Introduction - If you have any usage issues, please Google them yourself
Document list and description: AT_Document_FULL_20100208.pdf module AT command set supported by documentation EVB of MD231D-V4.0.pdf MD231 Development Board Reference Schematic How to download OPENAT to MD.pdf BIN file download user documentation and software upgrades M231_V01. 03_EN_090831.pdf MD231 datasheet OPENAT_USER_MANUAL_V03.0.0_EN.pdf OPENAT users to develop manuals, including instructions OPENAT_V3.2_ api Getting Started Guide (Chinese Version). pdf OPENAT Start Guide MD231 modules using manual. pdf help customers better use of the modules MD231 to the standard AT command module as a reference