IoT uplink data processing based on LwIP
Process IoT upload data
LwIP
LwIP, the Light Weight IP protocol, can be run without operating system or RTOS. The resource occupation is only tens of KB RAM and 40KB ROM. it is suitable for running in embedded devices. Now general Internet of things devices are using LwIP protocol. Its basic functions are as follows:
Support multi network port ...
Posted by madcat on Wed, 10 Nov 2021 21:42:58 -0800
WebView common Crash analysis and Solutions
1 Preface Unexpected flash back of App is called crash. Crash rate is an important indicator to measure the stability of App. The stability of App will not only affect the use experience, but even cause the loss of users. Because there are many reasons and types that lead to App Crash, an article cannot be explained clearly, nor is it the focu ...
Posted by enemeth on Wed, 10 Nov 2021 21:38:39 -0800
Python knowledge notes (+ 4): understand the concepts of list, tuple and string
Recently, I encountered some basic concepts that I didn't understand very well when I was brushing Leetcode questions, so I need to supplement the basic knowledge. Therefore, the following are some basic concepts about List, Tuple and String that I summarized after consulting the materials.
Understanding sequences (lists, tuples, and strings) ...
Posted by dhydrated on Wed, 10 Nov 2021 21:36:05 -0800
session, simple usage of filter, file upload
1. Open eclipse to establish a dynamic website
2. Create a new index.html under WebContent and modify the access path
(1) Normally, you need to add an html name, such as http://localhost:8080/index.html To access the page, now want to http://localhost:8080 Direct access
(2) Write code in html
<!DOCTYPE html>
<html>
< ...
Posted by s4salman on Wed, 10 Nov 2021 21:29:06 -0800
C + +: introduction to operator overloading
preface
1. Operator overloading is a form of C + + polymorphism. 2. Overloading operators can make the code look more natural.
Review class
During normal class construction, some member methods may not need to be written. For example, in such a class representing time, the copy constructor is only a shallow copy, which is the same as the ...
Posted by lovelyvik293 on Wed, 10 Nov 2021 21:23:17 -0800
Comprehensive and thorough analysis of factory method mode
This article is excerpted from "design patterns should be learned this way"
1. Application scenario of factory method mode
The factory method mode is mainly applicable to the following application scenarios.
(1) Creating objects requires a lot of repetitive code.
(2) The client (application layer) does not depend on the details of ho ...
Posted by oldtimer on Wed, 10 Nov 2021 21:15:18 -0800
Class loader subsystem
Parsing the. Class file javap -v xxxxx.class
Or IDEA to install the jclasslib plug-in
Class loader subsystem
Class loader and loading process
The class loader subsystem is responsible for loading class files from the file system or network. Class files have a specific file ID at the beginning of the fileClassLoader is only responsible for l ...
Posted by HK2ALL on Wed, 10 Nov 2021 21:10:04 -0800
From environment construction to recurrent neural network case, take you to master Keras
Abstract: as an advanced package of neural network, Keras can quickly build neural network. It has very wide compatibility and is compatible with TensorFlow and Theano.
This article is shared from Huawei cloud community< [Python artificial intelligence] XVI. Keras environment construction, introduction foundation and case of recurrent neu ...
Posted by kwong on Wed, 10 Nov 2021 21:09:12 -0800
Vue learning notes (2021.11.9 ~ 11.10)
Vue
Only focus on layers: HTML+CSS+JS
Network communication: axios
Page Jump: Vue router
Status management: vuex
Vue-UI: ice.work
Front end UI framework
bootstrap
Ant-Design
ElementUI,iview,ice
AmazeUI
management tool
npm: similar to maven
1, Hello Vue
Develop using IDEA
Create new HTML and add cdn
<script src="https://cdn.jsdelivr.n ...
Posted by renu on Wed, 10 Nov 2021 21:00:24 -0800
CSS drawing and data storage principle
1.1 simple JavaScript
1.1.1 what is JavaScript
At the beginning of design, JavaScript is a scripting language that can be embedded in web pages. Its main function is to create web page special effects on the web. Dynamic applications implemented using JavaScript scripting language can be seen everywhere on Web pages.
For example, verify ...
Posted by php3ch0 on Wed, 10 Nov 2021 20:40:09 -0800