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Messages - secarica

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1
As I said, I connected directly (also) via cross cable. Why the need for a router only to connect 2 devices, physically connected only to each other, each with unique IP address ? Especially if these are already working this way very well in non-safe mode.

Default SBC subnet mask address is 255.0.0.0 and I didn't changed it but I also suspect there is no way to change this while in safe mode. Also on PC were the same 255.0.0.0 mask address, which is set (autocompleted) automatically when I specified an 10.1.0.xx local address (where xx was 99 and later 9). At the same time all these settings are working very well in non-safe mode.

Internet ? No need for internet here. Again, what has to do the internet with 2 devices, physically connected only to each other, each with unique IP address ? The final device is a rackmounted relay-based video bypass switch, that has nothing to do with the internet at least not the physical network segment where the SBC65EC is involved.

This (the subject) is specifically about forgotten password (or username). Even if I informed the end user that he must take care of the chosen username and password, I also need to offer him a solution just in case it fails to do so. In one case I can go there and check the module with my PICKit, but generally speaking this is not a solution (and gives a bad reputation of the overall product I mean the one which I built).

Cristi

2
Still an open question: I get now another few brand new SBC65EC's and tried to simulate how would the end user recover, set or reset a forgotten password: I could not found any method for him! (except with a PICKit adapter as stated above, but that is not a "field" solution)

The safe mode could have been a solution, but it simply does not work (at all). There are several postings here about failure to connect in safe mode (for example this one) and the same thing occurs here: no response from the SBC board in safe mode. I tried to connect either via router or directly (either based on the Auto-MDI/X feature of the PC interface or via cross cable) / with one of the three default documented addresses / via web browser or via netloader application (either the 107 version with embedded JRE on an XP machine or the separate 106 version with 32bit JRE installed on a Vista 64bit machine) / by changing and later reverted the default address to 10.1.0.1 (as when someone cannot access the standard web pages to configure this) / by enabling or disabling DHCP via serial interface (again, as when someone cannot access the standard web pages to configure this).

Is there a bug in the safe mode portion of the bootloader ?

Edit: I also observed a strange thing by scanning the local addresses aggressively with a IP scanner application, the LED stops blinking fast and returns to normal blink mode and the board seems to return to normal operation (still with the jumper in safe mode position and without touching anything on board); I did't extend the tests here because I cannot imagine a practical use for this. I also observed that the IP scanning found two valid addresses (for a given class), i.e. the default 10.1.0.1 and the one I set manually before like 10.1.0.2, only that one of the two were marked as inactive or something.

Cristi

3
In a network environment with several SBC65EC boards, I would like to have the page title on each with their NETBIOS name, so when one loads a page it should see at once which board is which.

The proper place is the title page in master frame ("Modtronix SBC65EC Web Server" or "Modtronix SBC65EC Web Server Configuration", the one written on yellow background, in index.htm or xcfg.htm files respectively; this should display something like "NETBIOS - Modtronix SBC65EC Web Server" or "NETBIOS - Modtronix SBC65EC Web Server Configuration" respectively, where NETBIOS is the name as set in Network Settings page).

The NETBIOS name, editable, appears to be displayed in the page generated by xncfg.cgi based on a javascript script but the editable feature is not required in a title.

Is there a way to achieve this ? The title is in <head>...</head> portion and I don't know if a javascript can take action there.

?

Thank you,
Cristi

4
I am using a SBC65EC assembly, mounted into a metal enclosure. All internal circuits must be isolated from the metal housing, which is earthed. This is easy to be done with my other circuits and power supply, but unfortunately the SBC has the RJ-45 connector shield connected to the electrical ground and the shield is very close to the enclosure cutout, so they may have electrical contact.

I can hack the printed circuit board with a milling machine and isolate the printed circuit that goes to the RJ shield, but it is somewhat difficult, I have to unsolder the RJ connector first and the cosmetic result to the SBC board is catastrophic.

I can make the enclosure cutout a bit larger, but is looks ugly. My question is if there is somewhere a thin plastic frame, or gasket, or something, designed specifically for RJ-45 connectors, which should just surround the connector and "press and fit" in the case cutout.

Thank you,
Cristi

5
I know that the serial number when connecting to the serial interface is used for the last two numbers of the MAC address. Ok, but what is the exact equivalence ?

The numbers entered in serial have to be hex ? Decimal ?
How to specify the first pair (or number, if decimal) and how to specify the second pair (or number, if decimal) ?

Cannot check right now for myself and I have to write some instructions on this and don't know what to write actually. On the last test I made I entered 1234 or 12345 (cannot remember exactly) and the last two MAC values in web interface were 226 and 64.

Thank you,
Cristi

6
Suppose I build a device based on SBC65EC, where the end user will change the default username or password and then forget it. How can the user force a password change or reset ?

Resetting the board does not seem to reset the username or password. Command ?la=new_string will require authentication with the old username and password, so this must be known. The serial interface does not offer this option either.

I know how to change directly the EEPROM string data with my PICKit 2 adapter, but this is not an option for an end user.

Any solution for this ?

Cristi

7
Serial LCD Displays / how can the display board be programmed ?
« on: May 15, 2012, 10:36:26 PM »
I have a PICKit (2) with which I can program the SBC65EC board, or just read or modify directly the EEPROM, via ICP connector.

But I don't understand how can I do the same to the LCD2S board. I should compile some program for the SBC board that in turn will run and write the desired content to the LCD board ? Or what else ?

Cristi

8
Solved, the multipin conductor between the display and the serial board was badly made (not Modtronix, custom and somewhat long).

Other than that, however it appears I have the LCD2SR1 module, because it is written on the adhesive stick over the board controller (actually it was, because I washed the board with isopropyl alcohol and the label erased; however the printing is barely visible when looking with a magnifier at some angle). What confused me is that the silk mark on the board says "LCD3SR1". Strange.

Sorry for the inconvenience :roll:

Cristi

9
I have a LCD3SR1 serial display module, which is connected to a SBC65EC board with a Modtronix-build cable. The serial display has connected a DEM 16226 SYH-LY display module. Two jumpers on the display module had to be changed in order to reverse the backlight polarity.

My problem is that the display does not show anything, except for the backlight. Even ignoring any character display programming, it seems to me that the LCD3SR1 does not receive any data from SBC65EC, because the backlight is always the same regardless the value I enter in the web page configuration.

I changed the two DIP switches in all four combination, no difference in either mode. Here seems to be a problem, because:
- in the LCD3SR1 documentation it is written that for I2C mode the switches should be 11 (chapter 5)
- in the SBC web page it is written that for I2C mode on LCD2S the switches should be 00; does this apply the same to LCD3S ?
- on the serial display board it is written with white ink that I2C-0 is 00

Either way I don't know where to start. Any similar experience sometime in the past ?

Thank you,
Cristi

10
I know that the IP address and DHCP status can be changed via serial port (at least this is the case for SBC65EC). Is it possible to use the USB port for configuration ? Is there already a PC application that can handle the USB port of SBC66EC ?

Cristi

11

Update June 2012
Our Netcruzer range of products has now got it's own web site at www.netcruzer.com, with a new forum at www.netcruzer.com/forum.
For all new posts relating to the Webserver Firmware, please USE THIS FORUM.


A face plate like this one which was build with SBC65EC board in mind is well suitable for SBC66EC board as well ? (ignoring the USB connector)

In other words, the (active) header connectors, RJ45 connector, LED status and power supply connector are on exactly the same positions on all SBC6x boards ?

Thank you,
Cristi

12
Well, thank you for the offer ! Most likely I will ask you for a pair or two next time I will purchase another things directly from you.

For the immediate need I solved this in a more brutal way – I desoldered the two connectors from the PT24E board and used them for my need, but I will probably want to restore the PT24E.

Anyway, in the future, for other boards & case, I will try to avoid the need for such custom hardware, by making the main board in this manner so I can use simple height connectors. I always need to remove the power connector, so I moved also the 3 pin serial connector to the main board to gain clearance between boards. Hopefully I will find the required suitable metal or plastic spacers length for this configuration.

Thank you,
Cristi

13
I have a PT24E prototype board with enclosure. Recently I purchased this header connector from Modtronix with the idea to use it on my own designed board, in the same enclosure.

Problem: the new connector pair is higher than the one from PT24E and so the top case cannot fit the bottom case because the SBC module remains too high mounted.

On the PT24E board, the second plastic spacer is very close to the first one.
On the new connector, the second plastic spacer is almost 3mm away from the first one. I tried to lower the second plastic spacer, but the SBC board still remains on top of the pins, because the female connector has limited depth.

What header connector is the one used on PT24E board ? Where from can be purchased so no further invention should be required ?

Cristi

14
Serial LCD Displays / IP address displayed ?
« on: November 27, 2009, 10:46:21 AM »
Is it possible to display the IP address on the LCD ?
This should cover both manual and DHCP situations.
Perhaps on the second row the DHCP status may be useful to be displayed too (something like DHCP: ON or OFF).

Thank you,
Cristi

15
Ethernet Boards (8-bit) / where from is this plastic spacer available ?
« on: November 26, 2009, 01:42:20 PM »
In this picture here http://www.modtronix.com/products/sbc65ec/sbc65ecr1_dfront.jpg the board is mounted on that plastic spacers.

Are these available from Modtronix, or should I search elsewhere ? What dimension ? Usual metal spacers lengths available with easy for me are 5mm, 8mm, 10mm, 15mm, 20mm, etc., whereas the space required on PT24E board appears to be 16mm.

Cristi

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