Serial Debug Login

Overview

The debug serial port is one of the most direct ways to connect to the Rhino Pi A1 Mini, without the need to configure a display or network additionally.

Prerequisites

Hardware

1. Prepare a USB-to-TTL serial tool (e.g. CH340, CP2102)
2. Install the corresponding USB-to-serial driver
3. Prepare several jumper wires to connect the 40-pin header on the board

Software

1. Install a serial terminal tool (e.g. MobaXterm, PuTTY, SecureCRT)
2. Create a serial session with the baud rate set to 115200

Hardware Connection

1. Use a USB-to-TTL tool to connect the PC and the device:
   • Connect the USB end to the PC
   • Connect the jumper wires to pins 6, 8 and 10 of the 40-pin header on the Rhino Pi A1 Mini
2. Pin mapping:

40-pin	Function	Connect to
6	GND	GND of the USB-to-TTL tool
8	DEBUG_UART_TX	RX of the USB-to-TTL tool
10	DEBUG_UART_RX	TX of the USB-to-TTL tool

3. Power on the device and wait for the system to finish booting (the green LED stays on)

Establish a Serial Connection

1. Open the serial terminal tool and select the COM port of the USB-to-TTL tool
2. Configure the serial parameters:
   • Baud rate: 115200
   • Data bits: 8
   • Stop bits: 1
   • Parity: None
   • Flow control: None
3. Open the serial connection and press Enter to access the device command line