Re: Resetting old Repotec/Eusso switch without RST button or admin access

Yep. Thanks stj....

Re: Resetting old Repotec/Eusso switch without RST button or admin access

Just found out why I was getting the byte repeated 255 times. It's because this EEPROM uses only one byte for the address, specifically the first one you send, which was the MSB. So it read the same address until LSB counted to 255, then moved to the next one.

Incrementing by 1 now works fine. Since it's basically 4 2Kbit memories each addressed individually, the stop address should be 256 which indeed reads all the data.

This is the updated code:
[CODE]
#include <Wire.h>...

Re: Resetting old Repotec/Eusso switch without RST button or admin access

This is how it looks like in decimal+decoded character:
[CODE]0 0 97a 100d 109m 105i 110n 0 0 0 0 0 0 103g 114r 105i 1? 100d 101e 114r 0 0 0 0 2? 106j 24? 127<space> 0 4? 0 4? 110n[/CODE]

Here it is in hex only:
[CODE]0 0 61 64 6D 69 6E 0 0 0 0 0 0 67 72 69 1 64 65 72 0 0 0 0 2 6A 18 7F 0 4 0 4 6E[/CODE]

The character is 1 in decimal so that's definitely invalid and untypable on the keyboard. I'd say that's the reason the original owner got rid of it, they...

Re: Resetting old Repotec/Eusso switch without RST button or admin access

So I desoldered the EEPROM using a heatgun and I am trying to read it using Arduino UNO according to a [URL="https://www.youtube.com/watch?v=M4-1FqxVJjw"]video guide[/URL], but I chose to pull the write protection (WP) pin high to avoid overwriting any data inside it. I based my code on the one in this guide: [url]https://www.instructables.com/Reading-and-Writing-Data-to-External-EEPROM-Using-/#step5[/url].

This was my initial Arduino code (similar to C):
[CODE]
#include...

Re: Resetting old Repotec/Eusso switch without RST button or admin access


Alright, will try.


I did, sorry. Adding to the list:
blank admin
blank guest
blank root

Thank you so far....

Re: Resetting old Repotec/Eusso switch without RST button or admin access

I have tried these right now and failed:[LIST][*]admin admin[*]admin 123, 1234, ... 123456789[*]guest guest[*]guest 123, 1234, ... 123456789[*]blank blank[*]blank 123, 1234, ... 123456789[*]root root[*]root 123, 1234, ... 123456789[/LIST]


Haven't thought about that for some reason.
The bottom reveals:[LIST][*]24A08, 1KB I2C EEPROM: [*]SP232ACT, RS232 driver: [*]47LVC373AD, Octal D latch[*]IS61LV256 32K x 8 Static RAM: [*]The funny vias lead to traces on the bottom side, but don't...

So I have a Repotec RP-G3224V that a friend recently gave me so I can try to sell it or reuse in other way (can always disassemble for parts, but that's the last option). He bought it used online in "as is" condition many years ago. I tested the connectivity between the ports and found some configured isolated groups (see [URL="https://www.badcaps.net/forum/attachment.php?attachmentid=293114&stc=1&d=1678816583"]port isolation map.png[/URL]). I want to reset this configuration so all are connected together, however there is no reset button anywhere and the credentials...

Re: New Members - please post your introductions here

Hello, I am a 27 year old salvager of electronic components from e-waste. I have desoldered about 30 boards so far. I watch these YouTubers: Dave from EEVblog, Richard from Learn Electronic Repair and BigClive. BigClive caught my interest with modifying LED bulbs to last forever and be efficient so I began investigating e-waste. Richard from LER inspired me to try fixing (instead of desoldering) ATX power supplies. Not much success so far though.

PS: Sometimes I grab e-waste from the streets to "recycle"...