B4R vs CS+

B4R is a free Windows development tool for creating native programs for Arduino-compatible boards, ESP8266, and ESP32. Its plan costs nothing and permits commercial use. The product page lists a modern IDE, connectivity options, and an Arduino–Android Bluetooth Low Energy example. Integrated flashing is available, but integrated debugging is not. Setup requires Arduino IDE v2, Arduino CLI, and Java; OpenJDK 14 is listed when Java is not already installed. Users configure paths to arduino-cli.exe and javac, then choose a board type and serial port in the Board Selector. C source code and generated compiled objects appear in the Objects folder. B4R libraries are open source under the MIT license. The product page links learning resources, example projects, tutorials, and a forum. Anywhere Software directs technical questions to its forum and says email inquiries receive answers within 24 hours. The maker identifies Erel Uziel as founder and CEO and says it has specialized in mobile development since 2005.

CS+ is Renesas’s integrated development environment for creating software for Renesas microcontrollers. The free IDE is available for development and production, while evaluation compiler packages may impose limits. CS+ for CC targets the RL78, RH850, and RX families; CS+ for CA,CX targets RL78, 78K, and V850. Its installer includes compiler packages for target products, and compatible Renesas emulators provide debugging functions. The graphical interface can generate C device-driver programs for MCU peripherals, although generation is unavailable for some MCUs. Modified or saved source files build automatically in the background, and action events can show variable values at a specified address. Smart Browser for CS+ for CC presents device information, hardware manual content, sample code, and related FAQs. CS+ can interoperate with Smart Configurator for RX, and Renesas offers a co-simulation tool linking it with MATLAB and Simulink. Current listed versions run on Windows 10 64-bit and Windows 11; 32-bit use requires CS+ IDE V8.06 or earlier. Debugging emulators are sold separately.