-To help users get started with the [CodeLess™ AT commands](https://www.renesas.com/us/en/software-tool/smartbond-codeless-commands) for the DA14531MOD Bluetooth module, we have provided an `SerialPassthrough` example in our [*unofficial* Arduino library](../software_overview-arduino/#da14531mod-ble-module). Once programmed on the RA6M5 Thing Plus, the example allows users to directly interface with the DA14531MOD's UART port through the board's USB connection using a [serial terminal](https://learn.sparkfun.com/tutorials/112). Thereby, enabling users to experiment with the CodeLess AT commands and develop their own BLE connectivity solution. Users can find this sketch in the **File** > **Examples** > **SparkFun Renesas Codeless BLE** > **SerialPassthrough** drop-down menu.
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