OLIMEX© 2017
A20-OLinuXino-LIME2 user's manual
The cable probably needs drivers – after successful driver installation a COM port device would show up
in the hardware manager of your computer. Then you would need to connect the serial cable wires to the
board as follows: RX line to UART1-TX pin; TX line to UART1-RX pin; GND to GND. The last pin of
UART1 connector is named 3.3V and it can be used to power the board, if you have other ways of power
the board leave 3.3V pin unconnected! Be careful to avoid the connection to the serial cable else there
would be a short-circuit. Make sure that the serial cable is connected to your personal computer and
recognized properly after driver installation.
Then open a terminal program on the serial (COM) port which the cable is associated with. The settings
for the connection are 115200 baud, 8-N-1. After everything else is set, you would need to power the
board as explained in “2.3 Powering the board”.
2.5.2 HDMI monitor
The board comes equipped with HDMI connector to connect to a compatible monitor. However, there is
no cable included. Make sure to use a tested HMDI cable.
All official Debian and Android images for A20-OLinuXino-LIME2 have HDMI output enabled by
default. The board should work out-of-the-box with a native HDMI monitor.
The default HDMI resolution in the official images is 720p60 (1280×720p at 60Hz). In order to change
that setting the video output on the LCD display you would need to run a configuration script (if you use
Debian Linux) or download a suitable image (if you use Android). Video output settings are hard-coded in
Android images but there are ways to edit the images. You might find more information about editing pre-
built Android images at this wiki article:
how to edit prebuilt Android images
More information about the video output settings and the usage of video settings script might be found in
chapter “2.6 Changing the default image resolution”.
2.5.3 LCD display
Various LCD displays can be attached to A20-OLinuXino-LIME2 and used to interact with the board.
Depending on the display chosen and whether you attempt to run Debian Linux or Android additional
video settings configuration may be required. It is always a good idea to have one of the other connection
options available as back-up (in case the video output settings need modification).
For more information refer to chapter “2.7 Connecting and calibrating a display”.
2.5.4 SSH via mini USB cable in Debian
The latest official Debian Linux image allows the use the USB_OTG connector for SSH connection
without the need of a LAN cable or a serial cable. You can use a mini USB cable connected between your
host PC and the on-board mini USB connector. For connection convenience there is a DHCP server
running specifically for USB0 interface. The DHCP server should give IP address to the new USB0
interface of your host PC so you can make SSH connection from your PC to the default board IP address
of the USB0 interface – 192.168.2.1.
You can connect to the board using a mini USB cable and an SSH client (if you use Windows you might
use "puTTY", for example) at address 192.168.2.1.
For Windows operating system – upon connection, the board should show up in "Windows Device
Manager" as "RNDIS Ethernet Gadget". You might be asked to install a driver. The drivers can be found
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