Serial ports (UART) are a very commonly used interface in embedded systems, but most modern computers lack hardware serial ports. Generally, serial ports are expanded through methods like USB to serial or PCIe bus expansion. USB to serial is a very common solution. Common USB to serial chips include CH340/341, CP2102, and PL2302. However, these … Read more
How To Solve MacBook Not Recognizing Arduino Serial Port? Recently, I purchased a domestic Arduino basic learning kit, but encountered the issue of the MacBook not recognizing the Arduino serial port during usage. After extensive research, I have summarized the following experiences, hoping to help those who are similarly confused! Problem Analysis: Chip Determines Recognition … Read more
Background Recently, I needed to create an ESP32 board by myself. Considering cost and packaging, I planned to choose CH340E as the USB-to-serial chip. Generally, ESP8266/ESP32 boards have an automatic download circuit that allows users to enter download mode for firmware flashing without pressing a button. However, the automatic download circuit requires serial chip support … Read more