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i have ne cabel els327 and all work

thenx

For me it also works with an ELM327 clone version.

i have cm327 cabel and work

CM327 is the same like ELS327. But i'm curios about the ELM327, because Ursadon told it won't do with it...

Cm327 is just an els27 conversmod just buys then then sticks a sticker on it and sell them for more as a cm327 you can pick an els27 up for around £6 if you look I think conversmod.de sell them at 25 + 5 for postage

Conversmod is just greedy

Still talking about money ?

file_checksum = 0x07CBFD62;

Hello. First post ... because I'm just learning and I don't have much to say. I was able to figure out how to calculate crc of the block. but I can't count the file_checksum from the header. How do you count it?
greetings

The header is not important, it can be copied from another file or used eg. VBF Tool and create header there.
Beware of differences in vbf tool version 2.2 and 2.3.

really easy ... just press save and the new value will appear in the file. the file size will change, but the new string can be moved to the old file with hexedit.
thanks