of automatically sending emails? Let’s talk about it briefly next. Python SMTP sends email SMTP (Simple Mail Transfer Protocol) is a simple mail transfer protocol. To put it […]

stm32 dual machine (f1 and f4) serial communication sends multi-byte symbol number

When I looked for serial port communication information on the Internet, most of it was communication between the host computer and the board. I rarely saw communication between two computers. I will record my thoughts in this article and hope it will be helpful. Interface connection: Select serial port one for f103, select serial port […]

cc1310 wireless sending and receiving status switching

Regarding the wireless sending and receiving status switching of cc1310, friends who are just getting in touch with it also have some doubts. I’ll make a personal note, hoping I won’t forget it in the future: 1. Complete the wireless configuration (be sure to understand this structure) //! Proprietary Mode Transmit Command struct __RFC_STRUCT rfc_CMD_PROP_RX_s […]

22. W5100S/W5500+RP2040 Raspberry Pi Pico<SMTP Send Email>

Article directory 1 Introduction 2 Introduction 2.1 What is SMTP? 2.2 How does SMTP work? 2.3 SMTP, IMAP and POP3 2.4 SMTP application scenarios 3 WIZnet Ethernet chip 4 Overview and usage of SMTP email sending examples 4.1 Flowchart 4.2 Core preparation work 4.3 Connection method 4.4 Main code overview 4.5 Results demonstration 5 things […]

[node+JS] The front end uses nodemailer to send emails

Preface Email configuration Complete code Foreword Recently, it is necessary to realize that after the customer submits the form, the content of the form is sent to the corresponding mailbox as an email. The front-end sends it directly without going through the back-end service. Hiss–, just do it! After searching, there are many ways to […]

Various ways to send http requests in java

Native java sends http request package com.cyz; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; /** * @author cyz * @since 2023/11/8 9:50 */ public class CustHttp { public static String post(String targetUrl, String params) throws IOException { URL url = new URL(targetUrl); PrintWriter out = null; […]