# Introduction (For NyBoard)

The Nyboard V1 used by robot uses the Atmel ATMEGA328P controller, which only supports only one serial port. We separate the serial port of Nyboard to support more modules. The pins of the serial port are compatible with the 6-pin Arduino Pro Mini. Pin definitions are shown in the table below:

| Pin No. | Name | Usage                                                           |
| ------- | ---- | --------------------------------------------------------------- |
| 1       | DTR  | Modem signal DTR, reset NyBoard after serial download finished. |
| 2       | RX   | ATMEGA328P RX (receive)                                         |
| 3       | TX   | ATMEGA328P TX (send)                                            |
| 4       | 5V   | 5V power for MCU and chips                                      |
| 5       | GND  | Ground                                                          |
| 6       | GND  | Ground                                                          |

The default serial baud rate is **115200bps**.

There're 3 communication modules for the NyBoard V1:

* [USB uploader](https://docs.petoi.com/communication-modules/usb-downloader-ch340c)
* [Bluetooth](https://docs.petoi.com/communication-modules/dual-mode-bluetooth) dual mode（EDR & BLE）JDY-23
* [WiFi module](https://docs.petoi.com/communication-modules/wifi-esp8266) ESP8266


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.petoi.com/communication-modules/introduction-for-nyboard.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.