The serial port sends data in long type, four bytes, ranging from 0x00 to 0x7fffffff. Each time 1 byte is sent, for example, 0x7abcdeff, the first time 7a is sent, the second time bc is sent, the thir
RS-485 Overview : https://training.eeworld.com.cn/course/5277This training video provides an overview of the RS-485 standard.We will go through the basics of RS-485, the benefits and the reasons to ch
The air purifier I made in college has relatively simple functions: automatic and manual. The motor speed is mainly controlled by PWM. Here are some programs for reference only. #include
#define keyin