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bpi-r1-hardware.md

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Banana Pi BPI-R1 (Lamobo R1) Hardware Specification

Overview

The Banana Pi BPI-R1 (also known as Lamobo R1) is an open-source smart router board based on the Allwinner A20 SoC. It is designed for smart home networking use, featuring 5 Gigabit Ethernet ports, onboard WiFi, SATA, and a form factor suited for router/NAS/gateway applications.

  • Manufacturer: SINOVOIP CO., LIMITED
  • Model: Lamobo R1 (BPI-R1)
  • Certifications: CE, FCC, RoHS
  • Product Size: 148 mm x 100 mm
  • Weight: 83 g

SoC and Processing

Component Specification
SoC Allwinner A20 (sun7i)
CPU ARM Cortex-A7 Dual-Core @ 1 GHz
GPU ARM Mali400MP2, OpenGL ES 2.0/1.1
Architecture ARMv7l (32-bit)

Memory and Storage

Component Specification
RAM 1 GB DDR3 (shared with GPU)
Onboard Storage Micro SD card slot (max 64 GB)
SATA 2.5" SATA disk support (up to 2 TB)

Networking

Component Specification
Ethernet Switch Broadcom BCM53125
Ethernet Ports 5x 10/100/1000 Mbps RJ45 (1 WAN + 4 LAN via VLAN)
SoC Interface Single RGMII to BCM53125
WiFi Realtek RTL8192CU, 802.11 b/g/n, 2T2R MIMO, 300 Mbps
WiFi Antennas 2x detachable external antennas (U.FL connectors)

Ethernet Security Note

The BCM53125 interconnects all 5 ports and the A20 SoC at Layer 2 by default. WAN/LAN separation requires VLAN configuration via MDIO. Without proper VLAN setup (during boot, bricked state, or misconfiguration), all ports are bridged together, which is a security concern for router use. The A20 has only a single RGMII interface.

Video

Component Specification
HDMI Standard HDMI 1.4 (Type A, full-size), 1080p output
LVDS/RGB 40-pin FPC connector (CON2) for LCD panel + I2C touch
CSI Camera 40-pin FPC connector (CON1) for camera module

Audio

Component Specification
Output 3.5 mm headphone jack, HDMI audio
Input Onboard microphone

USB

Component Specification
USB 2.0 Host 1x USB-A port
Micro-USB OTG 1x (also usable for power input)

Power

Component Specification
Primary Power 5V / 2A via Micro-USB (DC in only)
Battery 3.7V lithium battery connector (JST)
Power Management AXP209 PMU

Buttons and LEDs

Component Specification
Power Button Next to battery connector
Reset Button Next to power button (top side of PCB)
Power LED Red
User LED Green
RJ45 LEDs Activity/link indicators on Ethernet ports

GPIO and Expansion

CON3 - 26-pin GPIO Header (Raspberry Pi compatible layout)

Pin Function GPIO
1 VCC-3V3
2 VCC-5V
3 TWI2-SDA PB21
4 VCC-5V
5 TWI2-SCK PB20
6 GND
7 PWM1 PI3
8 UART3_TX PH0
9 GND
10 UART3_RX PH1
11 UART2_RX PI19
12 PH2 PH2
13 UART2_TX PI18
14 GND
15 UART2_CTS PI17
16 CAN_TX PH20
17 VCC-3V3
18 CAN_RX PH21
19 SPI0_MOSI PI12
20 GND
21 SPI0_MISO PI13
22 UART2_RTS PI16
23 SPI0_CLK PI11
24 SPI0_CS0 PI10
25 GND
26 SPI0_CS1 PI14

J13 - Console UART (UART0)

Pin Function GPIO
1 UART0-RX PB23
2 UART0-TX PB22

J12 - Auxiliary UART + GPIO

Pin Function GPIO
1 VCC-5V
2 VCC-3V3
3 PH5 PH5
4 UART7_RX PI21
5 PH3 PH3
6 UART7_TX PI20
7 GND
8 GND

Bus Interfaces on CON3

  • I2C: TWI2 (PB20/PB21)
  • SPI: SPI0 with 2 chip selects (PI10-PI14)
  • CAN Bus: CAN_TX/CAN_RX (PH20/PH21)
  • UART: UART2 (with CTS/RTS), UART3
  • PWM: PWM1 (PI3)

Other Interfaces

Interface Description
IR Receiver Onboard infrared receiver (sunxi-ir)
SATA Onboard SATA connector for 2.5" drives
CSI Camera 40-pin FPC (CON1), 8-bit parallel CSI
LVDS/RGB Display 40-pin FPC (CON2), 24-bit RGB LCD

Boot and Software

Item Detail
Boot Media Micro SD card (TF card)
Bootloader U-Boot
Device Tree sun7i-a20-lamobo-r1.dtb
Linux Kernel Mainline sunxi support (linux-sunxi)
Supported OS Linux (Armbian, Bananian, Ubuntu, Debian, Raspbian), OpenWrt, Android 4.4, OpenBSD, NetBSD
Board Family sun7i / sunxi

Armbian Reference Configuration

From the Armbian system snapshot in this repository:

BOARD=lamobo-r1
BOARD_NAME="Lamobo R1"
BOARDFAMILY=sun7i
LINUXFAMILY=sunxi
ARCH=arm
BRANCH=current

Key Kernel Modules

Module Purpose
8189fs / rtl8192cu Realtek WiFi driver
b53 BCM53125 Ethernet switch driver
sunxi-ir Infrared receiver
can4linux CAN bus (optional, community)

Key ICs

IC Function
Allwinner A20 Main SoC (dual-core Cortex-A7)
Broadcom BCM53125 5-port Gigabit Ethernet switch
Realtek RTL8192CU 802.11 b/g/n WiFi (USB-connected)
AXP209 Power management unit

References