编程

Before we start, let’s briefly understand the basic concepts. I can roughly summarize them into the following points What is Web3.0 and what does it have to do with blockchain? (The article last time will come in handy) Requirements: Develop a Python-based Web 3.0 image uploading system. This system will allow users to upload images and store them on a decentralized network, while recording transaction information on the blockchain. I originally wrote it for fun, but I thought about writing it into a user authentication file operation that integrates a full set of management, so that it “will eventually become the ultimate solution for image upload services.” But in practice, I found that it was not very practical, so I gave up. However, I have always been so obsessed with pictures. ...

Hey, I’m back as I promised to write the esp8266 development board firmware myself. I made a promise 20 years ago, and today I came back to fulfill my wish ESP8266 serial WiFi module - WiFi killer Today we also connected the OLED display. The one I bought this time is a 4-pin OLED (128*64), which does not support color display. NodeMCU Development Board NodeMCU is an open source IoT hardware development board. Because it supports WIFI function and its usage is very similar to the Arduino development board, it has gained the favor of more and more maker friends from all over the world in recent years. NodeMCU is similar in size to Arduino Nano. It is not developed by the Arduino team, but we can also use the Arduino IDE to develop it. ...