Text Messages to Radio Screen

[mbt28]

Hello,

I am trying to send text messages to radio screen but nothing happens. How do you do that?

For example, I am using this to display Hi but nothing shows up.

C8 07 80 23 42 32 48 69 3D

[osvathrobi]

It is trial and error I think. In my car the old codes and message formats don't work properly. What I did is I wrote a listener and fiddled around with the radio and the buttons, and then tried to analyse the byte stream and figure out the messages. (you can also look at the http://imbmw.net/ ImBmw project and look at his display components)

[mbt28]

Hello,
But my radio unit doesnt have a display, it just simple BMW Business CD unit. I am trying to send something for that 12 line of character display. I tried to experiment with this python codes but no luck.

[Unoqueva]

I send text to a unit e46 BMW Business CD this way:
C8 11 80 23 42 01 XX XX XX XX XX XX XX XX XX XX XX XX CheckSum

XX = ascii char

[mbt28]

I would like to try your code. But where can calculate the checksum? I am trying with online checksum calculators but they are not working.

Additionaly, this message goes to IKE not to HU so will it work on the bench without ike?

Thank you.

[Unoqueva]

Try to send this code
C8 11 80 23 42 01 48 65 6C 6c 6F 21 20 6D 62 74 32 38 0B
To calculate the CheckSum I use the Windows calculator in programmer mode