Use your Android phone as a microphone for your PC

An FPGA-based USB 1.1 (full-speed) device core to implement USB-serial, USB-camera, USB-audio, USB-hid, etc. It requires only 3 FPGA common IOs rather than additional chips. 基于FPGA的USB 1.1 (full-speed) device端控制器，可实现USB串口、USB摄像头、USB音频、U盘、USB键盘等设备，只需要3个FPGA普通IO，而不需要额外的接口芯片。

Serial Port Programming in C++

Panic Playdate reverse-engineering notes/tools - covers file formats, server API and USB commands

DMA-accelerated multi-UART USB CDC for STM32F072 microcontroller

Samsung modem commands over USB serial connection and secret dialer codes extracted from system packages

USB serial device (CDC-ACM)

Arduino LANC to USB with GUI

Android Telephony, RIL, Radio of Modem module

A serial port class, for interfacing between Macs and microcontrollers. Works over USB serial.

The most complete Python library to interface with MCP2221(A).

A notifier that forward your sms from chip sim800c.

Allows USB printing to Panasonic KX-R/RK-T/RK-H typewriters, KX-W word processors, and KX-W55 printer. Emulates KX-R60 (working) and RP-K100/RP-K105 (in development) interface adapters

Talk to a USB serial device without OS drivers!

Virtual Serial Port (via USB-IP) to TCP Socket

Tutorials and example code for SAMD21 and SAMD51 microcontrollers

Local-first tool for flashing custom boot logos to Baofeng radios via USB serial, with CLI and optional Streamlit UI.

Home Assistant integration for reading Rad Pro devices over USB serial

USB-UART-BRIDGE & ESP programmer featuring tag-connect

Isolated USB to Serial/RS232/RS485 converter with ESD protected input/outputs.