IDURAR is a free, open-source ERP and CRM application built on the MERN stack (MongoDB, Express.js, React.js, Node.js) with Ant Design and Redux. It provides modules for invoice management, payment processing, quote generation, customer relationship management, inventory tracking, and financial reporting. The system features multi-language support (44 languages), PDF generation for business documents, role-based access control, and a responsive user interface. The architecture separates concerns with a RESTful API backend and a modular frontend utilizing React, Redux for state management, and Ant Design for UI components.
This repository is a comprehensive bare-metal microcontroller programming guide, providing step-by-step examples from minimal firmware to a full embedded web server with a device dashboard. The code targets ARM Cortex-M and RISC-V microcontrollers (STM32, TI TM4C, RP2040, ESP32-C3, nRF52840, etc.) and uses only GCC, a datasheet, and the Mongoose networking library. The architecture is bare-metal, single-threaded with an event loop in the webserver step; it demonstrates direct register manipulation, interrupt handling, UART, SysTick, clock configuration, printf retargeting via newlib syscalls, CMSIS integration, and Ethernet with built-in TCP/IP (MIP). The repository also includes reusable project templates for blinky, CLI, and LittleFS filesystem. Despite being educational, the code is production-quality and follows embedded best practices such as non-blocking timers, hardware abstraction layers (hal.h), and modular startup code.