ShoutingElectronics #42 - Lost Tags

When a customer looses their Admin tag for a door control system, and there is no factory reset, we find another way to recover the system
Lattice Controller :
www.centsys.co...
25LC512 EEProm Datasheet : ww1.microchip....
Wiring Diagrams :
docs.arduino.c...
Eeprom Library :
wolles-elektro...

[@SeanBZA]

See somebody was medieval on the power screws before you. Pity it is 13MHz, I have the 138kHz clone maker from China, which works well to clone the cheap tags. I got the cost back of the kit already making spare tags for my sister, as she needed 2 extra tags, and the BC wanted to charge an arm and leg for them. Clone kit was R100 for the kit with 20 tags, including the SAPO vig.

[@jct4647]

Nice problem solving video ("boer-maak-'n-plan).

[@mojeena1]

Hi. Please can you assist me with pictures of the manual that indicate adding and removing of tags. I'd really appreciate as i need to add/removes tags for BC.

[@SeanBZA]

You could have copied code no 7 down to the start, and gotten it to be admin tag that way, and saved all the other programmed tags as well. Then copied the other higher ones down, and filled the last block with FF. Note 64000 bytes is not 64k, that is 65536, as the Arduino IDE will use decimal numbers, unless you specify hex implicitly. But that space is not used here anyway. Likely the reason Centsys discontinued then is they cannot get the PIC microcontrollers any more, and have changed the microcontrollers they use to a different TI part, because of that. Good thing about that is the led display and arcane programming with timed button presses, hand waving, decrypting the odd display characters all went to the new 5 button and LCD display, even if you do need a magnifying glass to see the screen.

[@herminionhaguiombe9219]

Thank you for the video
How to reset the GSWITCH0V4 password