# The Arduino Compatible for STM32G474 Nucleo development board
English | [中文](https://github.com/kurisaW/rt-thread/blob/g474_rtdu/bsp/stm32/stm32g474-st-nucleo/applications/arduino_pinout/README_zh.md)
## 1 RTduino - Arduino Ecosystem Compatibility Layer for RT-Thread
The STM32G474 Nucleo development board has been fully adapted with the [RTduino software package](https://github.com/RTduino/RTduino), which is an Arduino Ecosystem compatibility layer for RT-Thread. Users can program this BSP according to Arduino programming conventions and use a large number of libraries available in the Arduino community, providing a significant enhancement to the RT-Thread ecosystem. For more information, please refer to the [RTduino software package documentation](https://github.com/RTduino/RTduino).
### 1.1 How to Enable Arduino Ecosystem Compatibility Layer for this BSP
Enter the menuconfig command under Env tool or select RT-Thread Settings under RT-Thread Studio IDE:
```Kconfig
Hardware Drivers Config --->
Onboard Peripheral Drivers --->
[*] Compatible with Arduino Ecosystem (RTduino)
```
## 2 Arduino Pinout
For additional information on pin layout, refer to [pins_arduino.c](pins_arduino.c) and [pins_arduino.h](pins_arduino.h).
| 23 (A6) | -- | | On-chip reference voltage ADC, default controlled by RT-Thread's ADC device framework adc1 |
| 24 (A7) | -- | | On-chip temperature sensor ADC, default controlled by RT-Thread's ADC device framework adc1 |
> Notice:
> On Nucleo 64-pins boards, the D0 and D1 pins are not available per default as they are used by the STLink Virtual Comm Port (used for printf for example).
>
>If you want to use these pins (instead of the default Virtual Comm Port) you need to close SB62/SB63 and open SB13/SB14 solder bridges.
