Jump to content
CarPort ForumCarPort Forum

The right KKL-Interface: USB or RS232 ?


alexander
 Share

Recommended Posts

We recommend using a USB KKL-interface based on the USB-serial converter chip from FTDI with CarPort car diagnostics software. Most of the available USB KKL-interfaces use this kind of converter chip (if in doubt, ask the dealer).

 

The FTDI-chip allows a more stable connection to ECUs that communicate at custom baudrates. Additionally the latencies are lower with the FTDI-chip. Even though, when using a RS232 KKL-interface, the converted signal is immediately available at the RS232 connector, the time it takes till this information is available in windows is typically around 5ms. When using the FTDI-chip the time is around 2ms. Although this difference might seem small, it can have some impact to the very timing sensitive KWP1281 protocol.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.