OCflash Downgrade OPCOM firmware if was upgraded from 2011 2012 official software

**pasteleo** · 24th February, 2023, 12:33 AM

thanks for this information

**rzk** · 27th February, 2023, 11:45 AM

Hello,

I have FW 1.70 how to downgrade it to 1.67 to use 200603a. I have believe i have (checked) real pic there is no C9 and D5 inside.

What are the steps, do i need to downgrade it firstly to 1.39? Do i need to do something with Restore FDI or not?

Can someone provide manual step by step what is necessary to do to downgrade to fw 1.67? Also what this means (Attention! OP-COM 200603a only works with original firmware version 1.67. The firmware update to version 1.67 in the OP-COM 200603a program occurs automatically when the program starts.) is it necessary to flash it if i have 1.70 fw i just need to install 200603a with internet and program will install 1.67?

OPCOMFUT.png

OPCOM-restore-to-ori.png

Sorry and thanks for your support in advance.

**Mario6** · 27th February, 2023, 02:36 PM

Originally Posted by rzk

Hello,

I have FW 1.70 how to downgrade it to 1.67 to use 200603a. I have believe i have (checked) real pic there is no C9 and D5 inside.

What are the steps, do i need to downgrade it firstly to 1.39? Do i need to do something with Restore FDI or not?

Can someone provide manual step by step what is necessary to do to downgrade to fw 1.67? Also what this means (Attention! OP-COM 200603a only works with original firmware version 1.67. The firmware update to version 1.67 in the OP-COM 200603a program occurs automatically when the program starts.) is it necessary to flash it if i have 1.70 fw i just need to install 200603a with internet and program will install 1.67?

OPCOMFUT.png

OPCOM-restore-to-ori.png

Sorry and thanks for your support in advance.

Read here.

https://www.digital-kaos.co.uk/forum...ighlight=Opcom

**jannik19999** · 22nd March, 2023, 06:36 PM

Hello Guys

I have a 1.99 opcom, i somehow managed to flash to version 1.39, then to 1.64.
But now i get an error message when i try so flash any version (I wanted to flash version 1.67)

Any ideas on how to fix this, or what went wrong?
If i have a fake PIC, how did i flash it in the first place?

Thanks in advance

**Mario6** · 22nd March, 2023, 08:42 PM

Originally Posted by jannik19999

Hello Guys

I have a 1.99 opcom, i somehow managed to flash to version 1.39, then to 1.64.
But now i get an error message when i try so flash any version (I wanted to flash version 1.67)

Any ideas on how to fix this, or what went wrong?
If i have a fake PIC, how did i flash it in the first place?

Thanks in advance

Hi.
You can forget about it. You killed your Opcom because it has a fake PIC 18F458. (FW 1.99 always fake PIC that can't be reprogrammed)
Buy a second one with a real PIC.
Good luck.

**ari01** · 30th May, 2023, 05:50 PM

Originally Posted by Rucan

Hi

Here FW 1.33; 1.39; 1.41; 1.43; 1.44; 1.45; 1.59

Thanks man. I apreciate it.

**eras3r** · 20th August, 2023, 12:55 PM

Thanks for firmware

**lucas39** · 29th August, 2023, 11:03 AM

please don't forget to say thank you.

**Promatter** · 4th September, 2023, 09:40 PM

Which firmware version have you found to work best with Astra H?

**kokodrs** · 20th October, 2023, 03:34 PM

Originally Posted by manocao

i found a program that is supposed to be able to downgrade opcom firmware to 1.39 EVEN if it was upgraded to 1.41 or 1.43 or 1.44 or 1.45 by means of 2011 2012 official opcom software

no matter if you started some 2011 2012 official opcom version with interface plugged in computer, which would have upgraded to 1.43 or 1.44 but disabling bootloader

2011 and 2012 official software versions of opcom dont erase pic of interface but disable bootloader

ocflash doesnt work if you started some 2010 version with interface plugged in computer, which erased your interface's pic

howto:

1. connect opcom interface through usb only
2. run ocflash
3. click on "request interface" to check actual version programmed on interface
4. if programmed version is 1.44 or 1.45 click "load firmware" and select fw139.hex from "Firmwarefiles" folder
5. click "change"
6. select "automatic mode" and click "flash"

DOWNLOAD:

Oh, why I always logged out when I try to download that OCFlash.zip file? can anyone help please?
Thanks a lot

**kokodrs** · 24th October, 2023, 08:37 PM

Thank you very much for sharing your result, I really hope that every one tried to downgrade any china clone version 1.xx to 1.39 to share his experience and results.

@zwkrz many thanks to you.

**milosmaka** · 3rd January, 2024, 08:10 PM

hello, what opcom firmware i will need for OP-COM_200603a for mine 2018 car please? i have installed software but when i go to test interface nothing happening, im currently on 1.45 and will not install automaticaly.

**HoracioFiesta** · 26th January, 2024, 01:28 AM

Hi fellas. Sorry to refloat this. I've recently bought an OPCOM for my girl's Corsa C. I want to make some keys. I've one of those v1.70 that I'm willing to downgrade. I've downloaded 090714 but EPROM button is not shown. I've not downgraded firmware yet, but i think software should be showing it, doesn't it?

**azkalany** · 28th January, 2024, 10:13 PM

can any one help me to find fw1.99

**HoracioFiesta** · 28th January, 2024, 11:43 PM

FYI I recently bought one of those "v1.70" and I think I won the lottery. I've used it with Fantomel 200603 and it read the security code without downgrading it. I've already made 2 more fob keys and lurked around the bcm blocks like a child in a toy store