I bought a few opcoms from china and ended up with some fake mcu inside. Famous and infamous firmware version 1.45. I did upgrade them to 1.59 (maybe my mistake) and they never worked on my Corsa C. Not that they actually did with 1.45. No way.
While v5 hardware works without issues. I found out from reading on the net that you can change from v6 to v5. Some have done it already for loooong time. So I will do also.
First of all, lets compare v5 to v6. v5 has a PIC mcu, model PIC18F458-I/PT. v6 has another chinese MCU, marked OP-COM.
I found this picture which shows what changes are needed:
And started doing my own thing. Hot air soldering is the key. I managed to remove the MCU using 350 degrees on a square output flow head. The extra capacitor and diode also went away.
What next, I have the PIC kit 3 programmer ordered (missed the post today) and few PIC chips, hope to get it this week. As software, I found an archive with fw 1.39 and bootloader hex file. I will try it and let all know if it worked.
Just for fun! :thumb Can somebody translate in dutch for me, please? :wors
While v5 hardware works without issues. I found out from reading on the net that you can change from v6 to v5. Some have done it already for loooong time. So I will do also.
First of all, lets compare v5 to v6. v5 has a PIC mcu, model PIC18F458-I/PT. v6 has another chinese MCU, marked OP-COM.
I found this picture which shows what changes are needed:
And started doing my own thing. Hot air soldering is the key. I managed to remove the MCU using 350 degrees on a square output flow head. The extra capacitor and diode also went away.
What next, I have the PIC kit 3 programmer ordered (missed the post today) and few PIC chips, hope to get it this week. As software, I found an archive with fw 1.39 and bootloader hex file. I will try it and let all know if it worked.
Just for fun! :thumb Can somebody translate in dutch for me, please? :wors