> For the complete documentation index, see [llms.txt](https://sdk.twelite.info/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sdk.twelite.info/en/overview/sdk_structure.md).

# Structure of TWELITE SDK

### Chip library

* for TWELITE BLUE 
* for TWELITE RED

### toolchain

* GCC/MAKE/etc.

### Firmware programming tool

* TWE-Programmer (TWELITE firmware programming tool, for Windows)

### Application Sample Code

AppXXX is the application code. Please download the latest version of the application or the developing version from our [website](https://mono-wireless.com/jp/products/TWE-APPS/).

Samp\_XXX is a sample code. It is a sample code for simple sending and receiving, and handling peripherals such as I2C.