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Course Elementary 2711

Course Introduction：This course aims to teach the comprehensive process of Internet of Things development, from project introduction, hardware construction, server construction, API interface development, to the development and implementation query of Web and APP. Through this course, students will learn how to build an IoT system, including the connection of sensors and devices, data transmission and processing, as well as the development and implementation of query functions on the Web and APP. This course will help students master the key steps and skills of IoT development and lay a solid foundation for their learning and career development in the field of IoT.

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Internet of Things NS construction

Project requirements: gateway node, server, loraWAN transmission. Project requirements: gateway node, server, loraWAN transmission. Project requirements: gateway node, server, loraWAN transmission. Project requirements: gateway node, server, loraWAN transmission.

2019-01-08 15:32:21

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

2023-09-05 15:06:32

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IoT technology in PHP

Course Introduction：With the popularity and development of IoT technology, more and more companies are beginning to pay attention to the application and research of IoT technology. As a language widely used in Web development, PHP can also well support the development of Internet of Things technology. This article will introduce the IoT technology in PHP, including the concept of IoT technology, the application and advantages of PHP in IoT technology, and how to use PHP for IoT development. 1. Overview of Internet of Things Technology Internet of Things technology is a technology that connects and interacts with physical devices and the Internet. It can

2023-05-27 comment 0 1786

How to participate in exclusive Helium IOT (IOT) airdrop events

Course Introduction：Helium IOT airdrops are a great way to get free Helium IOT tokens, and DappRadar makes the process straightforward and accessible. Here’s a step-by-step gu...

2024-06-27 comment 0 652

How to write IoT applications using PHP

Course Introduction：With the continuous development of IoT technology, more and more enterprises and individuals are beginning to use IoT technology to achieve intelligent management. As a popular server-side scripting language, PHP can easily interact with IoT devices and provides a lot of convenience for the development of IoT applications. This article will introduce how to use PHP to write IoT applications, including communicating with IoT devices, processing IoT data, and developing IoT controllers. 1. Communicate with IoT devices Communicating with IoT devices is an IoT application

2023-05-27 comment 0 1129

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