Support / Knowledge Base / Embedded Dev kits Articles
XBee Cellular Antennas
For optimal performance with the XBee Cellular module, the antennas should be placed perpendicular to each other and not touching. For parallel placement, Digi recommends to have the antennas ...
https://www.digi.com/support/knowledge-base/xbee-cellular-antennas
Oct 10, 2017
How to find out the date code and manufacturing location information of Digi Products.
Depending on the location the units are built effects the orientation, linked below is the date code from USA or Thailand. The date code is 4 digits, 2 digit year and 2 digit week (YYWW) so in thes...
https://www.digi.com/support/knowledge-base/how-to-find-out-the-date-code-and-manufacturing-lo
Jul 06, 2017
Understanding MTBF (Mean Time Between Failures)
MTBF is defined as the point in time at which 1/e devices on average will still be operational (1/e is approximately 37%)Furthermore, MTBF specifically excludes wear-out factors. A fan’s MTBF may b...
https://www.digi.com/support/knowledge-base/understanding-mtbf-mean-time-between-failures
Jul 06, 2017
DTE vs. DCE
Digi makes many serial devices, some of which are DTE (Portserver TS, Etherlite, Connect/ConnectPort, Digi One, USB-to-serial, DiN Serial adapters), and others which are DCE (TransPort, PKG RF mode...
https://www.digi.com/support/knowledge-base/dte-vs-dce
Jul 06, 2017
What does "Galvanically isolated from Earth ground" mean?
"Galvanically isolated" is a term used to describe the relation between two different points in a circuit  It means that the ASYNC Signal Ground (SG) is isolated from earth ground, by vir...
https://www.digi.com/support/knowledge-base/what-does-galvanically-isolated-from-earth-ground
Jul 06, 2017
"Display must be set" error installing RealPort driver in SCO OpenServer
Symptom: In SCO OpenServer, when installing the RealPort driver from the CD with ./setup, a message "DISPLAY must be set to a valid display running X" appears. Solution: From the command...
https://www.digi.com/support/knowledge-base/display-must-be-set-error-installing-realport-driv
Jul 06, 2017
How to make an RS-232 loopback plug
Loopback plugs are very useful for initial serial port troubleshooting, to ensure the serial port in question is functional.A DB-9 loopback plug should have a female DB-9 connector and should be wi...
https://www.digi.com/support/knowledge-base/how-to-make-an-rs-232-loopback-plug
Jul 06, 2017
How to enable a Terminal or Modem in Solaris
Command to enable a terminal in Solaris pmadm -a -p zsmon -s a001s -fu -i root -v `ttyadm -V` -m "`ttyadm -d /dev/dty/a001s -l 9600 -s /usr/bin/login`" where: zsmon - is the...
https://www.digi.com/support/knowledge-base/how-to-enable-a-terminal-or-modem-in-solaris
Jul 06, 2017
US Robotics Modem Configuration in UNIX
 This guide demonstrates configuration of US Robotics Sportster and Courier modems for use in a dial-in application in a UNIX-type environment: DIP switches Sportster modems should be set initiall...
https://www.digi.com/support/knowledge-base/us-robotics-modem-configuration-in-unix
Jul 06, 2017
Using MultiTech Modems on Digi Ports in Unix
 This guide demonstrates configuration of many MultiTech Modems for use in a dialin application in a Unix-type environment:1. DIP Switches If the Modem has DIP switches, set them to the async defau...
https://www.digi.com/support/knowledge-base/using-multitech-modems-on-digi-ports-in-unix
Jul 06, 2017
"Garbage" is appearing on the screen instead of expected Login prompt in Solaris
Symptoms: B>Terminal initially receives login and works fine until the terminal is powered off and turned back on, then either the login won't appear or garbage characters will display on th...
https://www.digi.com/support/knowledge-base/garbage-is-appearing-on-the-screen-instead-of-expe
Jul 06, 2017
Error "insmod: dgrp: no module by that name found" when attempting to use dgrp_gui or dgrp_cfg_node
Symptom: The following error is seen: "insmod: dgrp: no module by that name found" when attempting to use dgrp_gui or dgrp_cfg_node to configure. Cause: Our driver normally places a syml...
https://www.digi.com/support/knowledge-base/error-insmod-dgrp-no-module-by-that-name-found-whe
Jul 06, 2017
Unresolved symbols and configuration mismatches
1. Example of the error messages in question:Using /lib/modules/2.4.2-2smp/misc/dgrp.o/lib/modules/2.4.2-2smp/misc/dgrp.o: unresolved symbol securebits/lib/modules/2.4.2-2smp/misc/dgrp.o: unresolve...
https://www.digi.com/support/knowledge-base/unresolved-symbols-and-configuration-mismatches
Jul 06, 2017
Configuring Terminals for Login in HP-UX
Enabling the New PortsTerminalsConnect terminals to the ports (using a Digi standard terminal cable) and test the connections to each terminal by entering the following command for each port added:...
https://www.digi.com/support/knowledge-base/configuring-terminals-for-login-in-hp-ux
Jul 06, 2017
Configuring ports for Printers in HP-UX
Serial Printers To prepare a port for connection to a printer, enter the following command: ditty printer [baud rate and flow control options] ttya01This command is recommended for any port that h...
https://www.digi.com/support/knowledge-base/configuring-ports-for-printers-in-hp-ux
Jul 06, 2017
Configuring Ports for Modems in HP-UX
Setting up ports for bi-directional modems Use vi to enable the new modem entries in the /etc/inittab file for dial-in. The following entries have been automatically added for the ports installed: ...
https://www.digi.com/support/knowledge-base/configuring-ports-for-modems-in-hp-ux
Jul 06, 2017
Recovering from AIX print spooler problems
Problem:The print spooler is in a "down" or "unknown" state.Cannot remove queued jobs.The "daemon" process is not running.Solution:stopsrc -s qdaemonlssrc -s qdaemon (...
https://www.digi.com/support/knowledge-base/recovering-from-aix-print-spooler-problems
Jul 06, 2017
AIX console information not displaying
Symptom: The information is not displaying from the AIX serial port even though there appears to be a successful connection to the port. Possible Causes:Carrier detect is not being asserted on the...
https://www.digi.com/support/knowledge-base/aix-console-information-not-displaying
Jul 06, 2017
The Solaris Console Information Does Not Appear
Symptom Even though there seems to be a successful connection to the port, no data is seen coming from the Solaris serial port. Possible Causes:The keyboard and mouse are still connected to the So...
https://www.digi.com/support/knowledge-base/the-solaris-console-information-does-not-appear
Jul 06, 2017
Getty Respawning too Rapidly Errors in SCO OpenServer
Symptom: Errors scroll on system console or can be found in /usr/adm/messages file. Cause: Device entry duplication in the /etc/inittab file. Solution: Edit the /etc/inittab file and remove dupli...
https://www.digi.com/support/knowledge-base/getty-respawning-too-rapidly-errors-in-sco-openser
Jul 06, 2017
Basic loopback testing in UNIX
1. Place the loopback plug into the corresponding port on the Digi product.  Depending on the product, a loopback plug may or may not have been shipped with it.2. From the UNIX root prompt, type:# ...
https://www.digi.com/support/knowledge-base/basic-loopback-testing-in-unix
Jul 06, 2017
General Certification Comments on Digi products
Check the main reference manual for the given Digi product.  Generally they have a section marked 'Certification'.  If the certification in question is not seen there it is most likely not ...
https://www.digi.com/support/knowledge-base/general-certification-comments-on-digi-products
Jul 06, 2017
Security Notice Bash Vulnerability "Shellshock"
Security Notice Bash Vulnerability "Shellshock"Digi International Security Notice Bash Vulnerability "Shellshock"Digi International Security NoticeOctober 2nd, 2014CVE-2014-6271...
https://www.digi.com/support/knowledge-base/security-notice-bash-vulnerability-shellshock
Jul 06, 2017
Digi International Security Notice Vulnerability "GHOST"
Digi International Security Notice Vulnerability "GHOST"Digi International Security NoticeOriginally issued March 6th, 2015, updated December 18, 2015CVE-2015-0235OverviewA critical secur...
https://www.digi.com/support/knowledge-base/digi-international-security-notice-vulnerability-g
Jul 06, 2017
HOW TO: Find Country of Origin (CoO) for Digi-manufactured products
It is Digi's goal to facilitate and expedite worldwide trade in the most effective and efficient manner, by proactively observing all international rules and regulations regarding export.To aid...
https://www.digi.com/support/knowledge-base/how-to-find-country-of-origin-coo-for-digi-manufac
Jul 06, 2017
Customer sent in equipment for root cause analysis by Digi Engineering or the RMA Dept
The customer sent in equipment via RMA for root cause analysis by Digi Engineering or Repairs/Manufacturing Assurance staff.
https://www.digi.com/support/knowledge-base/customer-sent-in-equipment-for-root-cause-analysis
Jul 06, 2017
RMA repair options
If your Digi product is damaged there is a chance it can be repaired.  Please contact Digi technical support and explain the situation.  You'll want to take some pictures too if this is possibl...
https://www.digi.com/support/knowledge-base/rma-repair-options
Jul 06, 2017
Technical Support RMA Authorization requirements
RMA requests must be submitted to Digi Technical Support and are either Authorized or Unauthorized.Unauthorized RMA requests are subject to potential NPF (No Problems Found) fees, i.e. if hardware ...
https://www.digi.com/support/knowledge-base/technical-support-rma-authorization-requirements
Jul 06, 2017
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