Cooperative Vehicle Infrastructure (V2X) Specific
On-board Equipment WB-L20B
User Guide
WB-L20B User Guide
Catalog
I.
Product Profile ......................................................................................................................... 2
1.1 Product Features ..................................................................................................................... 2
1.2 Communication Interface ....................................................................................................... 2
II.
Equipment Installation ............................................................................................................ 2
2.1 Access toWB-L20B ................................................................................................................ 6
2.2 Log-in WB-L20B ................................................................................................................... 6
2.2.1 By serial port ....................................................................................................................... 6
2.2.2 By Wi-Fi ......................................................................................................................... 6
III.WB-L20B Automatic Start-up Items ....................................................................................... 7
IV.WB-L20B Software Use Guidance ......................................................................................... 8
4.1 Device Network Interface Introduction ................................................................................. 8
4.2Wi-Fi Use Guidance ................................................................................................................ 9
4.2.1 Modify Wi-Fi IP Address and Assign IP Address Pool .................................................. 9
4.3Ethernet Use Guidance .......................................................................................................... 10
4.3.1 ManuallyConfigure Ethernet Interface IP Address ...................................................... 10
4.3.2 AutomaticallyAcquire Ethernet Interface IP Address .................................................. 11
4.4 4G Network Interface Use Guidance ................................................................................. 11
4.5 System Upgrading Introduction ........................................................................................... 11
4.5.1 Upgrading File Preparation .......................................................................................... 11
4.5.2 Parameter Introduction ........................................................................................... 12
1
WB-L20B User Guide
I. Product Profile
WB-L20B on-board unit is the equipment dedicated in cooperative intelligent transportation (V2V, V2I,
V2X) based on 5.855 ~ 5.925GHz DSRC technology, providing DSRC (IEEE802.11 p), Bluetooth,
Wi-Fi, Bluetooth, Ethernet and CAN interfaces in connected vehicle. It is mainly used in collaborative
transportation, trafficsafety and automatic driving applications. WB-L20B is a class C device
according to Table 9 of ASTM E2213-03 and is for private application.
1.1 Product Features
DSRC standard supported
Comply with IEEE 802.11p, IEEE1609.X, SAE-J2735 protocol/standard
Provide user development package WB - SDK1.0
Working frequency: 5.855 GHz ~ 5.925 GHz
Transmission rate: 3 ~ 27 Mbps
1.2 Communication Interface
DSRC1/DSRC2 antenna interface, Wi-Fi interface
GPS antenna interface, USB2.0 interface
RS232/CAN interface, Ethernet RJ45 interface
II. Equipment Installation
This section focuses on the installation of WB-L20B. First, we introduce how to install power
cord, antennas onto the corresponding interfaces. (To prevent damage to the equipment, please
make sure to connect the antennas before power on); Then, we introduce how to use PC connecting
to WB-L20B through Ethernet cable, and then configure WB-L20B and view log files.
2
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WB-L20B Us
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P
we
Reset
Indicator
USB
Ethernet
CAN/232
Figure 1
1 WB-L20F
ont Panel
3
WB-L20B User Guide
GNSS
DSRC Antenna 2
DSRC Antenna 1
4G
Wi-Fi/BT
Figure 2-2 WB-L20B Rear Panel
Figure 2-3 is the antenna picture of WB-L20B,orderly are DSRC antenna (two units), 4G antenna
（optional，this product is without 4G function）, Wi-Fi/BT antenna, GNSS antenna. Before turning on
power, please install the antenna to the corresponding interface. DSRC antenna and GNSS antenna
should be installed outside the vehicle for better performance.
4
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DSRC Ante
WB-L20B Us
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Figure 2
r Guide
Wi-Fi Ante
3 WB-L20B
na G
Antennas
SS Antenn
Figure
igar lighte
ther side a
ebugging)
evel). Pow
2-4 is the
power cor
e two DB
and two C
r cord can
icture of a
. For
B9 specia
female (D
N interfac
access to 9
cessories f
extension
9 female
es (brown
~ 36v D
r WB-L20
wire, one e
is standar
ine connec
input (it is
B, orderly
nd is DB9
RS232, D
s to low le
recommen
re DB9 sp
ale, on th
9 female
el, green l
ded to use
cial exten
I is a seria
ne connect
2v DC inp
ion wire,
port for
to high
ut).
DB9 Sp
cial Extensi
n Wire
Figure 2-
WB-L20B
Cig
ccessories
r Lighter Po
er Cord
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WB-L20B Us
r Guide
.1 Acce
WB-L
ransferring
C,one can
s toWB-
0B provid
data with
use this wi
L20B
s mini- B
xternal de
e connect
SB male i
ices. Figur
o serial I o
Figure 2-
nterface, it
2-5 is DB
DB9 spec
DB9 Seria
can be use
serial por
al extensio
Port Wire
for install
wire. To a
wire (cab
ng progra
ccess WBle is option
s and
20B by
l).
.2 Log-
.2.1 By
Take s
ollows:
1) Op
2) Ch
3) Co
4) Cli
ictgen to
.2.2 By
n WB-L
erial po
rial port a
n Xshell5,
ose "SERI
figure para
k "Connec
omplete co
i-Fi
0B
t
cessing to
elect "ne
L" as prot
eters in S
", choose a
nnection.
l Xshell5 f
" connecti
col incata
RIAL pa
cept and s
r example
n;
og;
el.
ve key. T
the steps
en type in
f serial por
ser name:
accessing
oot and p
are as
ssword:
For se
Use X
1) Op
2) Sel
ting up Wi
hell5 to ac
n the Xshe
ct SSH as
Fi connect
ess device
l5, select "
rotocol, se
on, please
, the config
ew" conn
host addr
heck chap
ration ste
ction;
ss to 192.1
er four, se
s are as fo
68.110.1, p
tion two.
lows:
rt number
uses the d
fault port
6
WB-L20B User Guide
number 22.
3) Click "OK", choose accept and save key. Then type in user name: root and password: victgen
to complete connection.
III. WB-L20B Automatic Start-up Items
Check script /etc/init.d/S90init-stuff for WB-L20B startup items, here will explain how to
configure and edit each programwhich will run at the start of device.
1.To reviewscript S90init-stuff: vi/etc/init.d/S90init-stuff, as shown in figure 3-1:
Figure 3-1 Automatic Start Scripts
2. Script content is as follows:
gpsd.sh -- GPSD configuration script, through which user can configure GPSD serial port and
baud rate, the gpsdbaud rate is 115200.
run_wireless.sh -- Load Wi-Fi driver m odule, after running this script, device will act as an AP,
waiting wireless terminal to access by Wi-Fi.
run_ap.sh -- Hostapd configuration script, through whichuser can set IP address pool for client
devices.
run_bt.sh -- Bluetooth module loading script, after running this script,Bluetooth function is
7
WB-L20B User Guide
switch on.
start_wave.sh -- WAVE service module loading script, after running this script,DSRCfunction
is switch on.
rtl3d 192.168.110.1 224.0.0.1 -- Read local GNSS message, and send as multicast message
tomulticast group address 224.0.0.1 on Wi-Fi interface address 192.168.110.1.
IV. WB-L20B Software Use Guidance
4.1 Device Network Interface Introduction
After login system, input command “ifconfig” to view device network interface information, as
shown in figure 4-1:
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WB-L20B User Guide
Figure 4-1 Network Interface Info
Through “ifconfig”command, there are five network interfaces on the device, namely eth0, lo,
usb1, wave0 and wlan0. Eth0 is Ethernet interface, lo is local loopback interface, wave0 is DSRC
communication interface and wlan0 is Wi-Fi interface. Please note that SIM card is no t plugged in, usb1
interface won't appear.
4.2Wi-Fi Use Guidance
T ype in command “ifconfig” to view device networ k interface information, as shown in figure 4-2:
Figure 4-2 Wi-Fi Interface
The default interface for Wi-Fi is wlan0and default IP address is 192.168.110.1, this is the AP
address forother devices to connect to. User can change this IP address by editing corresponding
configuration file. See the next section for detail.
4.2.1 Modify Wi-Fi IP Address and Assign IP Address Pool
Use vi to open /etc/udhcpd.conf, find “start” and “end” items.
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WB-L20B User Guide
Figure 4-2-1Wi-Fi Assign IP Address Pool
Change the start and end configuration in green spot to modify the address pool of AP.The default
IP addresses for client is in 192.168.110.0 segment, totally 10 addresses (From 192.168.110.110 to
192.168.110.120). Note that if you want to modify default address, please make sure that “opt router”
item in udhcpd.conf has the same address segment as AP address segment, shown in figure 4-2-2
highlighted in green.
Figure 4-2-2 Wi-Fi IP Address Detailed Info
4.3Ethernet Use Guidance
4.3.1 ManuallyConfigure Ethernet Interface IP Address
Connect WB-L20B to PC via Ethernet cable, log in and input“ifconfig eth0 up” and“ifconfig eth0
192.169.5.200 netmask 255.255.255.0”. Then eth0 IP address can be seen, as shown in figure 4-3. Note
thatWB-L20B and PC must configure in the same network segment.
Figure 4-3 ManuallyConfigure Ethernet Interface
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WB-L20B User Guide
4.3.2 AutomaticallyAcquire Ethernet Interface IP Address
Connect WB-L20B to router via Ethernet cable, input “udhcpc -i eth0”, then WB-L20B’ s Ethernet
interface can obtain IP address automatically, as shown in figure 4-3-1.
Figure 4-3-1 AutomaticallyAcquire IP Address
4.4 4G Network Interface Use Guidance
Usb1 is the 4G network interface.WB-L20B obtained IP address 10.144.119.118from server. The
existence of this address stands that the device is capable of accessing to Internet, as shown in figure
4-4.
Figure 4-4 4G Network Interface
4.5 System Upgrading Introduction
4.5.1 Upgrading File Preparation
First of all, prepare the upgrade file such as kernel;copy upgrading file to any path of the device. T o
do this, user can use Linux SCP command under Linux or SSH, WinSCPunder Windows. Now
takingWinSCP as an example, the access configuration steps are as follows:
1) Open the WinSCP, configuration interface will appear as shown in figure 4-5;
2) SelectSCP as protocol, use 192.168.2.100 as host name, default 22 as port number, “root” as
11
WB-L20B User Guide
user name and “victgen” as password.Click "login" to complete access. (If host key related security
warning appears, select "update".)
After accessing using WinSCP shown in Figure4-5-1, with PC’s file directory on the left and
WB-L20B file directory on the right.Then user can do file operations. As user has roo t privilege, please
be cautious when applying operations.
4.5.2 Parameter Introduction
Viewsys_update.sh under /opt/scripts directory, this script supports four kinds of upgrading,
including DTB, Uboot, Kernel and FS. User can use command line to upgrade. (For
example,./sys_update.sh -x /xxx/xxxxxx.xxx)
1) -x to distinguish four types of upgrading files:
-d stands for DTB upgrading
-u stands for Uboot upgrading
-k stands for Linux Kernel upgrading
-f stands for Filesystem upgrading
-d、-u、-k、-f can be used in any combination, this means that not only one type upgrading file,
but multiple combination files can be used for upgrading. For example,-u, -k, -d, and -f using
at the same time means the device needs to upgrade using DTB, Uboot, Kernel and FS files at
the same time. Note that parameters are all lowercase letters.
2) /xxx/xxxmeans that upgrade file can locate in any path.
3) xxx.xxxstands for upgrading file name, this name can be user defined and has no format
requirements
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WB-L20B User Guide
Technical Specification
Mechanical Properties
Size
Shell Material
Weight
Color
Installation
Power Supply Mode
Communication Distance
Radio Frequency Output
Power
175*145*30（mm）
Sheet Metal Parts
About 700g
Black
Pre-install
Electric Properties
DC9V-36V
800M
-0.4dBm(Do not include the antenna gain and
regulation)
RF Performance
Operating Temperature
Storage Temperature
Operating Humidity
Working Frequency: 5.855GHz-5.925GHz
Channel Bandwidth: 10M (172~184),20M
Wireless Transmission Rate: 3M, 4.5M, 6M, 9M, 12M,
18M, 24M, 27Mbps
Channel Switching Delay<4ms
Environment Properties
-30℃~+50℃
-45℃~+85℃
10%-95% no condensation
13
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .
This transmitter must not be co-located or operating in conjunction with any other antenna or
transmitter.
This equipment should be installed and operated with minimum distance 20cm between the radiator&
your body.
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WB-L20B Us
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