Hi, sorry for delay, been absent. First of all, my respect to all members of DK.
As you said, I don't have intention for career change.
It's just matter of someone's nature. I'm undergraduated engineer and also HB in Economics, with scope on IT. Have 20+ years of computer programming experience in may fields. Been done electronics for many years, today it's just a hobby. Last few years I'm doing consulting and technical support for few companies with main focus on NFC (Near Field Communication) and RFID technologies etc.
Enough introducing, I just wanted to make it clear why I came here.
It is a matter of human's nature. I always wanted to know how stuff works, no matter what is about. Same thing happened here, in this situation.
The easiest way is go to locksmith and do a new remote. It costs a lot in Serbia, some people here can confirm. It is relative to average salary in Serbia,let's say like this: Avg salary = 360 Euro , new plip+key+labour = 120 Euro , so it is 1/3 of average monthly wages, for car which is old more than 10 yrs.
Now, it is not a matter of money only. I can afford it, if needed, not a big deal. But everyone would try to solve problem as cheap as possible, so common. I have last resort to go to locksmith and do that. For the very same money I can install aftermarket alarm which will do the same stuff or even more... Nevermind that, I will decide what to do...
Problem is in the following subject: I saw this thread with title "
Reusing old Peugeot/Citroen remotes type 73373067B,C" so I started to read it. Basically, we speak here about NXP's (or Philips) PCF7936 chip, which is 125 kHz Hitag2 chip. Datasheets are available on web in NXP's public area.
So, since I'm not doing locksmithing or car programming etc but I have friends who does some of that stuff, I have access to diagnostic equipment etc, I wanted to see if it is possible to overcome problem other way, like for example old remote and new transponder or similar. It was just sort of "project challenge".
Other reason is a trust. Here in Serbia, many people claim themselves as "master" and they usually say they can solve any problem. Truth is very different. I asked few people and only one had answer. So, my apologies to simaservis1108 member, I think I can remember we spoke over the phone, he had straight answer btu the price was little over my expectations.
My assumptions was based on common practice here: if something is not working, change everything until you fix it. So I thought maybe it is not needed to change everything, maybe just transponder and code it via PP2000. It is the one who gives a seed for rolling code to remote, I thought. Well, that is what I thought. Now I see that remote has to be "blank" too, so BSI can learn it and they can sync their rolling codes sequence. Remote PCB has few components: one MCU, one crystal, few passive components, battery and buttons. That maeks me think that rolling seed is inside MCU's EEPROM (or some part of memory), so if you can't get into MCU (usually you can't, there is bootloader, maybe custom protocol etc) then you're stuck with it as a brick electronics.
Third and last, I was wondering about second-hand remotes on Ebay. Why someone sell it if it is not reusable? And what about Chinese clones? They are pretty cheap (20$ compared to 80$ for genuine) , but definitely they are not the same or even close to genuine part's design. They have coil which impersonates as transponder, which is in fact only physical transport layer of 125 kHz, while "chip" (PCF7936) state machine is in some small MCU. That makes me no confidence of using such solution.
I use this occasion to explain my reasons for posting her and following this thread. Also, once again, my apologies if someone had bad impression about my first post/answer.
FInally:
I doubt about that. You will always be few steps ahead if you improve your knowledge and skills. Of course, experience is something most valuable and none can get it from few DIY tutorials on YT or some forum. Finally, you are selling mostly your knowledge and experience to your customers. Only few percents of price is the fact that you have dedicated tools and machines. People come to you because you know how to solve a problem and you offer them some warranty. Common users does not come here or any other forum with similar topic.
Thanks everyone for patience, excuse me for long post.
Everyone input is appreciated about this matter.
Best regards.
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