# 02-Quick\_Start\_Guide

This guide aims to help users quickly get started with the motherboard, covering power-on, display connection, debug serial port, ADB, SSH connections, and more.

## Powering On the Board

### Power Supply Methods

The K4B supports TYPE-C 5V power supply, as shown below:

![image-20250520101200428](http://tanzhtanzh.oss-cn-shenzhen.aliyuncs.com/img/image-20250520101200428.png)

### LED Status

The development board is equipped with two LEDs. By default:

* **Green LED**: Power indicator (remains lit when powered on).
* **Blue LED**: Heartbeat indicator (blinks continuously after the kernel boots).

**Troubleshooting**:

* If the power indicator is off, check the power supply.
* If the heartbeat indicator does not blink, the system may be malfunctioning.

## Display

The motherboard supports **LVDS** and **MIPI** displays.

* The default system is configured for a **7-inch LVDS screen**. To switch to other displays, burn the corresponding image by following [Image Burning](https://github.com/tan-zhihao1/kickpi-book/blob/master/t113-s3/en/03-%E9%95%9C%E5%83%8F%E7%83%A7%E5%BD%95/README.md).

**Important**: Always power off the motherboard before connecting a display.

### Supported MIPI Displays

| **Model**   | **Size**  | **Resolution** | **Touch Support** |
| ----------- | --------- | -------------- | ----------------- |
| AT101DS40I  | 10.1-inch | 800x1280       | Y                 |
| MX101BA1340 | 10.1-inch | 800x1280       | Y                 |
| MX080B2140  | 8.0-inch  | 800x1280       | Y                 |
| F050008M01  | 5.0-inch  | 720x1280       | Y                 |

### Supported LVDS Resolutions

| **Resolution** | **Touch Support** |
| -------------- | ----------------- |
| 1024x600       | Y                 |

**Included 7-inch LVDS Screen**:

* Model: MX070IBC

**Hardware Wiring**:\
![image-20250520101443135](http://tanzhtanzh.oss-cn-shenzhen.aliyuncs.com/img/image-20250520101443135.png)

## Debug Serial Port

### Baud Rate

Set the debug serial port baud rate to **115200**.

### Debug Cable Description

The provided debug cable has four wires:

* **Red**: VCC (do not connect)
* **Green**: TX
* **White**: RX
* **Black**: GND

**Connection**: Only connect **TX, RX, and GND**. Ensure your debug tool supports **115200 baud rate**.

![Serial port cable](http://tanzhtanzh.oss-cn-shenzhen.aliyuncs.com/img/image-20241231145656021.png)

### Debug Pins on the Board

The K4B debug pins are a separate 3-pin header (not part of the 30-pin expansion header):\
![image-20250520101759515](http://tanzhtanzh.oss-cn-shenzhen.aliyuncs.com/img/image-20250520101759515.png)

**Wiring Method**:\
![image-20250520102125388](http://tanzhtanzh.oss-cn-shenzhen.aliyuncs.com/img/image-20250520102125388.png)

### Serial Terminal Software Setup (MobaXterm)

**Download**:

* Internal path: `5-DevelopmentTools\UART_DebugTool\MobaXterm_Portable_v20.3.zip`
* Official site: <https://mobaxterm.mobatek.net/>

**Configuration Steps**:

1. Create a new session.
2. Select "Serial" as the session type.
3. Choose the COM port (check in Windows Device Manager > Ports).
4. Set baud rate to **115200**.
5. Start the session.

![image-20250509173628697](http://tanzhtanzh.oss-cn-shenzhen.aliyuncs.com/img/image-20250509173628697.png)

## ADB

ADB (Android Debug Bridge) is a debugging tool for Android systems. It supports USB or network connections for app installation, file transfer, and command execution.

* For usage details, see [ADB\_Tutorial](https://tanzhs-private-organization.gitbook.io/kickpi-book/common/en/adb/adb_tutorial)

## SSH

SSH (Secure Shell) enables secure remote access over a network.

* To connect, obtain the board’s IP via the serial port or router admin page.
* For instructions, see [SSH](https://tanzhs-private-organization.gitbook.io/kickpi-book/common/en/linux/ssh)

![image-20250411103217477](http://tanzhtanzh.oss-cn-shenzhen.aliyuncs.com/img/image-20250411103217477.png)

## FAQ

### Power Supply Issues

**Symptom**: The green LED dims or flickers when connecting high-power peripherals, causing system instability.\
**Solution**: Ensure the power supply meets the total power requirements of all connected peripherals.