Key Knowledge Points in Chapter One: Understand the characteristics, classifications, development, and applications of embedded systems, and familiarize yourself with the logical components of embedded systems. Understand the main types of embedded processing chips, be familiar with the SoC development process, and understand the significance of IP cores. Be familiar with the encoding of Chinese … Read more
Limit bandwidth for specific IP addresses in OpenWrt 1. Script for limiting bandwidth Use a custom script to limit the bandwidth for specific IP addresses or address ranges for connected devices. # !/bin/sh # Define incoming and outgoing interfaces (IDEV for internal network interface, ODEV for external network interface) IDEV=”tunAcc” ODEV=”br-wan” # Define total upstream … Read more
What is OpenWrt? OpenWrt is commonly found in third-party firmware for wireless routers (soft routers). It is an efficient, reliable, and feature-rich router firmware. OpenWrt can be described as an embedded Linux distribution. (The mainstream router firmware includes dd-wrt, tomato, openwrt, and padavan.) Compared to a single, static system, OpenWrt’s package management provides a fully … Read more