Recent content by dan_n

I got notice that this chip will go out of production later this year. All 5v parts will go away eventually so I'm surprised it was still being made. No need to panic, currently Mouser has 9000+ and Digikey has 900+ in stock.

Hard to believe it's been 16 months since I started this thread. Along the way I created the only active HAI Omni development environment in the world. Other projects are taking most of my time now so I want to document some of the free software I used. I do all of my work in Linux which has...

The label on the E11 board shows Rev E11. Later board labels only show Rev E with the rev number hand written in marker on the pcb corner as you mentioned. I'm also wondering if the E11 Pro II had any setup/programming limitations compared to the later boards. It might make firmware updates a...

I've noticed a couple of unusual things on the Rev-E11 boards (all models). The first is a factory installed "bodge" wire on the back connecting a resistor and inductor behind the network chip. Rev-E12 boards have a trace there on the pcb so this was clearly a factory fix. The second is the...

I've had one these running in my main panel for over a year. Refurbished means it's erased and ready to program. You must tape over the window to prevent unwanted erase from ambient light.

I've released a utility firmware to reset the installer code, in this separate thread, using all of the info from my reverse engineering documented in this thread (many older posts updated with new information).

To program this firmware into different size chips, replace the first line of the HEX file with one of the following: chip size1st line of HEX file 128kB:020000040001F9 512kB:020000040007F3 1MB:02000004000FEB Any modern chip programmer can read the HEX file. But if for some reason...

Instructions: Wear a grounded anti-static wrist strap when handling any chips. Be very careful to not bend any pins when removing/inserting a chip. Pins on new chips are spread too wide and you may want to carefully bend the pins in a little first by gently pressing all pins on one side...

I've developed a small utility firmware that resets an unknown installer code to default (1111). Now that Leviton no longer offers this service, this firmware is needed to unlock panels that can't be unlocked by any other method. This firmware works on Omni ProII, 2e, and LTe panels. It's...

No bent pins? How long did you wait? First power on will appear dead while it takes 2-3 minutes erasing and re-writing memories and the STATUS led won't blink until it is finished. Don't power off during this time. If no change after 3 minutes then something is wrong. EDIT: confirmed this...

For my latest trick I changed an Omni 2e into a full OmniPro II. Only barrier I found was those sneaky bas*ards crippled the SRAM (not really, see EDIT below)! The attached pic (top) shows 0-ohm jumper resistors that a 2e has set to tie SRAM pin A17 to 5V so the SRAM is limited to 256kB...

Thanks for confirming that part number. I could only see part of a number in a blurry pic but that was enough to confirm a match with the erase/program code in the firmware. The earlier boards used a 512kB EPROM chip (M27C4001) for firmware and later when it got bigger used a 1MB EPROM chip...

I've sucessfully tested erasing and programming the flash memories in-circuit using my service firmware. I verified this on both flash chips confirming my understanding of the chip selects and extended addressing interactions. In theory I can now unbrick a panel that got bricked during an...

For what it's worth I've confirmed that the 4.0b firmware and language data in both flash chips are identical with each other and with the chip eproms. The language data exactly matches the 20A05-2 2.0 eprom chip I copied from my 20 year old panel. But I'm not sure where the 4.0b firmware file...

I've been working on a small standalone service firmware for diagnostics/repair. One interesting discovery is that the 2 flash chips seem to have the exact same data but in different places. I've also found firmware code that copies data from one flash chip to another so there may already be a...