Digi TransPort WR31 Installation instructions

Test a WR31 Router
How to test a WR31 router step by step.
Technical Support
March 2016

Contents
1Introduction .........................................................................................................................................3
1.1 Outline ..........................................................................................................................................3
1.2 Assumptions.................................................................................................................................3
1.3 Corrections...................................................................................................................................3
1.4 Version..........................................................................................................................................3
2Physical Configuration.........................................................................................................................4
2.1 Equipment Required....................................................................................................................4
2.1.1 Diagram ....................................................................................................................................5
3Step by Step Instructions.....................................................................................................................6
3.1 Install FlashWriter ........................................................................................................................6
3.2 Download the .ALL file: ................................................................................................................6
3.3 Make the initial connections........................................................................................................6
3.4 Launch FlashWriter ......................................................................................................................7
3.5 Reviewing Flashwriter error messages......................................................................................15
4Check LEDs .........................................................................................................................................16
5Check W-WAN connectivity................................................................................................................17
5.1 Test SIM detection switch..........................................................................................................17
5.2 Test SIM 1....................................................................................................................................18
5.3 Test SIM 2....................................................................................................................................20
6Check W-WAN Signal Strength...........................................................................................................22
7Check USB ports.................................................................................................................................23
8Check ETH ports 1 and 2 ....................................................................................................................24
9Check Serial ports ..............................................................................................................................25

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1INTRODUCTION
1.1 Outline
Should it happen that the boot loader becomes corrupted on a WR31 product, it is possible for an end
user to re-load the boot loader by following this guide.
The symptoms of a corrupted boot loader are usually as follows. When applying the power, the only
LED to illuminates is the power LED. It is also possible that other “unusual” LED patterns may occur
depending upon how “damaged”the boot loader is.
1.2 Assumptions
This guide has been written for use by technically competent personnel with a good understanding of
the communications technologies used in the product and of the requirements for their specific
application.
This quick note applies only to:
Model: Digi Transport WR31
1.3 Corrections
Requests for corrections or amendments to this documentation are welcome and should be
addressed to: tech.suppor[email protected]
Requests for new quick notes can be sent to the same address.
1.4 Version
Version Number
Status
0.1
Draft
1.0
Completed 15.03.2016

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2PHYSICAL CONFIGURATION
2.1 Equipment Required
A PC running a Microsoft WindowsTM based operating system.
1. A PC connected to the Internet running a Microsoft WindowsTM operating system with a built
in serial comm. port. (USB to serial adaptors do not work well.)
2. A 9-way “straight through” serial cable to connect the PC directly to the WR31.
3. A “USB A to USB A” cable to connect the PC directly to the WR31. (No mistake, A to A)
4. An Ethernet switch/hub to connect the PC to the WR31 (usually your normal office Ethernet
switch/hub will be fine if there is a spare port)
5. CAT 5 cables to connect the WR31 and PC to the Ethernet switch.

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2.1.1 Diagram
The following diagram represents how the equipment will be connected during the repair process:
The internet connection is not essential but may be useful during troubleshooting. It is essential that
the PC’s Ethernet communication interface is configured correctly (e.g. it has an IP address)
Also note that the Ethernet switch/hub used must have spanning tree protocol disabled.

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3STEP BY STEP INSTRUCTIONS
3.1 Install FlashWriter
Install the latest version of FlashWriter from the following link:
http://ftp1.digi.com/support/firmware/FlashWriter.msi
3.2 Download the .ALL file:
Download the following zip file to your PC and extract all the contents to a single folder
http://ftp1.digi.com/support/firmware/transport/flashwriter/latest/wr31-flashwriter-x.x.x.x.zip
Click: http://ftp1.digi.com/support/firmware/transport/flashwriter/latest/
where X.X.X.X is the current firmware version.
Open the .ini file extracted and add the following text to the second line (be sure to include
the comma at the end).
bootimx28,
3.3 Make the initial connections
1. Connect the “straight-through” serial cable between the PC and the “Serial 0” on the WR31.
2. Connect the WR31’s Ethernet (LAN 0) port to your “office network”.
3. Ensure the PC is also connected to the same “office network”
4. Connect one end of the “USB A to USB A”lead to your PC. Do NOT connect to the other end to
the WR31 yet.

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3.4 Launch FlashWriter
Launch Flashwriter from the start menu. Select the communications port number (PC comm. port
number) to which the WR31 is connected. (On most PC’s with a built in serial port, this will be “1” OR
“2”. Leave the other settings at their default values (TFTP and Event driven mode ONLY ticked):
Click Load
If your PC has more than one network adapter, be sure to select the one that represents the
connection to “Office Network” illustrated in 0.
If your PC only has a single network adapter this screen will not appear:

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In the file dialogue, select the “ALL” file you extracted from the ZIP earlier:
And click “Open”.
The following message will appear:
It is critical that the correct selection is made at this point. Note characters 6 and 7 of the part number
(SKU) on the approval label. In the example below these are “L1”:

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Refer to the following table to determine which selection to make:

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Characters 6 & 7
Flashwriter Selection
00
100 No module
G1
5 Cinterion/Siemens MC75i/TC63i/MC75/Triorail
E1
5 Cinterion/Siemens MC75i/TC63i/MC75/Triorail
H0
9 Option HSDPA/HSUPA modules
H1
9 Option HSDPA/HSUPA modules
H2
9 Option HSDPA/HSUPA modules
C0
10 CMotech CDMA module
C1
11 Sierra Wireless CDMA module
C2
11 Sierra Wireless CDMA module
C3
10 CMotech CDMA module
C4
10 CMotech CDMA module
C6
10 CMotech CDMA module
C7
10 CMotech CDMA module
U0
9 Option HSDPA/HSUPA modules
U1
9 Option HSDPA/HSUPA modules
U2
13 Ericsson F3507g/F3607gw/F3307/F5521gw HSDPA module
U3
7 Sierra Wireless 3G module
U4
13 Ericsson F3507g/F3607gw/F3307/F5521gw HSDPA module
U5
17 Gobi UMTS or 18 Gobi CDMA
U6
13 Ericsson F3507g/F3607gw/F3307/F5521gw HSDPA module
U7
13 Ericsson F3507g/F3607gw/F3307/F5521gw HSDPA module
U8
17 Gobi UMTS
U9
24 Telit 3G
L1
28 Huawei LTE
L2
23 Novatel LTE
L3
23 Novatel LTE
L4
26 Sierra Wireless 4G/LTE module
L5
26 Sierra Wireless 4G/LTE module
L6
29 Telit LTE
L7
29 Telit LTE
L8
29 Telit LTE
L9
29 Telit LTE
The next screen provides some complex instructions:
Please ignore that it might show WR21, all is correct.
The instructions are broken down below for extra clarity:

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1. Using a thin screwdriver or a paperclip, keep the reset button pressed. Be careful to press soft,
but firm.
2. Insert the power lead –note that this is a locking barrel connector. It needs to be aligned
carefully and then twisted to prevent it from coming detached.
3. Keep the reset button held in for 10 full seconds. (When you let go of the reset button there
should be no change of the LED status –if there is you have not held it in for long enough.)
4. Within 15 seconds, insert the USB lead (that already has the other end connected to the PC)
into the WR31. At this point the PC should detect the WR31 and may need to install some USB
drivers. Wait for the PC to do this. (If nothing happens on the PC, then it may be that the reset
button was not held in for long enough, go back to step 1 and try again.)
5. Whilst the reset button is held, click OK in FlashWriter
6. If successful, you should be prompted to enter the 6 digit serial number. (Refer to the label
under the WR31 to find the serial number. Please ignore a leading ‘S’).
Please ensure that you enter the correct serial number as a wrong serial number would cause
a wrong MAC-Address!

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Click OK
7. If successful, you should be prompted to enter the hardware revision number. (Refer to the
label under the WR31 to find the correct hardware revision.)
Click OK

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8. You should see the .sbios file start to load:
After programming in the W-WAN counter and other options, next the .ALL file will start to
load:
9. After reboot and checks, the following message should be displayed:

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This means the WR31 has been successfully recovered.
10. Please remove the USB Cable when you have finished FlashWriter as it might disturb the
further testing procedure!
At this stage the following hardware components (and more) have been successfully tested:
FLASH
SDRAM
SRAM
ETHERNET 0
Serial port 0
Interface to radio module (if fitted)

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3.5 Reviewing Flashwriter error messages
If during the previous session an error occurred, please check the table below for the recommended
course of action:
Error Message
Recommendation
Failed to establish contact via the serial
port, please try again.
This procedure is quite tricky so it is quite possible you did not get the
timing quit correct. However if you can get passed this stage
repeatedly on a known working WR31 and this particular WR31 always
fails it must be faulty. Please create an RMA with reason Flashwriter
IMX28 boot failed.
XModem TX failure on pre-loading
bootloader.
Check that this repeatedly fails and that you can carry out the
procedure correctly on a known working router. If so then please create
an RMA with reason Flashwriter XModem TX failure on pre-loading
bootloader.
XModem did not initialise!
Check that this repeatedly fails and that you can carry out the
procedure correctly on a known working router. If so then please create
an RMA with reason Flashwriter XModem did not initialise!
sbios upload not confirmed by unit.
Check that this repeatedly fails and that you can carry out the
procedure correctly on a known working router. If so then please create
an RMA with reason Flashwriter sbios upload not confirmed by unit.
Scan failed DO NOT remove power from
unit.
Ignore the message, remove the power try again. Check that this
repeatedly fails and that you can carry out the procedure correctly on a
known working router. If so then please create an RMA with reason
Flashwriter scan failed.
Error re-accessing bootloader, >> prompt
not received after sending password.
Check that this repeatedly fails and that you can carry out the
procedure correctly on a known working router. If so then please create
an RMA with reason Error re-accessing bootloader, >> prompt not
received after sending password.
Unit did not reboot successfully after
loading bootloader.
Check that this repeatedly fails and that you can carry out the
procedure correctly on a known working router. If so then please create
an RMA with reason Flashwriter: Unit did not reboot successfully after
loading bootloader.
Unable to start TFTP
Check that the Ethernet cable is connected correctly and the LAN LED
is on. This error can often be “user error” or “network issues”. However
if this error is repeatable on the suspected bad router but does not
occur on a known good router then request an RMA with reason.
“Flashwriter TFTP failed to start”
Blue progress bar moves, but slowly and
with lots of re-tries and eventually fails.
This suggests a hardware problem or a network issue on your LAN.
Check again that this works on a known good router, if it does and it
still fails with this error on the suspected bad router then request an
RMA with reason. “Flashwriter TFTP failed to complete”
Unable to communicate with device after
reboot
Check to see if the router is continuously rebooting. Please contact Digi
technical support for help.
W-WAN module failed check - please
check you selected the correct module!
Be very careful to check that you are selecting the correct radio module
when you launch FlashWriter. This is the number one cause of this
error! If you are unsure of the type of radio module fitted open the
case.
If you are sure you are selecting the correct radio module and if this
error is repeatable on the suspected bad router yet works fine on a
known good router, please request an RMA with reason: “Flashwriter
radio check failed.”

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4CHECK LEDS
Connect both Ethernet ports to a switch.
Access the CLI (Command Line Interface) –this can be achieved:
Through the serial port @115200 bps
Via a telnet or SSH connection
Via the “execute a command” page of the web user interface.
Issue the “flashleds” command and check that all LEDs are illuminated. If there is an LED fault please
request an RMA with code:
“xLED failure” where x is:
Power LED
SERVICE
WWAN
Signal III
Signal II
Signal I
SYSTEM
LAN 0
LAN 1
The upper Ethernet LED will only light if a working network cable is attached.

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5CHECK W-WAN CONNECTIVITY
5.1 Test SIM detection switch
With the router powered off, insert a SIM card into BOTH SIM slots of the WR31 and open the CLI
interface.
Access to the CLI (Command Line Interface) –this can be achieved:
Through the serial port @115200 bps
Via a telnet or SSH connection
Via the “execute a command” page of the web user interface.
Issue the following command:
simconn ?
This command tells you which SIM slots are populated and also the SIM that is currently in use. The
value before the comma is SIM 1 and the value after the comma is SIM 2. 1000 means that the SIM is
present. 1001 means that the SIM is present and the active SIM. Here is a summary:
1 = SIM not present
1000 = SIM present
1001 = SIM present and connected
The output should be as follows:
simconn ?
simconn: 1001,1000
OK
Showing that SIM 1 is present and active and SIM 2 is present.
If the SIM cards are physically inserted but do not show as present please request an RMA with reason
“SIM DETECTION FAIL”

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5.2 Test SIM 1
Ensure that an antenna (or both if using an LTE unit) is connected and the router is located in an area
with good signal strength.
Navigate to:
Configuration - Network > Interfaces > Advanced > PPP 1 > Mobile
Change W-WAN SIM: from “Any” to “SIM 1”
Click Apply.
Next navigate to
Configuration - Network > Interfaces > Mobile
And select SIM 1
Under “Mobile Settings”
Enter the correct APN for the SIM card installed in slot 1
Click Apply.

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Navigate to:
Management - Connections > PPP Connections > PPP 1
Wait for up to 5 minutes and check for a valid IP address
You may need to refresh the page for the new address to appear (click on >PPP 1)
If a valid IP address is NOT found, please download the debug.txt and email this to Digi Technical
Support ([e-mail]) or open a case at http://www.digi.com/support/eservice/ for
assistance.
Instructions on how to extract the debug.txt can be found in the following application note:
http://ftp1.digi.com/support/documentation/QN_024_Extracting%20the%20debug.txt%20file%20fro
m%20a%20Digi%20TransPort%20or%20Sarian%20router.pdf

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5.3 Test SIM 2
Navigate to:
Configuration - Network > Interfaces > Advanced > PPP 1 > Mobile
Change “W-WAN SIM: from “SIM 1”to “SIM 2”
Click Apply.
Next navigate to
Configuration - Network > Interfaces > Mobile
And select SIM 2
And under “Mobile Settings”
Enter the correct APN for the SIM card installed in slot 2
Click Apply