| Electronics > Projects, Designs, and Technical Stuff |
| How to convert an adapter which is using usb to bluetooth? |
| << < (3/3) |
| Chriss:
Hmmmm.... This are interesting infos. Something is still unclear. I can remember when I made the same k/kl cables with the max232 ic. That time I didn't had access to ftdi ic's and I used them on real rs232 on my laptop. Then the usb port was involved and the ftdi ic was used but the main circuit was almost the same like with the max232. On the ftdi ic only the Rx and Tx line is used and the D+ and D- of course and the pwr line too. Elm327 also can use the KL protocol and is working well. It is true does elm327 can not multiplex the KL line but it is working. So, what did I'm missing? Old kk l cable with max232 was working that time on the same fiat punto 2001. like the same kk l cable with the ftdi today. I'm not really see what and where is the difference in the protocol. 20 years ago we used the max232 cos we don't had usb port on laptops and nowday they are here.. |
| rvalente:
Booth the FTDI and the native serial port bit bang some extra pulses, that why you'll run into problems to have a bluetooth module to replace, since you can't change the software... Besides that, what software are you using? vagcom? |
| Chriss:
I use vagcom also but many other interfaces and apps also, like MultiECU for Fiat cars etc. An interesting point for me here is does let's say I have to access the engine ecu with multiecu app and the airbag module on the same Fiat car which use the same ISO9141 K Line for both of the ecu's, elm327 can not access the airbag module but can access the engine ecu. But VAG KK-l interface can access both of them, I have just link pin7 from the interface to pin 7 on the OBD2 port in the car for engine ecu access. To access the airbag module I link the same K-line pin 7 from VAG KK-L to pin 3 in the DLC. If I do the same with let's say the ELM327, this interface can access the engine ecu but no way to access the airbag module. For first I was thinking maybe the multiECU didn't support AT commands to access the airbag module through ELM327, but reading now your post's I see maybe there is much more in the background. So, it is a bit confusing for me what's going on |
| Navigation |
| Message Index |
| Previous page |