EVK-R8 - User guide
UBX-22018774 - R02
Board quick start
Page 8 of 25
C1-Public
2.2.3.2
Communication via UART
1.
For communication via the UART interfaces, use one of the following connections:
a.
Connect a USB cable to
J501
(mini-USB), the Cellular USB Main UART. The LED
DL501
turns
blue. When a USB cable is connected to this mini-USB connector, two COM ports are enabled
in Windows.
•
The main 8-wire UART interface of the cellular system is available over the first COM
port opened by the driver after the end of the cellular system boot, once the cellular
system is switched on.
•
The 2-wire UART interface of the LENA-R8001M10 GNSS system is available over the
second COM port opened by the driver after the end of the GNSS system boot.
b.
Connect an RS232 cable to the
J500
, the Cellular RS232 Main UART, a DB9 connector: the
main 8-wire UART interface of the cellular system is available over RS232 after the cellular
system boot, once the cellular system is switched on.
c.
Connect a USB cable to
J600
(mini-USB), the Cellular USB two UARTs. The
LED600
turns
green. The two 4-wire UART interfaces of the cellular system are each available over the two
numbered COM ports opened by the driver, after the end of the cellular system boot once the
cellular system is switched on. (To enable two UART interfaces, see the AT commands
, the +USIO AT command.)
Type of connections
SW401
SW403
J601
LED
Access to the main UART interface over the
Cellular USB
(Main UART) mini-USB connector on EVB-WL3 (J501)
ON BOARD
MINIUSB
Jumper socket
on pins 1-2
DL403
DL501
Access to the LENA-R8001M10 GNSS UART interface over
the
Cellular USB
mini-USB connector on EVB-WL3 (J501)
ON BOARD
MINIUSB
Jumper socket
on pins 1-2
DL403
DL501
Access to the main UART interface over the
Cellular RS232
(Main UART) DB9 connector on EVB-WL3 (J500)
ON BOARD
DB9
Jumper socket
on pins 1-2
DL405
Access to the two UART interfaces over the
Cellular USB
(Two UARTs) mini-USB connector on ADP-R8 (J201)
B2B
Do not care
Jumper socket
on pins 2-3
DL404
DS201
Access to UART(s) interface(s) over the
DIL B2B header
on
the top of the adapter board (J402)
B2B
Do not care
No jumper socket DL404
Table 2: UART serial interfaces configuration
Run an AT terminal (such as the u-blox m-center tool) selecting the AT port, with these settings:
Data rate
Data bits
Parity
Stop bits
Flow control
115200 bit/s
8
N
1
HW
See
appendix
for how to configure the u-blox m-center AT terminal for Windows.
2.
Press
SW302
, the cellular
power-on button, to switch on the cellular system of LENA-R8 module.
2.3
Switch off the cellular system
To switch off the cellular system in the EVK-R8, send the +CPWROFF AT command.
☞
Issue AT+CPWROFF command before switching off the main power supply, otherwise settings
and configuration parameters may not be saved in the non-volatile memory of the cellular module.
