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Thread: A52 CarKit activation

  1. #1

    A52 CarKit activation

    I'm trying activate the CarKit in my A52 with a microcontroller (89C51). I have an original CarKit from Siemens and it send the following command to the phone to activate the CarKit mode:

    RX = cellphone recieve
    TX = cellphone Transmit

    RX - AT^SACD=2,"1A" [0D 0A]
    TX - AT^SACD=2,"1A" [0D 0A]
    TX - OK [0D 0A]

    RX - AT^SACD=2,"1A,00,2,1" [0D 0A]
    TX - AT^SACD=2,"1A,00,2,1" [0D 0A]
    TX - OK [0D 0A]

    TX - ^SACD: 1A,01,1,0,SSSSSSSSSSSSSSSS [0D 0A](16 numbers Hexa)

    RX - AT^SACD=2,"1A,01,2,RRRRRRRRRRRRRRRR" [0D 0A] (16 numbers Hexa)
    TX - OK [0D 0A]

    The cellphone sent the S's numbers to carkit and it answer the R's numbres.

    How can I calculate the R's numbers ? It's seens a kind of CRC of the given S's numbers.

    Thanks for the help !

    PS: Example of R and S numbers:

    ^SACD: 1A,01,1,0,F7342B2832344221
    AT^SACD=2,"1A,01,2,442AB576CC3CEBA0"

  2. #2
    Here some other numbers and anwers that I got:

    ^SACD: 1A,01,1,0,C6457F2832344221 _________> Line 1 (from cell)
    AT^SACD=2,"1A,01,2,AA1297437FDA0270"______> Line 2 (from CarKit)

    ^SACD: 1A,01,1,0,256C152832344221
    AT^SACD=2,"1A,01,2,BA130F662C293FAF"

    ^SACD: 1A,01,1,0,F7342B2832344221
    AT^SACD=2,"1A,01,2,442AB576CC3CEBA0"

    ^SACD: 1A,01,1,0,C768432832344221
    AT^SACD=2,"1A,01,2,846384608FC4073D"

    ^SACD: 1A,01,1,0,C6457F2832344221
    AT^SACD=2,"1A,01,2,AA1297437FDA0270"

    ^SACD: 1A,01,1,0,256C152832344221
    AT^SACD=2,"1A,01,2,BA130F662C293FAF"

    ^SACD: 1A,01,1,0,F7342B2832344221
    AT^SACD=2,"1A,01,2,442AB576CC3CEBA0"

    ^SACD: 1A,01,1,0,C768432832344221
    AT^SACD=2,"1A,01,2,846384608FC4073D"

    ^SACD: 1A,01,1,0,CB9A432832344221
    AT^SACD=2,"1A,01,2,BFFDA9D02618D583"

    ^SACD: 1A,01,1,0,3A022F2B32344221
    AT^SACD=2,"1A,01,2,42924398E6516A9D"

    ^SACD: 1A,01,1,0,EDC82F2B32344221
    AT^SACD=2,"1A,01,2,4FBFC041425DB2BB"

    ^SACD: 1A,01,1,0,306CAD2832344221
    AT^SACD=2,"1A,01,2,85B48D4E04498E3D"

    ^SACD: 1A,01,1,0,FC1A2B2832344221
    AT^SACD=2,"1A,01,2,2361E4AD899EA2A0"

    ^SACD: 1A,01,1,0,D7E22F2B32344221
    AT^SACD=2,"1A,01,2,6D82EFE63F77854D"

    ^SACD: 1A,01,1,0,CB9A432832344221
    AT^SACD=2,"1A,01,2,BFFDA9D02618D583"

    ^SACD: 1A,01,1,0,3A022F2B32344221
    AT^SACD=2,"1A,01,2,42924398E6516A9D"

    ^SACD: 1A,01,1,0,EDC82F2B32344221
    AT^SACD=2,"1A,01,2,4FBFC041425DB2BB"

    ^SACD: 1A,01,1,0,306CAD2832344221
    AT^SACD=2,"1A,01,2,85B48D4E04498E3D"

    Any Idea how can I calculate , from 8 bytes numbers of the Line 1, the 8 byte numbers of the line 2?

    TIA

    MOV

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