Removing devicemaster security features, Serial connection method, Removing – Comtrol Hub DeviceMaster User Manual
Page 171: Devicemaster security features
DeviceMaster Installation and Configuration Guide: 2000594 Rev. A
Troubleshooting and Technical Support - 171
Troubleshooting and Technical Support
Removing DeviceMaster Security Features
When presented with a DeviceMaster that has had all security options set and the
user is unaware of what the settings are, the restoring of a DeviceMaster can be
very difficult.
It may be necessary to use the DeviceMaster debug dongle provided with the
Software Developers Kit (SDK) or return the DeviceMaster to Comtrol after
obtaining an return material authorization (RMA) so that Comtrol can re-flash
the DeviceMaster with default values.
One of the following two conditions must be true, so that you can remove the
security settings from the DeviceMaster.
•
Serial connection using Port 1 to access RedBoot:
-
Bootloader timeout set to value greater than 10 seconds (default is 15
seconds).
-
A known good null modem cable.
-
A COM port on PC/Laptop.
•
Bootloader Command Console using an Ethernet connection
-
No password or a known password.
-
A known or discoverable IP address.
-
A utility such as Angry IP Scanner from
may be used to
discover IP addresses. If the IP range is unknown, a full scan from 0.0.0.1
to 255.255.255.255 may take a long time.
-
An Ethernet cable.
-
A PC/Laptop with a telnet application installed such as PuTTY included in
PortVision DX.
Serial Connection
Method
Use the following procedure to set up serial connection with a terminal server
program (for example, Test Terminal (WCom2), HyperTerminal or Minicom) and
the DeviceMaster.
Note: Optionally, you can use Test Terminal, which is included in PortVision DX
under the Tools >Applications > Test Terminal menu.
1.
Connect a null-modem cable from an available COM port on your PC to Port 1
on the DeviceMaster.
Note: See
Connecting Serial Devices
on Page 27 to build a null-modem cable.
2.
Configure the terminal server program to the following values:
•
Bits per second = 57600
•
Data bits = 8
•
Parity = None
•
Stop bits = 1
•
Flow control = None
3.
Reset the DeviceMaster.
Note: Depending on the model, disconnect and reconnect the power cable
(external power supply and no power switch) or turn the power switch
on and then off (internal power supply).
4.
Immediately type #!DM and press Enter in the
terminal program.
#!DM
RedBoot>dis
Loading disabled