GCS22.8.100.4.2.I is a version of GRINN (Generalized Register Interface Network Node), a library and set of tools for creating and managing heterogeneous networks of data processors (e.g., microcontrollers, PCs, single board computers, etc.). GCS22.8.100.4.2.I is a specific release of GRINN offering several bug fixes and improvements to the library, including better memory management and improved error handling. It also adds compatibility with the ARM Cortex-M3 processor, which is widely used in embedded systems. Additionally, this version of GRINN adds official support for the GNU GCC compiler.