ELM327 version checking using AT commands

[ffries]

ATI returns version string, but it is sometimes false information.

According to: http://www.outilsobdfacile.fr/interface-diagnostic-elm-327.php

It is possible to check ALM317 version using;

• version 1.2 et + ATKW0 OK
• version 1.3 et + ATS0 OK
• version 1.3a et + ATFE OK
• version 1.4 et + ATSS OK
• version 1.4b et + ATCSM1 OK
• version 2.0 ATAMT 40 OK

I will use it to check ELM317 version upon startup.

[ffries]

This is a duplicate of https://github.com/brendan-w/python-OBD/issues/90

[ffries]

Closing.